Lightweight and fast SQL builder for Go language
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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 (
"fmt"
"sort"
)
// Neq defines not equal conditions
type Neq map[string]interface{}
var _ Cond = Neq{}
// WriteTo writes SQL to Writer
func (neq Neq) WriteTo(w Writer) error {
var args = make([]interface{}, 0, len(neq))
var i = 0
for _, k := range neq.sortedKeys() {
v := neq[k]
switch v.(type) {
case []int, []int64, []string, []int32, []int16, []int8:
if err := NotIn(k, v).WriteTo(w); err != nil {
return err
}
case expr:
if _, err := fmt.Fprintf(w, "%s<>(", k); err != nil {
return err
}
if err := v.(expr).WriteTo(w); err != nil {
return err
}
if _, err := fmt.Fprintf(w, ")"); err != nil {
return err
}
case *Builder:
if _, err := fmt.Fprintf(w, "%s<>(", k); err != nil {
return err
}
if err := v.(*Builder).WriteTo(w); err != nil {
return err
}
if _, err := fmt.Fprintf(w, ")"); err != nil {
return err
}
default:
if _, err := fmt.Fprintf(w, "%s<>?", k); err != nil {
return err
}
args = append(args, v)
}
if i != len(neq)-1 {
if _, err := fmt.Fprint(w, " AND "); err != nil {
return err
}
}
i = i + 1
}
w.Append(args...)
return nil
}
// And implements And with other conditions
func (neq Neq) And(conds ...Cond) Cond {
return And(neq, And(conds...))
}
// Or implements Or with other conditions
func (neq Neq) Or(conds ...Cond) Cond {
return Or(neq, Or(conds...))
}
// IsValid tests if this condition is valid
func (neq Neq) IsValid() bool {
return len(neq) > 0
}
// sortedKeys returns all keys of this Neq sorted with sort.Strings.
// It is used internally for consistent ordering when generating
// SQL, see https://gitea.com/xorm/builder/issues/10
func (neq Neq) sortedKeys() []string {
keys := make([]string, 0, len(neq))
for key := range neq {
keys = append(keys, key)
}
sort.Strings(keys)
return keys
}