fix MSSQL bug on org (#3405)

28 files changed, 1008 insertions, 161 deletions

diff --git a/vendor/github.com/go-xorm/builder/builder_select.go b/vendor/github.com/go-xorm/builder/builder_select.go
index 05f116e005..3a3967cccc 100644
--- a/vendor/github.com/go-xorm/builder/builder_select.go
+++ b/vendor/github.com/go-xorm/builder/builder_select.go
@@ -45,6 +45,10 @@ func (b *Builder) selectWriteTo(w Writer) error {
 		}
 	}
 
+	if !b.cond.IsValid() {
+		return nil
+	}
+
 	if _, err := fmt.Fprint(w, " WHERE "); err != nil {
 		return err
 	}
diff --git a/vendor/github.com/go-xorm/builder/cond_and.go b/vendor/github.com/go-xorm/builder/cond_and.go
index 9c30e9c2e5..e30bd186cd 100644
--- a/vendor/github.com/go-xorm/builder/cond_and.go
+++ b/vendor/github.com/go-xorm/builder/cond_and.go
@@ -25,7 +25,9 @@ func And(conds ...Cond) Cond {
 func (and condAnd) WriteTo(w Writer) error {
 	for i, cond := range and {
 		_, isOr := cond.(condOr)
-		if isOr {
+		_, isExpr := cond.(expr)
+		wrap := isOr || isExpr
+		if wrap {
 			fmt.Fprint(w, "(")
 		}
 
@@ -34,7 +36,7 @@ func (and condAnd) WriteTo(w Writer) error {
 			return err
 		}
 
-		if isOr {
+		if wrap {
 			fmt.Fprint(w, ")")
 		}
 
diff --git a/vendor/github.com/go-xorm/core/cache.go b/vendor/github.com/go-xorm/core/cache.go
index bf81bd52ba..8f9531da94 100644
--- a/vendor/github.com/go-xorm/core/cache.go
+++ b/vendor/github.com/go-xorm/core/cache.go
@@ -1,11 +1,12 @@
 package core
 
 import (
+	"bytes"
+	"encoding/gob"
 	"errors"
 	"fmt"
+	"strings"
 	"time"
-	"bytes"
-	"encoding/gob"
 )
 
 const (
@@ -55,11 +56,10 @@ func encodeIds(ids []PK) (string, error) {
 	return buf.String(), err
 }
 
-
 func decodeIds(s string) ([]PK, error) {
 	pks := make([]PK, 0)
 
-	dec := gob.NewDecoder(bytes.NewBufferString(s))
+	dec := gob.NewDecoder(strings.NewReader(s))
 	err := dec.Decode(&pks)
 
 	return pks, err
diff --git a/vendor/github.com/go-xorm/core/circle.yml b/vendor/github.com/go-xorm/core/circle.yml
index 006e1230bc..e6a05be272 100644
--- a/vendor/github.com/go-xorm/core/circle.yml
+++ b/vendor/github.com/go-xorm/core/circle.yml
@@ -11,4 +11,5 @@ database:
 test:
   override:
     # './...' is a relative pattern which means all subdirectories
-    - go test -v -race
\ No newline at end of file
+    - go test -v -race
+    - go test -v -race --dbtype=sqlite3
diff --git a/vendor/github.com/go-xorm/core/column.go b/vendor/github.com/go-xorm/core/column.go
index d9362e9857..65370bb5ba 100644
--- a/vendor/github.com/go-xorm/core/column.go
+++ b/vendor/github.com/go-xorm/core/column.go
@@ -79,6 +79,10 @@ func (col *Column) String(d Dialect) string {
 		}
 	}
 
+	if col.Default != "" {
+		sql += "DEFAULT " + col.Default + " "
+	}
+
 	if d.ShowCreateNull() {
 		if col.Nullable {
 			sql += "NULL "
@@ -87,10 +91,6 @@ func (col *Column) String(d Dialect) string {
 		}
 	}
 
-	if col.Default != "" {
-		sql += "DEFAULT " + col.Default + " "
-	}
-
 	return sql
 }
 
@@ -99,6 +99,10 @@ func (col *Column) StringNoPk(d Dialect) string {
 
 	sql += d.SqlType(col) + " "
 
+	if col.Default != "" {
+		sql += "DEFAULT " + col.Default + " "
+	}
+
 	if d.ShowCreateNull() {
 		if col.Nullable {
 			sql += "NULL "
@@ -107,10 +111,6 @@ func (col *Column) StringNoPk(d Dialect) string {
 		}
 	}
 
-	if col.Default != "" {
-		sql += "DEFAULT " + col.Default + " "
-	}
-
 	return sql
 }
 
diff --git a/vendor/github.com/go-xorm/core/scan.go b/vendor/github.com/go-xorm/core/scan.go
index 7da338d864..b7c159b274 100644
--- a/vendor/github.com/go-xorm/core/scan.go
+++ b/vendor/github.com/go-xorm/core/scan.go
@@ -44,6 +44,9 @@ func convertTime(dest *NullTime, src interface{}) error {
 		}
 		*dest = NullTime(t)
 		return nil
+	case time.Time:
+		*dest = NullTime(s)
+		return nil
 	case nil:
 	default:
 		return fmt.Errorf("unsupported driver -> Scan pair: %T -> %T", src, dest)
diff --git a/vendor/github.com/go-xorm/xorm/CONTRIBUTING.md b/vendor/github.com/go-xorm/xorm/CONTRIBUTING.md
index e0f6cfcdf2..37f4bc5fa8 100644
--- a/vendor/github.com/go-xorm/xorm/CONTRIBUTING.md
+++ b/vendor/github.com/go-xorm/xorm/CONTRIBUTING.md
@@ -32,13 +32,10 @@ proposed functionality.
 We appreciate any bug reports, but especially ones with self-contained
 (doesn't depend on code outside of xorm), minimal (can't be simplified
 further) test cases. It's especially helpful if you can submit a pull
-request with just the failing test case (you'll probably want to
-pattern it after the tests in
-[base.go](https://github.com/go-xorm/tests/blob/master/base.go) AND
-[benchmark.go](https://github.com/go-xorm/tests/blob/master/benchmark.go).
+request with just the failing test case(you can find some example test file like [session_get_test.go](https://github.com/go-xorm/xorm/blob/master/session_get_test.go)).
 
-If you implements a new database interface, you maybe need to add a <databasename>_test.go file.
-For example, [mysql_test.go](https://github.com/go-xorm/tests/blob/master/mysql/mysql_test.go)
+If you implements a new database interface, you maybe need to add a test_<databasename>.sh file.
+For example, [mysql_test.go](https://github.com/go-xorm/xorm/blob/master/test_mysql.sh)
 
 ### New functionality
 
diff --git a/vendor/github.com/go-xorm/xorm/README.md b/vendor/github.com/go-xorm/xorm/README.md
index c8c43894c3..9f6c20cbda 100644
--- a/vendor/github.com/go-xorm/xorm/README.md
+++ b/vendor/github.com/go-xorm/xorm/README.md
@@ -28,6 +28,8 @@ Xorm is a simple and powerful ORM for Go.
 
 * SQL Builder support via [github.com/go-xorm/builder](https://github.com/go-xorm/builder)
 
+* Automatical Read/Write seperatelly
+
 # Drivers Support
 
 Drivers for Go's sql package which currently support database/sql includes:
@@ -48,6 +50,13 @@ Drivers for Go's sql package which currently support database/sql includes:
 
 # Changelog
 
+* **v0.6.4**
+    * Automatical Read/Write seperatelly
+    * Query/QueryString/QueryInterface and action with Where/And
+    * Get support non-struct variables
+    * BufferSize on Iterate
+    * fix some other bugs.
+
 * **v0.6.3**
     * merge tests to main project
     * add `Exist` function
@@ -61,13 +70,6 @@ Drivers for Go's sql package which currently support database/sql includes:
     * add Scan features to Get
     * add QueryString method
 
-* **v0.6.0**
-    * remove support for ql
-    * add query condition builder support via [github.com/go-xorm/builder](https://github.com/go-xorm/builder), so `Where`, `And`, `Or` 
-methods can use `builder.Cond` as parameter
-    * add Sum, SumInt, SumInt64 and NotIn methods
-    * some bugs fixed
-
 [More changes ...](https://github.com/go-xorm/manual-en-US/tree/master/chapter-16)
 
 # Installation
@@ -106,15 +108,36 @@ type User struct {
 err := engine.Sync2(new(User))
 ```
 
-* `Query` runs a SQL string, the returned results is `[]map[string][]byte`, `QueryString` returns `[]map[string]string`.
+* Create Engine Group
+
+```Go
+dataSourceNameSlice := []string{masterDataSourceName, slave1DataSourceName, slave2DataSourceName}
+engineGroup, err := xorm.NewEngineGroup(driverName, dataSourceNameSlice)
+```
+
+```Go
+masterEngine, err := xorm.NewEngine(driverName, masterDataSourceName)
+slave1Engine, err := xorm.NewEngine(driverName, slave1DataSourceName)
+slave2Engine, err := xorm.NewEngine(driverName, slave2DataSourceName)
+engineGroup, err := xorm.NewEngineGroup(masterEngine, []*Engine{slave1Engine, slave2Engine})
+```
+
+Then all place where `engine` you can just use `engineGroup`.
+
+* `Query` runs a SQL string, the returned results is `[]map[string][]byte`, `QueryString` returns `[]map[string]string`, `QueryInterface` returns `[]map[string]interface{}`.
 
 ```Go
 results, err := engine.Query("select * from user")
+results, err := engine.Where("a = 1").Query()
 
 results, err := engine.QueryString("select * from user")
+results, err := engine.Where("a = 1").QueryString()
+
+results, err := engine.QueryInterface("select * from user")
+results, err := engine.Where("a = 1").QueryInterface()
 ```
 
-* `Execute` runs a SQL string, it returns `affected` and `error`
+* `Exec` runs a SQL string, it returns `affected` and `error`
 
 ```Go
 affected, err := engine.Exec("update user set age = ? where name = ?", age, name)
@@ -125,62 +148,76 @@ affected, err := engine.Exec("update user set age = ? where name = ?", age, name
 ```Go
 affected, err := engine.Insert(&user)
 // INSERT INTO struct () values ()
+
 affected, err := engine.Insert(&user1, &user2)
 // INSERT INTO struct1 () values ()
 // INSERT INTO struct2 () values ()
+
 affected, err := engine.Insert(&users)
 // INSERT INTO struct () values (),(),()
+
 affected, err := engine.Insert(&user1, &users)
 // INSERT INTO struct1 () values ()
 // INSERT INTO struct2 () values (),(),()
 ```
 
-* Query one record from database
+* `Get` query one record from database
 
 ```Go
 has, err := engine.Get(&user)
 // SELECT * FROM user LIMIT 1
+
 has, err := engine.Where("name = ?", name).Desc("id").Get(&user)
 // SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
+
 var name string
 has, err := engine.Where("id = ?", id).Cols("name").Get(&name)
 // SELECT name FROM user WHERE id = ?
+
 var id int64
 has, err := engine.Where("name = ?", name).Cols("id").Get(&id)
+has, err := engine.SQL("select id from user").Get(&id)
 // SELECT id FROM user WHERE name = ?
+
 var valuesMap = make(map[string]string)
 has, err := engine.Where("id = ?", id).Get(&valuesMap)
 // SELECT * FROM user WHERE id = ?
+
 var valuesSlice = make([]interface{}, len(cols))
 has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
 // SELECT col1, col2, col3 FROM user WHERE id = ?
 ```
 
-* Check if one record exist on table
+* `Exist` check if one record exist on table
 
 ```Go
 has, err := testEngine.Exist(new(RecordExist))
 // SELECT * FROM record_exist LIMIT 1
+
 has, err = testEngine.Exist(&RecordExist{
 		Name: "test1",
 	})
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
+
 has, err = testEngine.Where("name = ?", "test1").Exist(&RecordExist{})
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
+
 has, err = testEngine.SQL("select * from record_exist where name = ?", "test1").Exist()
 // select * from record_exist where name = ?
+
 has, err = testEngine.Table("record_exist").Exist()
 // SELECT * FROM record_exist LIMIT 1
+
 has, err = testEngine.Table("record_exist").Where("name = ?", "test1").Exist()
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
 ```
 
-* Query multiple records from database, also you can use join and extends
+* `Find` query multiple records from database, also you can use join and extends
 
 ```Go
 var users []User
 err := engine.Where("name = ?", name).And("age > 10").Limit(10, 0).Find(&users)
-// SELECT * FROM user WHERE name = ? AND age > 10 limit 0 offset 10
+// SELECT * FROM user WHERE name = ? AND age > 10 limit 10 offset 0
 
 type Detail struct {
     Id int64
@@ -193,14 +230,14 @@ type UserDetail struct {
 }
 
 var users []UserDetail
-err := engine.Table("user").Select("user.*, detail.*")
+err := engine.Table("user").Select("user.*, detail.*").
     Join("INNER", "detail", "detail.user_id = user.id").
     Where("user.name = ?", name).Limit(10, 0).
     Find(&users)
-// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 0 offset 10
+// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 10 offset 0
 ```
 
-* Query multiple records and record by record handle, there are two methods Iterate and Rows
+* `Iterate` and `Rows` query multiple records and record by record handle, there are two methods Iterate and Rows
 
 ```Go
 err := engine.Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
@@ -209,6 +246,13 @@ err := engine.Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
 })
 // SELECT * FROM user
 
+err := engine.BufferSize(100).Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
+    user := bean.(*User)
+    return nil
+})
+// SELECT * FROM user Limit 0, 100
+// SELECT * FROM user Limit 101, 100
+
 rows, err := engine.Rows(&User{Name:name})
 // SELECT * FROM user
 defer rows.Close()
@@ -218,7 +262,7 @@ for rows.Next() {
 }
 ```
 
-* Update one or more records, default will update non-empty and non-zero fields except when you use Cols, AllCols and so on.
+* `Update` update one or more records, default will update non-empty and non-zero fields except when you use Cols, AllCols and so on.
 
 ```Go
 affected, err := engine.Id(1).Update(&user)
@@ -243,21 +287,39 @@ affected, err := engine.Id(1).AllCols().Update(&user)
 // UPDATE user SET name=?,age=?,salt=?,passwd=?,updated=? Where id = ?
 ```
 
-* Delete one or more records, Delete MUST have condition
+* `Delete` delete one or more records, Delete MUST have condition
 
 ```Go
 affected, err := engine.Where(...).Delete(&user)
 // DELETE FROM user Where ...
-affected, err := engine.Id(2).Delete(&user)
+
+affected, err := engine.ID(2).Delete(&user)
+// DELETE FROM user Where id = ?
 ```
 
-* Count records
+* `Count` count records
 
 ```Go
 counts, err := engine.Count(&user)
 // SELECT count(*) AS total FROM user
 ```
 
+* `Sum` sum functions
+
+```Go
+agesFloat64, err := engine.Sum(&user, "age")
+// SELECT sum(age) AS total FROM user
+
+agesInt64, err := engine.SumInt(&user, "age")
+// SELECT sum(age) AS total FROM user
+
+sumFloat64Slice, err := engine.Sums(&user, "age", "score")
+// SELECT sum(age), sum(score) FROM user
+
+sumInt64Slice, err := engine.SumsInt(&user, "age", "score")
+// SELECT sum(age), sum(score) FROM user
+```
+
 * Query conditions builder
 
 ```Go
@@ -265,6 +327,59 @@ err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))
 // SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
 ```
 
+* Multiple operations in one go routine, no transation here but resue session memory
+
+```Go
+session := engine.NewSession()
+defer session.Close()
+
+user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
+if _, err := session.Insert(&user1); err != nil {
+    return err
+}
+
+user2 := Userinfo{Username: "yyy"}
+if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
+    return err
+}
+
+if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
+    return err
+}
+
+return nil
+```
+
+* Transation should on one go routine. There is transaction and resue session memory
+
+```Go
+session := engine.NewSession()
+defer session.Close()
+
+// add Begin() before any action
+if err := session.Begin(); err != nil {
+    // if returned then will rollback automatically
+    return err
+}
+
+user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
+if _, err := session.Insert(&user1); err != nil {
+    return err
+}
+
+user2 := Userinfo{Username: "yyy"}
+if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
+    return err
+}
+
+if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
+    return err
+}
+
+// add Commit() after all actions
+return session.Commit()
+```
+
 # Cases
 
 * [studygolang](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
diff --git a/vendor/github.com/go-xorm/xorm/README_CN.md b/vendor/github.com/go-xorm/xorm/README_CN.md
index cb2c1799ea..b4258d5405 100644
--- a/vendor/github.com/go-xorm/xorm/README_CN.md
+++ b/vendor/github.com/go-xorm/xorm/README_CN.md
@@ -115,12 +115,33 @@ type User struct {
 err := engine.Sync2(new(User))
 ```
 
-* `Query` 最原始的也支持SQL语句查询，返回的结果类型为 []map[string][]byte。`QueryString` 返回 []map[string]string
+* 创建Engine组
+
+```Go
+dataSourceNameSlice := []string{masterDataSourceName, slave1DataSourceName, slave2DataSourceName}
+engineGroup, err := xorm.NewEngineGroup(driverName, dataSourceNameSlice)
+```
+
+```Go
+masterEngine, err := xorm.NewEngine(driverName, masterDataSourceName)
+slave1Engine, err := xorm.NewEngine(driverName, slave1DataSourceName)
+slave2Engine, err := xorm.NewEngine(driverName, slave2DataSourceName)
+engineGroup, err := xorm.NewEngineGroup(masterEngine, []*Engine{slave1Engine, slave2Engine})
+```
+
+所有使用 `engine` 都可以简单的用 `engineGroup` 来替换。
+
+* `Query` 最原始的也支持SQL语句查询，返回的结果类型为 []map[string][]byte。`QueryString` 返回 []map[string]string, `QueryInterface` 返回 `[]map[string]interface{}`.
 
 ```Go
 results, err := engine.Query("select * from user")
+results, err := engine.Where("a = 1").Query()
 
 results, err := engine.QueryString("select * from user")
+results, err := engine.Where("a = 1").QueryString()
+
+results, err := engine.QueryInterface("select * from user")
+results, err := engine.Where("a = 1").QueryInterface()
 ```
 
 * `Exec` 执行一个SQL语句
@@ -129,67 +150,81 @@ results, err := engine.QueryString("select * from user")
 affected, err := engine.Exec("update user set age = ? where name = ?", age, name)
 ```
 
-* 插入一条或者多条记录
+* `Insert` 插入一条或者多条记录
 
 ```Go
 affected, err := engine.Insert(&user)
 // INSERT INTO struct () values ()
+
 affected, err := engine.Insert(&user1, &user2)
 // INSERT INTO struct1 () values ()
 // INSERT INTO struct2 () values ()
+
 affected, err := engine.Insert(&users)
 // INSERT INTO struct () values (),(),()
+
 affected, err := engine.Insert(&user1, &users)
 // INSERT INTO struct1 () values ()
 // INSERT INTO struct2 () values (),(),()
 ```
 
-* 查询单条记录
+* `Get` 查询单条记录
 
 ```Go
 has, err := engine.Get(&user)
 // SELECT * FROM user LIMIT 1
+
 has, err := engine.Where("name = ?", name).Desc("id").Get(&user)
 // SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
+
 var name string
 has, err := engine.Where("id = ?", id).Cols("name").Get(&name)
 // SELECT name FROM user WHERE id = ?
+
 var id int64
 has, err := engine.Where("name = ?", name).Cols("id").Get(&id)
+has, err := engine.SQL("select id from user").Get(&id)
 // SELECT id FROM user WHERE name = ?
+
 var valuesMap = make(map[string]string)
 has, err := engine.Where("id = ?", id).Get(&valuesMap)
 // SELECT * FROM user WHERE id = ?
+
 var valuesSlice = make([]interface{}, len(cols))
 has, err := engine.Where("id = ?", id).Cols(cols...).Get(&valuesSlice)
 // SELECT col1, col2, col3 FROM user WHERE id = ?
 ```
 
-* 检测记录是否存在
+* `Exist` 检测记录是否存在
 
 ```Go
 has, err := testEngine.Exist(new(RecordExist))
 // SELECT * FROM record_exist LIMIT 1
+
 has, err = testEngine.Exist(&RecordExist{
 		Name: "test1",
 	})
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
+
 has, err = testEngine.Where("name = ?", "test1").Exist(&RecordExist{})
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
+
 has, err = testEngine.SQL("select * from record_exist where name = ?", "test1").Exist()
 // select * from record_exist where name = ?
+
 has, err = testEngine.Table("record_exist").Exist()
 // SELECT * FROM record_exist LIMIT 1
+
 has, err = testEngine.Table("record_exist").Where("name = ?", "test1").Exist()
 // SELECT * FROM record_exist WHERE name = ? LIMIT 1
 ```
 
-* 查询多条记录，当然可以使用Join和extends来组合使用
+* `Find` 查询多条记录，当然可以使用Join和extends来组合使用
 
 ```Go
 var users []User
 err := engine.Where("name = ?", name).And("age > 10").Limit(10, 0).Find(&users)
-// SELECT * FROM user WHERE name = ? AND age > 10 limit 0 offset 10
+// SELECT * FROM user WHERE name = ? AND age > 10 limit 10 offset 0
 
 type Detail struct {
     Id int64
@@ -206,10 +241,10 @@ err := engine.Table("user").Select("user.*, detail.*")
     Join("INNER", "detail", "detail.user_id = user.id").
     Where("user.name = ?", name).Limit(10, 0).
     Find(&users)
-// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 0 offset 10
+// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 10 offset 0
 ```
 
-* 根据条件遍历数据库，可以有两种方式: Iterate and Rows
+* `Iterate` 和 `Rows` 根据条件遍历数据库，可以有两种方式: Iterate and Rows
 
 ```Go
 err := engine.Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
@@ -218,6 +253,13 @@ err := engine.Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
 })
 // SELECT * FROM user
 
+err := engine.BufferSize(100).Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
+    user := bean.(*User)
+    return nil
+})
+// SELECT * FROM user Limit 0, 100
+// SELECT * FROM user Limit 101, 100
+
 rows, err := engine.Rows(&User{Name:name})
 // SELECT * FROM user
 defer rows.Close()
@@ -227,7 +269,7 @@ for rows.Next() {
 }
 ```
 
-* 更新数据，除非使用Cols,AllCols函数指明，默认只更新非空和非0的字段
+* `Update` 更新数据，除非使用Cols,AllCols函数指明，默认只更新非空和非0的字段
 
 ```Go
 affected, err := engine.Id(1).Update(&user)
@@ -252,20 +294,39 @@ affected, err := engine.Id(1).AllCols().Update(&user)
 // UPDATE user SET name=?,age=?,salt=?,passwd=?,updated=? Where id = ?
 ```
 
-* 删除记录，需要注意，删除必须至少有一个条件，否则会报错。要清空数据库可以用EmptyTable
+* `Delete` 删除记录，需要注意，删除必须至少有一个条件，否则会报错。要清空数据库可以用EmptyTable
 
 ```Go
 affected, err := engine.Where(...).Delete(&user)
 // DELETE FROM user Where ...
+
+affected, err := engine.ID(2).Delete(&user)
+// DELETE FROM user Where id = ?
 ```
 
-* 获取记录条数
+* `Count` 获取记录条数
 
 ```Go
 counts, err := engine.Count(&user)
 // SELECT count(*) AS total FROM user
 ```
 
+* `Sum` 求和函数
+
+```Go
+agesFloat64, err := engine.Sum(&user, "age")
+// SELECT sum(age) AS total FROM user
+
+agesInt64, err := engine.SumInt(&user, "age")
+// SELECT sum(age) AS total FROM user
+
+sumFloat64Slice, err := engine.Sums(&user, "age", "score")
+// SELECT sum(age), sum(score) FROM user
+
+sumInt64Slice, err := engine.SumsInt(&user, "age", "score")
+// SELECT sum(age), sum(score) FROM user
+```
+
 * 条件编辑器
 
 ```Go
@@ -273,6 +334,59 @@ err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))
 // SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
 ```
 
+* 在一个Go程中多次操作数据库，但没有事务
+
+```Go
+session := engine.NewSession()
+defer session.Close()
+
+user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
+if _, err := session.Insert(&user1); err != nil {
+    return err
+}
+
+user2 := Userinfo{Username: "yyy"}
+if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
+    return err
+}
+
+if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
+    return err
+}
+
+return nil
+```
+
+* 在一个Go程中有事务
+
+```Go
+session := engine.NewSession()
+defer session.Close()
+
+// add Begin() before any action
+if err := session.Begin(); err != nil {
+    // if returned then will rollback automatically
+    return err
+}
+
+user1 := Userinfo{Username: "xiaoxiao", Departname: "dev", Alias: "lunny", Created: time.Now()}
+if _, err := session.Insert(&user1); err != nil {
+    return err
+}
+
+user2 := Userinfo{Username: "yyy"}
+if _, err := session.Where("id = ?", 2).Update(&user2); err != nil {
+    return err
+}
+
+if _, err := session.Exec("delete from userinfo where username = ?", user2.Username); err != nil {
+    return err
+}
+
+// add Commit() after all actions
+return session.Commit()
+```
+
 # 案例
 
 * [Go语言中文网](http://studygolang.com/) - [github.com/studygolang/studygolang](https://github.com/studygolang/studygolang)
diff --git a/vendor/github.com/go-xorm/xorm/context.go b/vendor/github.com/go-xorm/xorm/context.go
new file mode 100644
index 0000000000..074ba35a80
--- /dev/null
+++ b/vendor/github.com/go-xorm/xorm/context.go
@@ -0,0 +1,26 @@
+// Copyright 2017 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.8
+
+package xorm
+
+import "context"
+
+// PingContext tests if database is alive
+func (engine *Engine) PingContext(ctx context.Context) error {
+	session := engine.NewSession()
+	defer session.Close()
+	return session.PingContext(ctx)
+}
+
+// PingContext test if database is ok
+func (session *Session) PingContext(ctx context.Context) error {
+	if session.isAutoClose {
+		defer session.Close()
+	}
+
+	session.engine.logger.Infof("PING DATABASE %v", session.engine.DriverName())
+	return session.DB().PingContext(ctx)
+}
diff --git a/vendor/github.com/go-xorm/xorm/convert.go b/vendor/github.com/go-xorm/xorm/convert.go
index 0504bef155..2316ca0b4d 100644
--- a/vendor/github.com/go-xorm/xorm/convert.go
+++ b/vendor/github.com/go-xorm/xorm/convert.go
@@ -209,10 +209,10 @@ func convertAssign(dest, src interface{}) error {
 		if src == nil {
 			dv.Set(reflect.Zero(dv.Type()))
 			return nil
-		} else {
-			dv.Set(reflect.New(dv.Type().Elem()))
-			return convertAssign(dv.Interface(), src)
 		}
+
+		dv.Set(reflect.New(dv.Type().Elem()))
+		return convertAssign(dv.Interface(), src)
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		s := asString(src)
 		i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
diff --git a/vendor/github.com/go-xorm/xorm/dialect_postgres.go b/vendor/github.com/go-xorm/xorm/dialect_postgres.go
index 3f5c526f72..d6f71acc1d 100644
--- a/vendor/github.com/go-xorm/xorm/dialect_postgres.go
+++ b/vendor/github.com/go-xorm/xorm/dialect_postgres.go
@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
-	"sort"
 	"strconv"
 	"strings"
 
@@ -765,13 +764,18 @@ var (
 		"YES":                       true,
 		"ZONE":                      true,
 	}
+
+	// DefaultPostgresSchema default postgres schema
+	DefaultPostgresSchema = "public"
 )
 
 type postgres struct {
 	core.Base
+	schema string
 }
 
 func (db *postgres) Init(d *core.DB, uri *core.Uri, drivername, dataSourceName string) error {
+	db.schema = DefaultPostgresSchema
 	return db.Base.Init(d, db, uri, drivername, dataSourceName)
 }
 
@@ -923,7 +927,7 @@ func (db *postgres) IsColumnExist(tableName, colName string) (bool, error) {
 
 func (db *postgres) GetColumns(tableName string) ([]string, map[string]*core.Column, error) {
 	// FIXME: the schema should be replaced by user custom's
-	args := []interface{}{tableName, "public"}
+	args := []interface{}{tableName, db.schema}
 	s := `SELECT column_name, column_default, is_nullable, data_type, character_maximum_length, numeric_precision, numeric_precision_radix ,
     CASE WHEN p.contype = 'p' THEN true ELSE false END AS primarykey,
     CASE WHEN p.contype = 'u' THEN true ELSE false END AS uniquekey
@@ -1024,8 +1028,7 @@ WHERE c.relkind = 'r'::char AND c.relname = $1 AND s.table_schema = $2 AND f.att
 }
 
 func (db *postgres) GetTables() ([]*core.Table, error) {
-	// FIXME: replace public to user customrize schema
-	args := []interface{}{"public"}
+	args := []interface{}{db.schema}
 	s := fmt.Sprintf("SELECT tablename FROM pg_tables WHERE schemaname = $1")
 	db.LogSQL(s, args)
 
@@ -1050,8 +1053,7 @@ func (db *postgres) GetTables() ([]*core.Table, error) {
 }
 
 func (db *postgres) GetIndexes(tableName string) (map[string]*core.Index, error) {
-	// FIXME: replace the public schema to user specify schema
-	args := []interface{}{"public", tableName}
+	args := []interface{}{db.schema, tableName}
 	s := fmt.Sprintf("SELECT indexname, indexdef FROM pg_indexes WHERE schemaname=$1 AND tablename=$2")
 	db.LogSQL(s, args)
 
@@ -1117,10 +1119,6 @@ func (vs values) Get(k string) (v string) {
 	return vs[k]
 }
 
-func errorf(s string, args ...interface{}) {
-	panic(fmt.Errorf("pq: %s", fmt.Sprintf(s, args...)))
-}
-
 func parseURL(connstr string) (string, error) {
 	u, err := url.Parse(connstr)
 	if err != nil {
@@ -1131,46 +1129,18 @@ func parseURL(connstr string) (string, error) {
 		return "", fmt.Errorf("invalid connection protocol: %s", u.Scheme)
 	}
 
-	var kvs []string
 	escaper := strings.NewReplacer(` `, `\ `, `'`, `\'`, `\`, `\\`)
-	accrue := func(k, v string) {
-		if v != "" {
-			kvs = append(kvs, k+"="+escaper.Replace(v))
-		}
-	}
-
-	if u.User != nil {
-		v := u.User.Username()
-		accrue("user", v)
-
-		v, _ = u.User.Password()
-		accrue("password", v)
-	}
-
-	i := strings.Index(u.Host, ":")
-	if i < 0 {
-		accrue("host", u.Host)
-	} else {
-		accrue("host", u.Host[:i])
-		accrue("port", u.Host[i+1:])
-	}
 
 	if u.Path != "" {
-		accrue("dbname", u.Path[1:])
+		return escaper.Replace(u.Path[1:]), nil
 	}
 
-	q := u.Query()
-	for k := range q {
-		accrue(k, q.Get(k))
-	}
-
-	sort.Strings(kvs) // Makes testing easier (not a performance concern)
-	return strings.Join(kvs, " "), nil
+	return "", nil
 }
 
-func parseOpts(name string, o values) {
+func parseOpts(name string, o values) error {
 	if len(name) == 0 {
-		return
+		return fmt.Errorf("invalid options: %s", name)
 	}
 
 	name = strings.TrimSpace(name)
@@ -1179,31 +1149,36 @@ func parseOpts(name string, o values) {
 	for _, p := range ps {
 		kv := strings.Split(p, "=")
 		if len(kv) < 2 {
-			errorf("invalid option: %q", p)
+			return fmt.Errorf("invalid option: %q", p)
 		}
 		o.Set(kv[0], kv[1])
 	}
+
+	return nil
 }
 
 func (p *pqDriver) Parse(driverName, dataSourceName string) (*core.Uri, error) {
 	db := &core.Uri{DbType: core.POSTGRES}
-	o := make(values)
 	var err error
+
 	if strings.HasPrefix(dataSourceName, "postgresql://") || strings.HasPrefix(dataSourceName, "postgres://") {
-		dataSourceName, err = parseURL(dataSourceName)
+		db.DbName, err = parseURL(dataSourceName)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		o := make(values)
+		err = parseOpts(dataSourceName, o)
 		if err != nil {
 			return nil, err
 		}
+
+		db.DbName = o.Get("dbname")
 	}
-	parseOpts(dataSourceName, o)
 
-	db.DbName = o.Get("dbname")
 	if db.DbName == "" {
 		return nil, errors.New("dbname is empty")
 	}
-	/*db.Schema = o.Get("schema")
-	if len(db.Schema) == 0 {
-		db.Schema = "public"
-	}*/
+
 	return db, nil
 }
diff --git a/vendor/github.com/go-xorm/xorm/engine.go b/vendor/github.com/go-xorm/xorm/engine.go
index 15c619d33b..444611afb1 100644
--- a/vendor/github.com/go-xorm/xorm/engine.go
+++ b/vendor/github.com/go-xorm/xorm/engine.go
@@ -47,6 +47,23 @@ type Engine struct {
 	disableGlobalCache bool
 
 	tagHandlers map[string]tagHandler
+
+	engineGroup *EngineGroup
+}
+
+// BufferSize sets buffer size for iterate
+func (engine *Engine) BufferSize(size int) *Session {
+	session := engine.NewSession()
+	session.isAutoClose = true
+	return session.BufferSize(size)
+}
+
+// CondDeleted returns the conditions whether a record is soft deleted.
+func (engine *Engine) CondDeleted(colName string) builder.Cond {
+	if engine.dialect.DBType() == core.MSSQL {
+		return builder.IsNull{colName}
+	}
+	return builder.IsNull{colName}.Or(builder.Eq{colName: zeroTime1})
 }
 
 // ShowSQL show SQL statement or not on logger if log level is great than INFO
@@ -79,6 +96,11 @@ func (engine *Engine) SetLogger(logger core.ILogger) {
 	engine.dialect.SetLogger(logger)
 }
 
+// SetLogLevel sets the logger level
+func (engine *Engine) SetLogLevel(level core.LogLevel) {
+	engine.logger.SetLevel(level)
+}
+
 // SetDisableGlobalCache disable global cache or not
 func (engine *Engine) SetDisableGlobalCache(disable bool) {
 	if engine.disableGlobalCache != disable {
@@ -201,6 +223,11 @@ func (engine *Engine) SetDefaultCacher(cacher core.Cacher) {
 	engine.Cacher = cacher
 }
 
+// GetDefaultCacher returns the default cacher
+func (engine *Engine) GetDefaultCacher() core.Cacher {
+	return engine.Cacher
+}
+
 // NoCache If you has set default cacher, and you want temporilly stop use cache,
 // you can use NoCache()
 func (engine *Engine) NoCache() *Session {
@@ -736,6 +763,13 @@ func (engine *Engine) OrderBy(order string) *Session {
 	return session.OrderBy(order)
 }
 
+// Prepare enables prepare statement
+func (engine *Engine) Prepare() *Session {
+	session := engine.NewSession()
+	session.isAutoClose = true
+	return session.Prepare()
+}
+
 // Join the join_operator should be one of INNER, LEFT OUTER, CROSS etc - this will be prepended to JOIN
 func (engine *Engine) Join(joinOperator string, tablename interface{}, condition string, args ...interface{}) *Session {
 	session := engine.NewSession()
@@ -757,7 +791,8 @@ func (engine *Engine) Having(conditions string) *Session {
 	return session.Having(conditions)
 }
 
-func (engine *Engine) unMapType(t reflect.Type) {
+// UnMapType removes the datbase mapper of a type
+func (engine *Engine) UnMapType(t reflect.Type) {
 	engine.mutex.Lock()
 	defer engine.mutex.Unlock()
 	delete(engine.Tables, t)
@@ -914,7 +949,7 @@ func (engine *Engine) mapType(v reflect.Value) (*core.Table, error) {
 					}
 					if pStart > -1 {
 						if !strings.HasSuffix(k, ")") {
-							return nil, errors.New("cannot match ) charactor")
+							return nil, fmt.Errorf("field %s tag %s cannot match ) charactor", col.FieldName, key)
 						}
 
 						ctx.tagName = k[:pStart]
@@ -1341,24 +1376,24 @@ func (engine *Engine) Exec(sql string, args ...interface{}) (sql.Result, error)
 }
 
 // Query a raw sql and return records as []map[string][]byte
-func (engine *Engine) Query(sql string, paramStr ...interface{}) (resultsSlice []map[string][]byte, err error) {
+func (engine *Engine) Query(sqlorArgs ...interface{}) (resultsSlice []map[string][]byte, err error) {
 	session := engine.NewSession()
 	defer session.Close()
-	return session.Query(sql, paramStr...)
+	return session.Query(sqlorArgs...)
 }
 
 // QueryString runs a raw sql and return records as []map[string]string
-func (engine *Engine) QueryString(sqlStr string, args ...interface{}) ([]map[string]string, error) {
+func (engine *Engine) QueryString(sqlorArgs ...interface{}) ([]map[string]string, error) {
 	session := engine.NewSession()
 	defer session.Close()
-	return session.QueryString(sqlStr, args...)
+	return session.QueryString(sqlorArgs...)
 }
 
 // QueryInterface runs a raw sql and return records as []map[string]interface{}
-func (engine *Engine) QueryInterface(sqlStr string, args ...interface{}) ([]map[string]interface{}, error) {
+func (engine *Engine) QueryInterface(sqlorArgs ...interface{}) ([]map[string]interface{}, error) {
 	session := engine.NewSession()
 	defer session.Close()
-	return session.QueryInterface(sqlStr, args...)
+	return session.QueryInterface(sqlorArgs...)
 }
 
 // Insert one or more records
@@ -1564,24 +1599,39 @@ func (engine *Engine) formatTime(sqlTypeName string, t time.Time) (v interface{}
 	return
 }
 
-// Unscoped always disable struct tag "deleted"
-func (engine *Engine) Unscoped() *Session {
-	session := engine.NewSession()
-	session.isAutoClose = true
-	return session.Unscoped()
+// GetColumnMapper returns the column name mapper
+func (engine *Engine) GetColumnMapper() core.IMapper {
+	return engine.ColumnMapper
 }
 
-// CondDeleted returns the conditions whether a record is soft deleted.
-func (engine *Engine) CondDeleted(colName string) builder.Cond {
-	if engine.dialect.DBType() == core.MSSQL {
-		return builder.IsNull{colName}
-	}
-	return builder.IsNull{colName}.Or(builder.Eq{colName: zeroTime1})
+// GetTableMapper returns the table name mapper
+func (engine *Engine) GetTableMapper() core.IMapper {
+	return engine.TableMapper
 }
 
-// BufferSize sets buffer size for iterate
-func (engine *Engine) BufferSize(size int) *Session {
+// GetTZLocation returns time zone of the application
+func (engine *Engine) GetTZLocation() *time.Location {
+	return engine.TZLocation
+}
+
+// SetTZLocation sets time zone of the application
+func (engine *Engine) SetTZLocation(tz *time.Location) {
+	engine.TZLocation = tz
+}
+
+// GetTZDatabase returns time zone of the database
+func (engine *Engine) GetTZDatabase() *time.Location {
+	return engine.DatabaseTZ
+}
+
+// SetTZDatabase sets time zone of the database
+func (engine *Engine) SetTZDatabase(tz *time.Location) {
+	engine.DatabaseTZ = tz
+}
+
+// Unscoped always disable struct tag "deleted"
+func (engine *Engine) Unscoped() *Session {
 	session := engine.NewSession()
 	session.isAutoClose = true
-	return session.BufferSize(size)
+	return session.Unscoped()
 }
diff --git a/vendor/github.com/go-xorm/xorm/engine_group.go b/vendor/github.com/go-xorm/xorm/engine_group.go
new file mode 100644
index 0000000000..1de425f372
--- /dev/null
+++ b/vendor/github.com/go-xorm/xorm/engine_group.go
@@ -0,0 +1,194 @@
+// Copyright 2017 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"github.com/go-xorm/core"
+)
+
+// EngineGroup defines an engine group
+type EngineGroup struct {
+	*Engine
+	slaves []*Engine
+	policy GroupPolicy
+}
+
+// NewEngineGroup creates a new engine group
+func NewEngineGroup(args1 interface{}, args2 interface{}, policies ...GroupPolicy) (*EngineGroup, error) {
+	var eg EngineGroup
+	if len(policies) > 0 {
+		eg.policy = policies[0]
+	} else {
+		eg.policy = RoundRobinPolicy()
+	}
+
+	driverName, ok1 := args1.(string)
+	conns, ok2 := args2.([]string)
+	if ok1 && ok2 {
+		engines := make([]*Engine, len(conns))
+		for i, conn := range conns {
+			engine, err := NewEngine(driverName, conn)
+			if err != nil {
+				return nil, err
+			}
+			engine.engineGroup = &eg
+			engines[i] = engine
+		}
+
+		eg.Engine = engines[0]
+		eg.slaves = engines[1:]
+		return &eg, nil
+	}
+
+	master, ok3 := args1.(*Engine)
+	slaves, ok4 := args2.([]*Engine)
+	if ok3 && ok4 {
+		master.engineGroup = &eg
+		for i := 0; i < len(slaves); i++ {
+			slaves[i].engineGroup = &eg
+		}
+		eg.Engine = master
+		eg.slaves = slaves
+		return &eg, nil
+	}
+	return nil, ErrParamsType
+}
+
+// Close the engine
+func (eg *EngineGroup) Close() error {
+	err := eg.Engine.Close()
+	if err != nil {
+		return err
+	}
+
+	for i := 0; i < len(eg.slaves); i++ {
+		err := eg.slaves[i].Close()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// Master returns the master engine
+func (eg *EngineGroup) Master() *Engine {
+	return eg.Engine
+}
+
+// Ping tests if database is alive
+func (eg *EngineGroup) Ping() error {
+	if err := eg.Engine.Ping(); err != nil {
+		return err
+	}
+
+	for _, slave := range eg.slaves {
+		if err := slave.Ping(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// SetColumnMapper set the column name mapping rule
+func (eg *EngineGroup) SetColumnMapper(mapper core.IMapper) {
+	eg.Engine.ColumnMapper = mapper
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].ColumnMapper = mapper
+	}
+}
+
+// SetDefaultCacher set the default cacher
+func (eg *EngineGroup) SetDefaultCacher(cacher core.Cacher) {
+	eg.Engine.SetDefaultCacher(cacher)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetDefaultCacher(cacher)
+	}
+}
+
+// SetLogger set the new logger
+func (eg *EngineGroup) SetLogger(logger core.ILogger) {
+	eg.Engine.SetLogger(logger)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetLogger(logger)
+	}
+}
+
+// SetLogLevel sets the logger level
+func (eg *EngineGroup) SetLogLevel(level core.LogLevel) {
+	eg.Engine.SetLogLevel(level)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetLogLevel(level)
+	}
+}
+
+// SetMapper set the name mapping rules
+func (eg *EngineGroup) SetMapper(mapper core.IMapper) {
+	eg.Engine.SetMapper(mapper)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetMapper(mapper)
+	}
+}
+
+// SetMaxIdleConns set the max idle connections on pool, default is 2
+func (eg *EngineGroup) SetMaxIdleConns(conns int) {
+	eg.Engine.db.SetMaxIdleConns(conns)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].db.SetMaxIdleConns(conns)
+	}
+}
+
+// SetMaxOpenConns is only available for go 1.2+
+func (eg *EngineGroup) SetMaxOpenConns(conns int) {
+	eg.Engine.db.SetMaxOpenConns(conns)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].db.SetMaxOpenConns(conns)
+	}
+}
+
+// SetPolicy set the group policy
+func (eg *EngineGroup) SetPolicy(policy GroupPolicy) *EngineGroup {
+	eg.policy = policy
+	return eg
+}
+
+// SetTableMapper set the table name mapping rule
+func (eg *EngineGroup) SetTableMapper(mapper core.IMapper) {
+	eg.Engine.TableMapper = mapper
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].TableMapper = mapper
+	}
+}
+
+// ShowExecTime show SQL statement and execute time or not on logger if log level is great than INFO
+func (eg *EngineGroup) ShowExecTime(show ...bool) {
+	eg.Engine.ShowExecTime(show...)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].ShowExecTime(show...)
+	}
+}
+
+// ShowSQL show SQL statement or not on logger if log level is great than INFO
+func (eg *EngineGroup) ShowSQL(show ...bool) {
+	eg.Engine.ShowSQL(show...)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].ShowSQL(show...)
+	}
+}
+
+// Slave returns one of the physical databases which is a slave according the policy
+func (eg *EngineGroup) Slave() *Engine {
+	switch len(eg.slaves) {
+	case 0:
+		return eg.Engine
+	case 1:
+		return eg.slaves[0]
+	}
+	return eg.policy.Slave(eg)
+}
+
+// Slaves returns all the slaves
+func (eg *EngineGroup) Slaves() []*Engine {
+	return eg.slaves
+}
diff --git a/vendor/github.com/go-xorm/xorm/engine_group_policy.go b/vendor/github.com/go-xorm/xorm/engine_group_policy.go
new file mode 100644
index 0000000000..5b56e8995f
--- /dev/null
+++ b/vendor/github.com/go-xorm/xorm/engine_group_policy.go
@@ -0,0 +1,116 @@
+// Copyright 2017 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"math/rand"
+	"sync"
+	"time"
+)
+
+// GroupPolicy is be used by chosing the current slave from slaves
+type GroupPolicy interface {
+	Slave(*EngineGroup) *Engine
+}
+
+// GroupPolicyHandler should be used when a function is a GroupPolicy
+type GroupPolicyHandler func(*EngineGroup) *Engine
+
+// Slave implements the chosen of slaves
+func (h GroupPolicyHandler) Slave(eg *EngineGroup) *Engine {
+	return h(eg)
+}
+
+// RandomPolicy implmentes randomly chose the slave of slaves
+func RandomPolicy() GroupPolicyHandler {
+	var r = rand.New(rand.NewSource(time.Now().UnixNano()))
+	return func(g *EngineGroup) *Engine {
+		return g.Slaves()[r.Intn(len(g.Slaves()))]
+	}
+}
+
+// WeightRandomPolicy implmentes randomly chose the slave of slaves
+func WeightRandomPolicy(weights []int) GroupPolicyHandler {
+	var rands = make([]int, 0, len(weights))
+	for i := 0; i < len(weights); i++ {
+		for n := 0; n < weights[i]; n++ {
+			rands = append(rands, i)
+		}
+	}
+	var r = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	return func(g *EngineGroup) *Engine {
+		var slaves = g.Slaves()
+		idx := rands[r.Intn(len(rands))]
+		if idx >= len(slaves) {
+			idx = len(slaves) - 1
+		}
+		return slaves[idx]
+	}
+}
+
+func RoundRobinPolicy() GroupPolicyHandler {
+	var pos = -1
+	var lock sync.Mutex
+	return func(g *EngineGroup) *Engine {
+		var slaves = g.Slaves()
+
+		lock.Lock()
+		defer lock.Unlock()
+		pos++
+		if pos >= len(slaves) {
+			pos = 0
+		}
+
+		return slaves[pos]
+	}
+}
+
+func WeightRoundRobinPolicy(weights []int) GroupPolicyHandler {
+	var rands = make([]int, 0, len(weights))
+	for i := 0; i < len(weights); i++ {
+		for n := 0; n < weights[i]; n++ {
+			rands = append(rands, i)
+		}
+	}
+	var pos = -1
+	var lock sync.Mutex
+
+	return func(g *EngineGroup) *Engine {
+		var slaves = g.Slaves()
+		lock.Lock()
+		defer lock.Unlock()
+		pos++
+		if pos >= len(rands) {
+			pos = 0
+		}
+
+		idx := rands[pos]
+		if idx >= len(slaves) {
+			idx = len(slaves) - 1
+		}
+		return slaves[idx]
+	}
+}
+
+// LeastConnPolicy implements GroupPolicy, every time will get the least connections slave
+func LeastConnPolicy() GroupPolicyHandler {
+	return func(g *EngineGroup) *Engine {
+		var slaves = g.Slaves()
+		connections := 0
+		idx := 0
+		for i := 0; i < len(slaves); i++ {
+			openConnections := slaves[i].DB().Stats().OpenConnections
+			if i == 0 {
+				connections = openConnections
+				idx = i
+			} else if openConnections <= connections {
+				connections = openConnections
+				idx = i
+			}
+		}
+		return slaves[idx]
+	}
+}
diff --git a/vendor/github.com/go-xorm/xorm/engine_maxlife.go b/vendor/github.com/go-xorm/xorm/engine_maxlife.go
index 21daeaa1b8..22666c5f44 100644
--- a/vendor/github.com/go-xorm/xorm/engine_maxlife.go
+++ b/vendor/github.com/go-xorm/xorm/engine_maxlife.go
@@ -12,3 +12,11 @@ import "time"
 func (engine *Engine) SetConnMaxLifetime(d time.Duration) {
 	engine.db.SetConnMaxLifetime(d)
 }
+
+// SetConnMaxLifetime sets the maximum amount of time a connection may be reused.
+func (eg *EngineGroup) SetConnMaxLifetime(d time.Duration) {
+	eg.Engine.SetConnMaxLifetime(d)
+	for i := 0; i < len(eg.slaves); i++ {
+		eg.slaves[i].SetConnMaxLifetime(d)
+	}
+}
diff --git a/vendor/github.com/go-xorm/xorm/error.go b/vendor/github.com/go-xorm/xorm/error.go
index 2a334f47c2..cfeefc31e8 100644
--- a/vendor/github.com/go-xorm/xorm/error.go
+++ b/vendor/github.com/go-xorm/xorm/error.go
@@ -23,4 +23,6 @@ var (
 	ErrNeedDeletedCond = errors.New("Delete need at least one condition")
 	// ErrNotImplemented not implemented
 	ErrNotImplemented = errors.New("Not implemented")
+	// ErrConditionType condition type unsupported
+	ErrConditionType = errors.New("Unsupported conditon type")
 )
diff --git a/vendor/github.com/go-xorm/xorm/interface.go b/vendor/github.com/go-xorm/xorm/interface.go
new file mode 100644
index 0000000000..9a3b6da0b2
--- /dev/null
+++ b/vendor/github.com/go-xorm/xorm/interface.go
@@ -0,0 +1,103 @@
+// Copyright 2017 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+import (
+	"database/sql"
+	"reflect"
+	"time"
+
+	"github.com/go-xorm/core"
+)
+
+// Interface defines the interface which Engine, EngineGroup and Session will implementate.
+type Interface interface {
+	AllCols() *Session
+	Alias(alias string) *Session
+	Asc(colNames ...string) *Session
+	BufferSize(size int) *Session
+	Cols(columns ...string) *Session
+	Count(...interface{}) (int64, error)
+	CreateIndexes(bean interface{}) error
+	CreateUniques(bean interface{}) error
+	Decr(column string, arg ...interface{}) *Session
+	Desc(...string) *Session
+	Delete(interface{}) (int64, error)
+	Distinct(columns ...string) *Session
+	DropIndexes(bean interface{}) error
+	Exec(string, ...interface{}) (sql.Result, error)
+	Exist(bean ...interface{}) (bool, error)
+	Find(interface{}, ...interface{}) error
+	Get(interface{}) (bool, error)
+	GroupBy(keys string) *Session
+	ID(interface{}) *Session
+	In(string, ...interface{}) *Session
+	Incr(column string, arg ...interface{}) *Session
+	Insert(...interface{}) (int64, error)
+	InsertOne(interface{}) (int64, error)
+	IsTableEmpty(bean interface{}) (bool, error)
+	IsTableExist(beanOrTableName interface{}) (bool, error)
+	Iterate(interface{}, IterFunc) error
+	Limit(int, ...int) *Session
+	NoAutoCondition(...bool) *Session
+	NotIn(string, ...interface{}) *Session
+	Join(joinOperator string, tablename interface{}, condition string, args ...interface{}) *Session
+	Omit(columns ...string) *Session
+	OrderBy(order string) *Session
+	Ping() error
+	Query(sqlOrAgrs ...interface{}) (resultsSlice []map[string][]byte, err error)
+	QueryInterface(sqlorArgs ...interface{}) ([]map[string]interface{}, error)
+	QueryString(sqlorArgs ...interface{}) ([]map[string]string, error)
+	Rows(bean interface{}) (*Rows, error)
+	SetExpr(string, string) *Session
+	SQL(interface{}, ...interface{}) *Session
+	Sum(bean interface{}, colName string) (float64, error)
+	SumInt(bean interface{}, colName string) (int64, error)
+	Sums(bean interface{}, colNames ...string) ([]float64, error)
+	SumsInt(bean interface{}, colNames ...string) ([]int64, error)
+	Table(tableNameOrBean interface{}) *Session
+	Unscoped() *Session
+	Update(bean interface{}, condiBeans ...interface{}) (int64, error)
+	UseBool(...string) *Session
+	Where(interface{}, ...interface{}) *Session
+}
+
+// EngineInterface defines the interface which Engine, EngineGroup will implementate.
+type EngineInterface interface {
+	Interface
+
+	Before(func(interface{})) *Session
+	Charset(charset string) *Session
+	CreateTables(...interface{}) error
+	DBMetas() ([]*core.Table, error)
+	Dialect() core.Dialect
+	DropTables(...interface{}) error
+	DumpAllToFile(fp string, tp ...core.DbType) error
+	GetColumnMapper() core.IMapper
+	GetDefaultCacher() core.Cacher
+	GetTableMapper() core.IMapper
+	GetTZDatabase() *time.Location
+	GetTZLocation() *time.Location
+	NewSession() *Session
+	NoAutoTime() *Session
+	Quote(string) string
+	SetDefaultCacher(core.Cacher)
+	SetLogLevel(core.LogLevel)
+	SetMapper(core.IMapper)
+	SetTZDatabase(tz *time.Location)
+	SetTZLocation(tz *time.Location)
+	ShowSQL(show ...bool)
+	Sync(...interface{}) error
+	Sync2(...interface{}) error
+	StoreEngine(storeEngine string) *Session
+	TableInfo(bean interface{}) *Table
+	UnMapType(reflect.Type)
+}
+
+var (
+	_ Interface       = &Session{}
+	_ EngineInterface = &Engine{}
+	_ EngineInterface = &EngineGroup{}
+)
diff --git a/vendor/github.com/go-xorm/xorm/session.go b/vendor/github.com/go-xorm/xorm/session.go
index ed25205880..5c6cb5f9de 100644
--- a/vendor/github.com/go-xorm/xorm/session.go
+++ b/vendor/github.com/go-xorm/xorm/session.go
@@ -76,6 +76,7 @@ func (session *Session) Init() {
 	session.afterDeleteBeans = make(map[interface{}]*[]func(interface{}), 0)
 	session.beforeClosures = make([]func(interface{}), 0)
 	session.afterClosures = make([]func(interface{}), 0)
+	session.stmtCache = make(map[uint32]*core.Stmt)
 
 	session.afterProcessors = make([]executedProcessor, 0)
 
@@ -262,13 +263,13 @@ func (session *Session) canCache() bool {
 	return true
 }
 
-func (session *Session) doPrepare(sqlStr string) (stmt *core.Stmt, err error) {
+func (session *Session) doPrepare(db *core.DB, sqlStr string) (stmt *core.Stmt, err error) {
 	crc := crc32.ChecksumIEEE([]byte(sqlStr))
 	// TODO try hash(sqlStr+len(sqlStr))
 	var has bool
 	stmt, has = session.stmtCache[crc]
 	if !has {
-		stmt, err = session.DB().Prepare(sqlStr)
+		stmt, err = db.Prepare(sqlStr)
 		if err != nil {
 			return nil, err
 		}
@@ -461,6 +462,10 @@ func (session *Session) slice2Bean(scanResults []interface{}, fields []string, b
 				hasAssigned = true
 
 				if len(bs) > 0 {
+					if fieldType.Kind() == reflect.String {
+						fieldValue.SetString(string(bs))
+						continue
+					}
 					if fieldValue.CanAddr() {
 						err := json.Unmarshal(bs, fieldValue.Addr().Interface())
 						if err != nil {
diff --git a/vendor/github.com/go-xorm/xorm/session_convert.go b/vendor/github.com/go-xorm/xorm/session_convert.go
index f2c949bac8..1f9d8aa1bd 100644
--- a/vendor/github.com/go-xorm/xorm/session_convert.go
+++ b/vendor/github.com/go-xorm/xorm/session_convert.go
@@ -34,27 +34,27 @@ func (session *Session) str2Time(col *core.Column, data string) (outTime time.Ti
 		sd, err := strconv.ParseInt(sdata, 10, 64)
 		if err == nil {
 			x = time.Unix(sd, 0)
-			session.engine.logger.Debugf("time(0) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+			//session.engine.logger.Debugf("time(0) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 		} else {
-			session.engine.logger.Debugf("time(0) err key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+			//session.engine.logger.Debugf("time(0) err key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 		}
 	} else if len(sdata) > 19 && strings.Contains(sdata, "-") {
 		x, err = time.ParseInLocation(time.RFC3339Nano, sdata, parseLoc)
 		session.engine.logger.Debugf("time(1) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 		if err != nil {
 			x, err = time.ParseInLocation("2006-01-02 15:04:05.999999999", sdata, parseLoc)
-			session.engine.logger.Debugf("time(2) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+			//session.engine.logger.Debugf("time(2) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 		}
 		if err != nil {
 			x, err = time.ParseInLocation("2006-01-02 15:04:05.9999999 Z07:00", sdata, parseLoc)
-			session.engine.logger.Debugf("time(3) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+			//session.engine.logger.Debugf("time(3) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 		}
 	} else if len(sdata) == 19 && strings.Contains(sdata, "-") {
 		x, err = time.ParseInLocation("2006-01-02 15:04:05", sdata, parseLoc)
-		session.engine.logger.Debugf("time(4) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+		//session.engine.logger.Debugf("time(4) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 	} else if len(sdata) == 10 && sdata[4] == '-' && sdata[7] == '-' {
 		x, err = time.ParseInLocation("2006-01-02", sdata, parseLoc)
-		session.engine.logger.Debugf("time(5) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+		//session.engine.logger.Debugf("time(5) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 	} else if col.SQLType.Name == core.Time {
 		if strings.Contains(sdata, " ") {
 			ssd := strings.Split(sdata, " ")
@@ -68,7 +68,7 @@ func (session *Session) str2Time(col *core.Column, data string) (outTime time.Ti
 
 		st := fmt.Sprintf("2006-01-02 %v", sdata)
 		x, err = time.ParseInLocation("2006-01-02 15:04:05", st, parseLoc)
-		session.engine.logger.Debugf("time(6) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
+		//session.engine.logger.Debugf("time(6) key[%v]: %+v | sdata: [%v]\n", col.FieldName, x, sdata)
 	} else {
 		outErr = fmt.Errorf("unsupported time format %v", sdata)
 		return
diff --git a/vendor/github.com/go-xorm/xorm/session_exist.go b/vendor/github.com/go-xorm/xorm/session_exist.go
index 049c1ddff1..378a648376 100644
--- a/vendor/github.com/go-xorm/xorm/session_exist.go
+++ b/vendor/github.com/go-xorm/xorm/session_exist.go
@@ -10,6 +10,7 @@ import (
 	"reflect"
 
 	"github.com/go-xorm/builder"
+	"github.com/go-xorm/core"
 )
 
 // Exist returns true if the record exist otherwise return false
@@ -35,10 +36,18 @@ func (session *Session) Exist(bean ...interface{}) (bool, error) {
 					return false, err
 				}
 
-				sqlStr = fmt.Sprintf("SELECT * FROM %s WHERE %s LIMIT 1", tableName, condSQL)
+				if session.engine.dialect.DBType() == core.MSSQL {
+					sqlStr = fmt.Sprintf("SELECT top 1 * FROM %s WHERE %s", tableName, condSQL)
+				} else {
+					sqlStr = fmt.Sprintf("SELECT * FROM %s WHERE %s LIMIT 1", tableName, condSQL)
+				}
 				args = condArgs
 			} else {
-				sqlStr = fmt.Sprintf("SELECT * FROM %s LIMIT 1", tableName)
+				if session.engine.dialect.DBType() == core.MSSQL {
+					sqlStr = fmt.Sprintf("SELECT top 1 * FROM %s", tableName)
+				} else {
+					sqlStr = fmt.Sprintf("SELECT * FROM %s LIMIT 1", tableName)
+				}
 				args = []interface{}{}
 			}
 		} else {
diff --git a/vendor/github.com/go-xorm/xorm/session_get.go b/vendor/github.com/go-xorm/xorm/session_get.go
index 8faf53c02c..68b37af7f1 100644
--- a/vendor/github.com/go-xorm/xorm/session_get.go
+++ b/vendor/github.com/go-xorm/xorm/session_get.go
@@ -5,6 +5,7 @@
 package xorm
 
 import (
+	"database/sql"
 	"errors"
 	"reflect"
 	"strconv"
@@ -79,6 +80,13 @@ func (session *Session) nocacheGet(beanKind reflect.Kind, table *core.Table, bea
 		return false, nil
 	}
 
+	switch bean.(type) {
+	case sql.NullInt64, sql.NullBool, sql.NullFloat64, sql.NullString:
+		return true, rows.Scan(&bean)
+	case *sql.NullInt64, *sql.NullBool, *sql.NullFloat64, *sql.NullString:
+		return true, rows.Scan(bean)
+	}
+
 	switch beanKind {
 	case reflect.Struct:
 		fields, err := rows.Columns()
diff --git a/vendor/github.com/go-xorm/xorm/session_insert.go b/vendor/github.com/go-xorm/xorm/session_insert.go
index 478501f0b2..129ee23098 100644
--- a/vendor/github.com/go-xorm/xorm/session_insert.go
+++ b/vendor/github.com/go-xorm/xorm/session_insert.go
@@ -400,7 +400,7 @@ func (session *Session) innerInsert(bean interface{}) (int64, error) {
 			return 0, err
 		}
 
-		handleAfterInsertProcessorFunc(bean)
+		defer handleAfterInsertProcessorFunc(bean)
 
 		if cacher := session.engine.getCacher2(table); cacher != nil && session.statement.UseCache {
 			session.cacheInsert(table, tableName)
@@ -445,7 +445,7 @@ func (session *Session) innerInsert(bean interface{}) (int64, error) {
 		if err != nil {
 			return 0, err
 		}
-		handleAfterInsertProcessorFunc(bean)
+		defer handleAfterInsertProcessorFunc(bean)
 
 		if cacher := session.engine.getCacher2(table); cacher != nil && session.statement.UseCache {
 			session.cacheInsert(table, tableName)
diff --git a/vendor/github.com/go-xorm/xorm/session_query.go b/vendor/github.com/go-xorm/xorm/session_query.go
index a693bace3f..f8098f849c 100644
--- a/vendor/github.com/go-xorm/xorm/session_query.go
+++ b/vendor/github.com/go-xorm/xorm/session_query.go
@@ -8,17 +8,92 @@ import (
 	"fmt"
 	"reflect"
 	"strconv"
+	"strings"
 	"time"
 
+	"github.com/go-xorm/builder"
 	"github.com/go-xorm/core"
 )
 
+func (session *Session) genQuerySQL(sqlorArgs ...interface{}) (string, []interface{}, error) {
+	if len(sqlorArgs) > 0 {
+		switch sqlorArgs[0].(type) {
+		case string:
+			return sqlorArgs[0].(string), sqlorArgs[1:], nil
+		case *builder.Builder:
+			return sqlorArgs[0].(*builder.Builder).ToSQL()
+		case builder.Builder:
+			bd := sqlorArgs[0].(builder.Builder)
+			return bd.ToSQL()
+		default:
+			return "", nil, ErrUnSupportedType
+		}
+	}
+
+	if session.statement.RawSQL != "" {
+		return session.statement.RawSQL, session.statement.RawParams, nil
+	}
+
+	if len(session.statement.TableName()) <= 0 {
+		return "", nil, ErrTableNotFound
+	}
+
+	var columnStr = session.statement.ColumnStr
+	if len(session.statement.selectStr) > 0 {
+		columnStr = session.statement.selectStr
+	} else {
+		if session.statement.JoinStr == "" {
+			if columnStr == "" {
+				if session.statement.GroupByStr != "" {
+					columnStr = session.statement.Engine.Quote(strings.Replace(session.statement.GroupByStr, ",", session.engine.Quote(","), -1))
+				} else {
+					columnStr = session.statement.genColumnStr()
+				}
+			}
+		} else {
+			if columnStr == "" {
+				if session.statement.GroupByStr != "" {
+					columnStr = session.statement.Engine.Quote(strings.Replace(session.statement.GroupByStr, ",", session.engine.Quote(","), -1))
+				} else {
+					columnStr = "*"
+				}
+			}
+		}
+		if columnStr == "" {
+			columnStr = "*"
+		}
+	}
+
+	condSQL, condArgs, err := builder.ToSQL(session.statement.cond)
+	if err != nil {
+		return "", nil, err
+	}
+
+	args := append(session.statement.joinArgs, condArgs...)
+	sqlStr, err := session.statement.genSelectSQL(columnStr, condSQL)
+	if err != nil {
+		return "", nil, err
+	}
+	// for mssql and use limit
+	qs := strings.Count(sqlStr, "?")
+	if len(args)*2 == qs {
+		args = append(args, args...)
+	}
+
+	return sqlStr, args, nil
+}
+
 // Query runs a raw sql and return records as []map[string][]byte
-func (session *Session) Query(sqlStr string, args ...interface{}) ([]map[string][]byte, error) {
+func (session *Session) Query(sqlorArgs ...interface{}) ([]map[string][]byte, error) {
 	if session.isAutoClose {
 		defer session.Close()
 	}
 
+	sqlStr, args, err := session.genQuerySQL(sqlorArgs...)
+	if err != nil {
+		return nil, err
+	}
+
 	return session.queryBytes(sqlStr, args...)
 }
 
@@ -114,11 +189,16 @@ func rows2Strings(rows *core.Rows) (resultsSlice []map[string]string, err error)
 }
 
 // QueryString runs a raw sql and return records as []map[string]string
-func (session *Session) QueryString(sqlStr string, args ...interface{}) ([]map[string]string, error) {
+func (session *Session) QueryString(sqlorArgs ...interface{}) ([]map[string]string, error) {
 	if session.isAutoClose {
 		defer session.Close()
 	}
 
+	sqlStr, args, err := session.genQuerySQL(sqlorArgs...)
+	if err != nil {
+		return nil, err
+	}
+
 	rows, err := session.queryRows(sqlStr, args...)
 	if err != nil {
 		return nil, err
@@ -162,11 +242,16 @@ func rows2Interfaces(rows *core.Rows) (resultsSlice []map[string]interface{}, er
 }
 
 // QueryInterface runs a raw sql and return records as []map[string]interface{}
-func (session *Session) QueryInterface(sqlStr string, args ...interface{}) ([]map[string]interface{}, error) {
+func (session *Session) QueryInterface(sqlorArgs ...interface{}) ([]map[string]interface{}, error) {
 	if session.isAutoClose {
 		defer session.Close()
 	}
 
+	sqlStr, args, err := session.genQuerySQL(sqlorArgs...)
+	if err != nil {
+		return nil, err
+	}
+
 	rows, err := session.queryRows(sqlStr, args...)
 	if err != nil {
 		return nil, err
diff --git a/vendor/github.com/go-xorm/xorm/session_raw.go b/vendor/github.com/go-xorm/xorm/session_raw.go
index c225598e60..69bf9b3c6b 100644
--- a/vendor/github.com/go-xorm/xorm/session_raw.go
+++ b/vendor/github.com/go-xorm/xorm/session_raw.go
@@ -47,9 +47,16 @@ func (session *Session) queryRows(sqlStr string, args ...interface{}) (*core.Row
 	}
 
 	if session.isAutoCommit {
+		var db *core.DB
+		if session.engine.engineGroup != nil {
+			db = session.engine.engineGroup.Slave().DB()
+		} else {
+			db = session.DB()
+		}
+
 		if session.prepareStmt {
 			// don't clear stmt since session will cache them
-			stmt, err := session.doPrepare(sqlStr)
+			stmt, err := session.doPrepare(db, sqlStr)
 			if err != nil {
 				return nil, err
 			}
@@ -61,7 +68,7 @@ func (session *Session) queryRows(sqlStr string, args ...interface{}) (*core.Row
 			return rows, nil
 		}
 
-		rows, err := session.DB().Query(sqlStr, args...)
+		rows, err := db.Query(sqlStr, args...)
 		if err != nil {
 			return nil, err
 		}
@@ -171,7 +178,7 @@ func (session *Session) exec(sqlStr string, args ...interface{}) (sql.Result, er
 	}
 
 	if session.prepareStmt {
-		stmt, err := session.doPrepare(sqlStr)
+		stmt, err := session.doPrepare(session.DB(), sqlStr)
 		if err != nil {
 			return nil, err
 		}
diff --git a/vendor/github.com/go-xorm/xorm/session_update.go b/vendor/github.com/go-xorm/xorm/session_update.go
index ca06298122..f558745667 100644
--- a/vendor/github.com/go-xorm/xorm/session_update.go
+++ b/vendor/github.com/go-xorm/xorm/session_update.go
@@ -242,10 +242,23 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 
 	var autoCond builder.Cond
 	if !session.statement.noAutoCondition && len(condiBean) > 0 {
-		var err error
-		autoCond, err = session.statement.buildConds(session.statement.RefTable, condiBean[0], true, true, false, true, false)
-		if err != nil {
-			return 0, err
+		if c, ok := condiBean[0].(map[string]interface{}); ok {
+			autoCond = builder.Eq(c)
+		} else {
+			ct := reflect.TypeOf(condiBean[0])
+			k := ct.Kind()
+			if k == reflect.Ptr {
+				k = ct.Elem().Kind()
+			}
+			if k == reflect.Struct {
+				var err error
+				autoCond, err = session.statement.buildConds(session.statement.RefTable, condiBean[0], true, true, false, true, false)
+				if err != nil {
+					return 0, err
+				}
+			} else {
+				return 0, ErrConditionType
+			}
 		}
 	}
 
diff --git a/vendor/github.com/go-xorm/xorm/statement.go b/vendor/github.com/go-xorm/xorm/statement.go
index 23346c7103..6400425b20 100644
--- a/vendor/github.com/go-xorm/xorm/statement.go
+++ b/vendor/github.com/go-xorm/xorm/statement.go
@@ -160,6 +160,9 @@ func (statement *Statement) And(query interface{}, args ...interface{}) *Stateme
 	case string:
 		cond := builder.Expr(query.(string), args...)
 		statement.cond = statement.cond.And(cond)
+	case map[string]interface{}:
+		cond := builder.Eq(query.(map[string]interface{}))
+		statement.cond = statement.cond.And(cond)
 	case builder.Cond:
 		cond := query.(builder.Cond)
 		statement.cond = statement.cond.And(cond)
@@ -181,6 +184,9 @@ func (statement *Statement) Or(query interface{}, args ...interface{}) *Statemen
 	case string:
 		cond := builder.Expr(query.(string), args...)
 		statement.cond = statement.cond.Or(cond)
+	case map[string]interface{}:
+		cond := builder.Eq(query.(map[string]interface{}))
+		statement.cond = statement.cond.Or(cond)
 	case builder.Cond:
 		cond := query.(builder.Cond)
 		statement.cond = statement.cond.Or(cond)
@@ -901,8 +907,12 @@ func (statement *Statement) genDelIndexSQL() []string {
 
 func (statement *Statement) genAddColumnStr(col *core.Column) (string, []interface{}) {
 	quote := statement.Engine.Quote
-	sql := fmt.Sprintf("ALTER TABLE %v ADD %v;", quote(statement.TableName()),
+	sql := fmt.Sprintf("ALTER TABLE %v ADD %v", quote(statement.TableName()),
 		col.String(statement.Engine.dialect))
+	if statement.Engine.dialect.DBType() == core.MYSQL && len(col.Comment) > 0 {
+		sql += " COMMENT '" + col.Comment + "'"
+	}
+	sql += ";"
 	return sql, []interface{}{}
 }
 
diff --git a/vendor/vendor.json b/vendor/vendor.json
index e008169262..a108bbbabb 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -462,16 +462,16 @@
 			"revisionTime": "2016-11-01T11:13:14Z"
 		},
 		{
-			"checksumSHA1": "9SXbj96wb1PgppBZzxMIN0axbFQ=",
+			"checksumSHA1": "HsUSlgz1VKEEiZdkXY5qdLzexWU=",
 			"path": "github.com/go-xorm/builder",
-			"revision": "c8871c857d2555fbfbd8524f895be5386d3d8836",
-			"revisionTime": "2017-05-19T03:21:30Z"
+			"revision": "488224409dd8aa2ce7a5baf8d10d55764a913738",
+			"revisionTime": "2018-01-16T06:54:19Z"
 		},
 		{
-			"checksumSHA1": "HMavuxvDhKOwmbbFnYt9hfT6jE0=",
+			"checksumSHA1": "7JjlvSpGfLa49MHElks8NGBUfFA=",
 			"path": "github.com/go-xorm/core",
-			"revision": "da1adaf7a28ca792961721a34e6e04945200c890",
-			"revisionTime": "2017-09-09T08:56:53Z"
+			"revision": "cb1d0ca71f42d3ee1bf4aba7daa16099bc31a7e9",
+			"revisionTime": "2017-12-21T01:38:49Z"
 		},
 		{
 			"checksumSHA1": "k52lEKLp8j5M+jFpe+3u+bIFpxQ=",
@@ -480,10 +480,10 @@
 			"revisionTime": "2016-08-11T02:11:45Z"
 		},
 		{
-			"checksumSHA1": "+KmPfckyKvrUZPIHBYHylg/7V8o=",
+			"checksumSHA1": "eGBz6F3I/0naVUclZ6GZWc3EzQo=",
 			"path": "github.com/go-xorm/xorm",
-			"revision": "29d4a0330a00b9be468b70e3fb0f74109348c358",
-			"revisionTime": "2017-09-30T01:26:13Z"
+			"revision": "d4149d1eee0c2c488a74a5863fd9caf13d60fd03",
+			"revisionTime": "2018-01-22T13:32:35Z"
 		},
 		{
 			"checksumSHA1": "1ft/4j5MFa7C9dPI9whL03HSUzk=",