/
orm_queryset.go
376 lines (325 loc) · 9.65 KB
/
orm_queryset.go
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// 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 (
"context"
"fmt"
"github.com/beego/beego/v2/client/orm/clauses/order_clause"
"github.com/beego/beego/v2/client/orm/hints"
)
type colValue struct {
value int64
opt operator
}
type operator int
// define Col operations
const (
ColAdd operator = iota
ColMinus
ColMultiply
ColExcept
ColBitAnd
ColBitRShift
ColBitLShift
ColBitXOR
ColBitOr
)
// ColValue do the field raw changes. e.g Nums = Nums + 10. usage:
// Params{
// "Nums": ColValue(Col_Add, 10),
// }
func ColValue(opt operator, value interface{}) interface{} {
switch opt {
case ColAdd, ColMinus, ColMultiply, ColExcept, ColBitAnd, ColBitRShift,
ColBitLShift, ColBitXOR, ColBitOr:
default:
panic(fmt.Errorf("orm.ColValue wrong operator"))
}
v, err := StrTo(ToStr(value)).Int64()
if err != nil {
panic(fmt.Errorf("orm.ColValue doesn't support non string/numeric type, %s", err))
}
var val colValue
val.value = v
val.opt = opt
return val
}
// real query struct
type querySet struct {
mi *modelInfo
cond *Condition
related []string
relDepth int
limit int64
offset int64
groups []string
orders []*order_clause.Order
distinct bool
forUpdate bool
useIndex int
indexes []string
orm *ormBase
aggregate string
}
var _ QuerySeter = new(querySet)
// add condition expression to QuerySeter.
func (o querySet) Filter(expr string, args ...interface{}) QuerySeter {
if o.cond == nil {
o.cond = NewCondition()
}
o.cond = o.cond.And(expr, args...)
return &o
}
// add raw sql to querySeter.
func (o querySet) FilterRaw(expr string, sql string) QuerySeter {
if o.cond == nil {
o.cond = NewCondition()
}
o.cond = o.cond.Raw(expr, sql)
return &o
}
// add NOT condition to querySeter.
func (o querySet) Exclude(expr string, args ...interface{}) QuerySeter {
if o.cond == nil {
o.cond = NewCondition()
}
o.cond = o.cond.AndNot(expr, args...)
return &o
}
// set offset number
func (o *querySet) setOffset(num interface{}) {
o.offset = ToInt64(num)
}
// add LIMIT value.
// args[0] means offset, e.g. LIMIT num,offset.
func (o querySet) Limit(limit interface{}, args ...interface{}) QuerySeter {
o.limit = ToInt64(limit)
if len(args) > 0 {
o.setOffset(args[0])
}
return &o
}
// add OFFSET value
func (o querySet) Offset(offset interface{}) QuerySeter {
o.setOffset(offset)
return &o
}
// add GROUP expression
func (o querySet) GroupBy(exprs ...string) QuerySeter {
o.groups = exprs
return &o
}
// add ORDER expression.
// "column" means ASC, "-column" means DESC.
func (o querySet) OrderBy(expressions ...string) QuerySeter {
if len(expressions) <= 0 {
return &o
}
o.orders = order_clause.ParseOrder(expressions...)
return &o
}
// add ORDER expression.
func (o querySet) OrderClauses(orders ...*order_clause.Order) QuerySeter {
if len(orders) <= 0 {
return &o
}
o.orders = orders
return &o
}
// add DISTINCT to SELECT
func (o querySet) Distinct() QuerySeter {
o.distinct = true
return &o
}
// add FOR UPDATE to SELECT
func (o querySet) ForUpdate() QuerySeter {
o.forUpdate = true
return &o
}
// ForceIndex force index for query
func (o querySet) ForceIndex(indexes ...string) QuerySeter {
o.useIndex = hints.KeyForceIndex
o.indexes = indexes
return &o
}
// UseIndex use index for query
func (o querySet) UseIndex(indexes ...string) QuerySeter {
o.useIndex = hints.KeyUseIndex
o.indexes = indexes
return &o
}
// IgnoreIndex ignore index for query
func (o querySet) IgnoreIndex(indexes ...string) QuerySeter {
o.useIndex = hints.KeyIgnoreIndex
o.indexes = indexes
return &o
}
// set relation model to query together.
// it will query relation models and assign to parent model.
func (o querySet) RelatedSel(params ...interface{}) QuerySeter {
if len(params) == 0 {
o.relDepth = DefaultRelsDepth
} else {
for _, p := range params {
switch val := p.(type) {
case string:
o.related = append(o.related, val)
case int:
o.relDepth = val
default:
panic(fmt.Errorf("<QuerySeter.RelatedSel> wrong param kind: %v", val))
}
}
}
return &o
}
// set condition to QuerySeter.
func (o querySet) SetCond(cond *Condition) QuerySeter {
o.cond = cond
return &o
}
// get condition from QuerySeter
func (o querySet) GetCond() *Condition {
return o.cond
}
// return QuerySeter execution result number
func (o *querySet) Count() (int64, error) {
return o.CountWithCtx(context.Background())
}
func (o *querySet) CountWithCtx(ctx context.Context) (int64, error) {
return o.orm.alias.DbBaser.Count(ctx, o.orm.db, o, o.mi, o.cond, o.orm.alias.TZ)
}
// check result empty or not after QuerySeter executed
func (o *querySet) Exist() bool {
return o.ExistWithCtx(context.Background())
}
func (o *querySet) ExistWithCtx(ctx context.Context) bool {
cnt, _ := o.orm.alias.DbBaser.Count(ctx, o.orm.db, o, o.mi, o.cond, o.orm.alias.TZ)
return cnt > 0
}
// execute update with parameters
func (o *querySet) Update(values Params) (int64, error) {
return o.UpdateWithCtx(context.Background(), values)
}
func (o *querySet) UpdateWithCtx(ctx context.Context, values Params) (int64, error) {
return o.orm.alias.DbBaser.UpdateBatch(ctx, o.orm.db, o, o.mi, o.cond, values, o.orm.alias.TZ)
}
// execute delete
func (o *querySet) Delete() (int64, error) {
return o.DeleteWithCtx(context.Background())
}
func (o *querySet) DeleteWithCtx(ctx context.Context) (int64, error) {
return o.orm.alias.DbBaser.DeleteBatch(ctx, o.orm.db, o, o.mi, o.cond, o.orm.alias.TZ)
}
// return a insert queryer.
// it can be used in times.
// example:
// i,err := sq.PrepareInsert()
// i.Add(&user1{},&user2{})
func (o *querySet) PrepareInsert() (Inserter, error) {
return o.PrepareInsertWithCtx(context.Background())
}
func (o *querySet) PrepareInsertWithCtx(ctx context.Context) (Inserter, error) {
return newInsertSet(ctx, o.orm, o.mi)
}
// query all data and map to containers.
// cols means the columns when querying.
func (o *querySet) All(container interface{}, cols ...string) (int64, error) {
return o.AllWithCtx(context.Background(), container, cols...)
}
func (o *querySet) AllWithCtx(ctx context.Context, container interface{}, cols ...string) (int64, error) {
return o.orm.alias.DbBaser.ReadBatch(ctx, o.orm.db, o, o.mi, o.cond, container, o.orm.alias.TZ, cols)
}
// query one row data and map to containers.
// cols means the columns when querying.
func (o *querySet) One(container interface{}, cols ...string) error {
return o.OneWithCtx(context.Background(), container, cols...)
}
func (o *querySet) OneWithCtx(ctx context.Context, container interface{}, cols ...string) error {
o.limit = 1
num, err := o.orm.alias.DbBaser.ReadBatch(ctx, o.orm.db, o, o.mi, o.cond, container, o.orm.alias.TZ, cols)
if err != nil {
return err
}
if num == 0 {
return ErrNoRows
}
if num > 1 {
return ErrMultiRows
}
return nil
}
// query all data and map to []map[string]interface.
// expres means condition expression.
// it converts data to []map[column]value.
func (o *querySet) Values(results *[]Params, exprs ...string) (int64, error) {
return o.ValuesWithCtx(context.Background(), results, exprs...)
}
func (o *querySet) ValuesWithCtx(ctx context.Context, results *[]Params, exprs ...string) (int64, error) {
return o.orm.alias.DbBaser.ReadValues(ctx, o.orm.db, o, o.mi, o.cond, exprs, results, o.orm.alias.TZ)
}
// query all data and map to [][]interface
// it converts data to [][column_index]value
func (o *querySet) ValuesList(results *[]ParamsList, exprs ...string) (int64, error) {
return o.ValuesListWithCtx(context.Background(), results, exprs...)
}
func (o *querySet) ValuesListWithCtx(ctx context.Context, results *[]ParamsList, exprs ...string) (int64, error) {
return o.orm.alias.DbBaser.ReadValues(ctx, o.orm.db, o, o.mi, o.cond, exprs, results, o.orm.alias.TZ)
}
// query all data and map to []interface.
// it's designed for one row record set, auto change to []value, not [][column]value.
func (o *querySet) ValuesFlat(result *ParamsList, expr string) (int64, error) {
return o.ValuesFlatWithCtx(context.Background(), result, expr)
}
func (o *querySet) ValuesFlatWithCtx(ctx context.Context, result *ParamsList, expr string) (int64, error) {
return o.orm.alias.DbBaser.ReadValues(ctx, o.orm.db, o, o.mi, o.cond, []string{expr}, result, o.orm.alias.TZ)
}
// query all rows into map[string]interface with specify key and value column name.
// keyCol = "name", valueCol = "value"
// table data
// name | value
// total | 100
// found | 200
// to map[string]interface{}{
// "total": 100,
// "found": 200,
// }
func (o *querySet) RowsToMap(result *Params, keyCol, valueCol string) (int64, error) {
panic(ErrNotImplement)
}
// query all rows into struct with specify key and value column name.
// keyCol = "name", valueCol = "value"
// table data
// name | value
// total | 100
// found | 200
// to struct {
// Total int
// Found int
// }
func (o *querySet) RowsToStruct(ptrStruct interface{}, keyCol, valueCol string) (int64, error) {
panic(ErrNotImplement)
}
// create new QuerySeter.
func newQuerySet(orm *ormBase, mi *modelInfo) QuerySeter {
o := new(querySet)
o.mi = mi
o.orm = orm
return o
}
// aggregate func
func (o querySet) Aggregate(s string) QuerySeter {
o.aggregate = s
return &o
}