99 lines
2.9 KiB
Go
99 lines
2.9 KiB
Go
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// Copyright 2017 The Xorm Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package statements
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import (
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"fmt"
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"reflect"
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"xorm.io/builder"
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"xorm.io/xorm/schemas"
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)
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var (
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ptrPkType = reflect.TypeOf(&schemas.PK{})
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pkType = reflect.TypeOf(schemas.PK{})
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stringType = reflect.TypeOf("")
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intType = reflect.TypeOf(int64(0))
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uintType = reflect.TypeOf(uint64(0))
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)
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// ErrIDConditionWithNoTable represents an error there is no reference table with an ID condition
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type ErrIDConditionWithNoTable struct {
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ID schemas.PK
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}
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func (err ErrIDConditionWithNoTable) Error() string {
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return fmt.Sprintf("ID condition %#v need reference table", err.ID)
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}
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// IsIDConditionWithNoTableErr return true if the err is ErrIDConditionWithNoTable
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func IsIDConditionWithNoTableErr(err error) bool {
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_, ok := err.(ErrIDConditionWithNoTable)
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return ok
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}
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// ID generate "where id = ? " statement or for composite key "where key1 = ? and key2 = ?"
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func (statement *Statement) ID(id interface{}) *Statement {
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switch t := id.(type) {
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case *schemas.PK:
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statement.idParam = *t
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case schemas.PK:
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statement.idParam = t
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case string, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
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statement.idParam = schemas.PK{id}
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default:
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idValue := reflect.ValueOf(id)
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idType := idValue.Type()
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switch idType.Kind() {
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case reflect.String:
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statement.idParam = schemas.PK{idValue.Convert(stringType).Interface()}
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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statement.idParam = schemas.PK{idValue.Convert(intType).Interface()}
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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statement.idParam = schemas.PK{idValue.Convert(uintType).Interface()}
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case reflect.Slice:
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if idType.ConvertibleTo(pkType) {
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statement.idParam = idValue.Convert(pkType).Interface().(schemas.PK)
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}
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case reflect.Ptr:
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if idType.ConvertibleTo(ptrPkType) {
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statement.idParam = idValue.Convert(ptrPkType).Elem().Interface().(schemas.PK)
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}
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}
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}
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if statement.idParam == nil {
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statement.LastError = fmt.Errorf("ID param %#v is not supported", id)
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}
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return statement
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}
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// ProcessIDParam handles the process of id condition
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func (statement *Statement) ProcessIDParam() error {
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if statement.idParam == nil {
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return nil
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}
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if statement.RefTable == nil {
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return ErrIDConditionWithNoTable{statement.idParam}
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}
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if len(statement.RefTable.PrimaryKeys) != len(statement.idParam) {
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return fmt.Errorf("ID condition is error, expect %d primarykeys, there are %d",
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len(statement.RefTable.PrimaryKeys),
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len(statement.idParam),
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)
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}
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for i, col := range statement.RefTable.PKColumns() {
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var colName = statement.colName(col, statement.TableName())
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statement.cond = statement.cond.And(builder.Eq{colName: statement.idParam[i]})
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}
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return nil
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}
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