github.com/ecodeclub/eorm@v0.0.2-0.20231001112437-dae71da914d0/predicate.go (about) 1 // Copyright 2021 ecodeclub 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package eorm 16 17 import operator "github.com/ecodeclub/eorm/internal/operator" 18 19 // type op Operator.Op 20 var ( 21 opLT = operator.OpLT 22 opLTEQ = operator.OpLTEQ 23 opGT = operator.OpGT 24 opGTEQ = operator.OpGTEQ 25 opEQ = operator.OpEQ 26 opNEQ = operator.OpNEQ 27 opAdd = operator.OpAdd 28 opMulti = operator.OpMulti 29 opAnd = operator.OpAnd 30 opOr = operator.OpOr 31 opNot = operator.OpNot 32 opIn = operator.OpIn 33 opNotIN = operator.OpNotIN 34 opFalse = operator.OpFalse 35 opLike = operator.OpLike 36 opNotLike = operator.OpNotLike 37 opExist = operator.OpExist 38 ) 39 40 // Predicate will be used in Where Or Having 41 type Predicate binaryExpr 42 43 var emptyPredicate = Predicate{} 44 45 func (Predicate) expr() (string, error) { 46 return "", nil 47 } 48 49 // Exist indicates "Exist" 50 func Exist(sub Subquery) Predicate { 51 return Predicate{ 52 op: opExist, 53 right: sub, 54 } 55 } 56 57 // Not indicates "NOT" 58 func Not(p Predicate) Predicate { 59 return Predicate{ 60 left: Raw(""), 61 op: opNot, 62 right: p, 63 } 64 } 65 66 // And indicates "AND" 67 func (p Predicate) And(pred Predicate) Predicate { 68 return Predicate{ 69 left: p, 70 op: opAnd, 71 right: pred, 72 } 73 } 74 75 // Or indicates "OR" 76 func (p Predicate) Or(pred Predicate) Predicate { 77 return Predicate{ 78 left: p, 79 op: opOr, 80 right: pred, 81 } 82 }