mirror of
https://github.com/astaxie/beego.git
synced 2024-12-27 18:45:47 +00:00
117 lines
3.1 KiB
Go
117 lines
3.1 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package orm
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
// ExprSep define the expression separation
|
|
const (
|
|
ExprSep = "__"
|
|
)
|
|
|
|
type condValue struct {
|
|
exprs []string
|
|
args []interface{}
|
|
cond *Condition
|
|
isOr bool
|
|
isNot bool
|
|
isCond bool
|
|
}
|
|
|
|
// Condition struct.
|
|
// work for WHERE conditions.
|
|
type Condition struct {
|
|
params []condValue
|
|
}
|
|
|
|
// NewCondition return new condition struct
|
|
func NewCondition() *Condition {
|
|
c := &Condition{}
|
|
return c
|
|
}
|
|
|
|
// And add expression to condition
|
|
func (c Condition) And(expr string, args ...interface{}) *Condition {
|
|
if expr == "" || len(args) == 0 {
|
|
panic(fmt.Errorf("<Condition.And> args cannot empty"))
|
|
}
|
|
c.params = append(c.params, condValue{exprs: strings.Split(expr, ExprSep), args: args})
|
|
return &c
|
|
}
|
|
|
|
// AndNot add NOT expression to condition
|
|
func (c Condition) AndNot(expr string, args ...interface{}) *Condition {
|
|
if expr == "" || len(args) == 0 {
|
|
panic(fmt.Errorf("<Condition.AndNot> args cannot empty"))
|
|
}
|
|
c.params = append(c.params, condValue{exprs: strings.Split(expr, ExprSep), args: args, isNot: true})
|
|
return &c
|
|
}
|
|
|
|
// AndCond combine a condition to current condition
|
|
func (c *Condition) AndCond(cond *Condition) *Condition {
|
|
c = c.clone()
|
|
if c == cond {
|
|
panic(fmt.Errorf("<Condition.AndCond> cannot use self as sub cond"))
|
|
}
|
|
if cond != nil {
|
|
c.params = append(c.params, condValue{cond: cond, isCond: true})
|
|
}
|
|
return c
|
|
}
|
|
|
|
// Or add OR expression to condition
|
|
func (c Condition) Or(expr string, args ...interface{}) *Condition {
|
|
if expr == "" || len(args) == 0 {
|
|
panic(fmt.Errorf("<Condition.Or> args cannot empty"))
|
|
}
|
|
c.params = append(c.params, condValue{exprs: strings.Split(expr, ExprSep), args: args, isOr: true})
|
|
return &c
|
|
}
|
|
|
|
// OrNot add OR NOT expression to condition
|
|
func (c Condition) OrNot(expr string, args ...interface{}) *Condition {
|
|
if expr == "" || len(args) == 0 {
|
|
panic(fmt.Errorf("<Condition.OrNot> args cannot empty"))
|
|
}
|
|
c.params = append(c.params, condValue{exprs: strings.Split(expr, ExprSep), args: args, isNot: true, isOr: true})
|
|
return &c
|
|
}
|
|
|
|
// OrCond combine a OR condition to current condition
|
|
func (c *Condition) OrCond(cond *Condition) *Condition {
|
|
c = c.clone()
|
|
if c == cond {
|
|
panic(fmt.Errorf("<Condition.OrCond> cannot use self as sub cond"))
|
|
}
|
|
if cond != nil {
|
|
c.params = append(c.params, condValue{cond: cond, isCond: true, isOr: true})
|
|
}
|
|
return c
|
|
}
|
|
|
|
// IsEmpty check the condition arguments are empty or not.
|
|
func (c *Condition) IsEmpty() bool {
|
|
return len(c.params) == 0
|
|
}
|
|
|
|
// clone clone a condition
|
|
func (c Condition) clone() *Condition {
|
|
return &c
|
|
}
|