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"
type condOr []Cond
var _ Cond = condOr{}
// Or sets OR conditions
func Or(conds ...Cond) Cond {
var result = make(condOr, 0, len(conds))
for _, cond := range conds {
if cond == nil || !cond.IsValid() {
continue
}
result = append(result, cond)
}
return result
}
// WriteTo implments Cond
func (o condOr) WriteTo(w Writer) error {
for i, cond := range o {
var needQuote bool
switch cond.(type) {
case condAnd, expr:
needQuote = true
case Eq:
needQuote = (len(cond.(Eq)) > 1)
case Neq:
needQuote = (len(cond.(Neq)) > 1)
}
if needQuote {
fmt.Fprint(w, "(")
}
err := cond.WriteTo(w)
if err != nil {
return err
}
if needQuote {
fmt.Fprint(w, ")")
}
if i != len(o)-1 {
fmt.Fprint(w, " OR ")
}
}
return nil
}
func (o condOr) And(conds ...Cond) Cond {
return And(o, And(conds...))
}
func (o condOr) Or(conds ...Cond) Cond {
return Or(o, Or(conds...))
}
func (o condOr) IsValid() bool {
return len(o) > 0
}