50 lines
1.0 KiB
Go
50 lines
1.0 KiB
Go
|
// Copyright 2022 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 (
|
||
|
|
"errors"
|
||
|
|
"io"
|
||
|
|
)
|
||
|
|
|
||
|
|
type condNotExists struct {
|
||
|
|
subQuery *Builder
|
||
|
|
}
|
||
|
|
|
||
|
|
var _ Cond = condNotExists{}
|
||
|
|
|
||
|
|
// NotExists returns Cond via condition
|
||
|
|
func NotExists(subQuery *Builder) Cond {
|
||
|
|
return &condNotExists{
|
||
|
|
subQuery: subQuery,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (condNotExists condNotExists) WriteTo(w Writer) error {
|
||
|
|
if !condNotExists.IsValid() {
|
||
|
|
return errors.New("exists condition is nov valid")
|
||
|
|
}
|
||
|
|
if _, err := io.WriteString(w, "NOT EXISTS ("); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
if err := condNotExists.subQuery.WriteTo(w); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
_, err := io.WriteString(w, ")")
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
func (condNotExists condNotExists) And(conds ...Cond) Cond {
|
||
|
|
return And(condNotExists, And(conds...))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (condNotExists condNotExists) Or(conds ...Cond) Cond {
|
||
|
|
return Or(condNotExists, Or(conds...))
|
||
|
|
}
|
||
|
|
|
||
|
|
func (condNotExists condNotExists) IsValid() bool {
|
||
|
|
return condNotExists.subQuery != nil
|
||
|
|
}
|