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// Copyright 2016 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 builder
import (
"bytes"
"fmt"
)
// Insert creates an insert Builder
func Insert(eq ...interface{}) *Builder {
builder := &Builder{cond: NewCond()}
return builder.Insert(eq...)
}
func (b *Builder) insertSelectWriteTo(w Writer) error {
if _, err := fmt.Fprintf(w, "INSERT INTO %s ", b.into); err != nil {
return err
}
if len(b.insertCols) > 0 {
fmt.Fprintf(w, "(")
for _, col := range b.insertCols {
fmt.Fprintf(w, col)
}
fmt.Fprintf(w, ") ")
}
return b.selectWriteTo(w)
}
func (b *Builder) insertWriteTo(w Writer) error {
if len(b.into) <= 0 {
return ErrNoTableName
}
if len(b.insertCols) <= 0 && b.from == "" {
return ErrNoColumnToInsert
}
if b.into != "" && b.from != "" {
return b.insertSelectWriteTo(w)
}
if _, err := fmt.Fprintf(w, "INSERT INTO %s (", b.into); err != nil {
return err
}
var args = make([]interface{}, 0)
var bs []byte
var valBuffer = bytes.NewBuffer(bs)
for i, col := range b.insertCols {
value := b.insertVals[i]
fmt.Fprint(w, col)
if e, ok := value.(expr); ok {
fmt.Fprintf(valBuffer, "(%s)", e.sql)
args = append(args, e.args...)
} else {
fmt.Fprint(valBuffer, "?")
args = append(args, value)
}
if i != len(b.insertCols)-1 {
if _, err := fmt.Fprint(w, ","); err != nil {
return err
}
if _, err := fmt.Fprint(valBuffer, ","); err != nil {
return err
}
}
}
if _, err := fmt.Fprint(w, ") Values ("); err != nil {
return err
}
if _, err := w.Write(valBuffer.Bytes()); err != nil {
return err
}
if _, err := fmt.Fprint(w, ")"); err != nil {
return err
}
w.Append(args...)
return nil
}
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