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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package db
import (
"code.gitea.io/gitea/modules/setting"
"xorm.io/builder"
"xorm.io/xorm"
)
// Context represents a db context
type Context struct {
e Engine
}
// Engine returns db engine
func (ctx *Context) Engine() Engine {
return ctx.e
}
// NewSession returns a new session
func (ctx *Context) NewSession() *xorm.Session {
e, ok := ctx.e.(*xorm.Engine)
if ok {
return e.NewSession()
}
return nil
}
// DefaultContext represents a Context with default Engine
func DefaultContext() *Context {
return &Context{x}
}
// Committer represents an interface to Commit or Close the Context
type Committer interface {
Commit() error
Close() error
}
// TxContext represents a transaction Context
func TxContext() (*Context, Committer, error) {
sess := x.NewSession()
if err := sess.Begin(); err != nil {
sess.Close()
return nil, nil, err
}
return &Context{sess}, sess, nil
}
// WithContext represents executing database operations
func WithContext(f func(ctx *Context) error) error {
return f(&Context{x})
}
// WithTx represents executing database operations on a transaction
func WithTx(f func(ctx *Context) error) error {
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
if err := f(&Context{sess}); err != nil {
return err
}
return sess.Commit()
}
// Iterate iterates the databases and doing something
func Iterate(ctx *Context, tableBean interface{}, cond builder.Cond, fun func(idx int, bean interface{}) error) error {
return ctx.e.Where(cond).
BufferSize(setting.Database.IterateBufferSize).
Iterate(tableBean, fun)
}
// Insert inserts records into database
func Insert(ctx *Context, beans ...interface{}) error {
_, err := ctx.e.Insert(beans...)
return err
}
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