Paul Lecuq
945b53f28c
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Reviewed-on: #1
320 lines
8.7 KiB
Go
320 lines
8.7 KiB
Go
// Copyright 2016 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 xorm
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import (
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"reflect"
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"xorm.io/builder"
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"xorm.io/xorm/internal/statements"
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"xorm.io/xorm/internal/utils"
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"xorm.io/xorm/schemas"
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)
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// enumerated all errors
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var (
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ErrNoColumnsTobeUpdated = statements.ErrNoColumnsTobeUpdated
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)
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func (session *Session) genAutoCond(condiBean interface{}) (builder.Cond, error) {
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if session.statement.NoAutoCondition {
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return builder.NewCond(), nil
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}
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if c, ok := condiBean.(map[string]interface{}); ok {
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eq := make(builder.Eq)
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for k, v := range c {
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eq[session.engine.Quote(k)] = v
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}
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if session.statement.RefTable != nil {
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if col := session.statement.RefTable.DeletedColumn(); col != nil && !session.statement.GetUnscoped() { // tag "deleted" is enabled
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return eq.And(session.statement.CondDeleted(col)), nil
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}
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}
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return eq, nil
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}
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ct := reflect.TypeOf(condiBean)
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k := ct.Kind()
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if k == reflect.Ptr {
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k = ct.Elem().Kind()
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}
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if k != reflect.Struct {
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return nil, ErrConditionType
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}
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condTable, err := session.engine.TableInfo(condiBean)
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if err != nil {
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return nil, err
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}
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return session.statement.BuildConds(condTable, condiBean, true, true, false, true, false)
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}
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// Update records, bean's non-empty fields are updated contents,
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// condiBean' non-empty filds are conditions
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// CAUTION:
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//
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// 1.bool will defaultly be updated content nor conditions
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// You should call UseBool if you have bool to use.
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// 2.float32 & float64 may be not inexact as conditions
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func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int64, error) {
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if session.isAutoClose {
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defer session.Close()
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}
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defer session.resetStatement()
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if session.statement.LastError != nil {
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return 0, session.statement.LastError
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}
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v := utils.ReflectValue(bean)
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t := v.Type()
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// handle before update processors
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for _, closure := range session.beforeClosures {
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closure(bean)
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}
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cleanupProcessorsClosures(&session.beforeClosures) // cleanup after used
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if processor, ok := interface{}(bean).(BeforeUpdateProcessor); ok {
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processor.BeforeUpdate()
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}
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// --
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var colNames []string
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var args []interface{}
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var err error
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isMap := t.Kind() == reflect.Map
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isStruct := t.Kind() == reflect.Struct
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if isStruct {
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if err := session.statement.SetRefBean(bean); err != nil {
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return 0, err
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}
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if len(session.statement.TableName()) == 0 {
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return 0, ErrTableNotFound
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}
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if session.statement.ColumnStr() == "" {
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colNames, args, err = session.statement.BuildUpdates(v, false, false,
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false, false, true)
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} else {
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colNames, args, err = session.genUpdateColumns(bean)
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}
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if err != nil {
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return 0, err
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}
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} else if isMap {
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colNames = make([]string, 0)
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args = make([]interface{}, 0)
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bValue := reflect.Indirect(reflect.ValueOf(bean))
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for _, v := range bValue.MapKeys() {
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colNames = append(colNames, session.engine.Quote(v.String())+" = ?")
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args = append(args, bValue.MapIndex(v).Interface())
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}
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} else {
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return 0, ErrParamsType
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}
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table := session.statement.RefTable
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if session.statement.UseAutoTime && table != nil && table.Updated != "" {
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if !session.statement.ColumnMap.Contain(table.Updated) &&
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!session.statement.OmitColumnMap.Contain(table.Updated) {
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colNames = append(colNames, session.engine.Quote(table.Updated)+" = ?")
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col := table.UpdatedColumn()
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val, t, err := session.engine.nowTime(col)
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if err != nil {
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return 0, err
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}
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if session.engine.dialect.URI().DBType == schemas.ORACLE {
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args = append(args, t)
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} else {
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args = append(args, val)
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}
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colName := col.Name
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if isStruct {
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session.afterClosures = append(session.afterClosures, func(bean interface{}) {
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col := table.GetColumn(colName)
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setColumnTime(bean, col, t)
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})
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}
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}
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}
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if err = session.statement.ProcessIDParam(); err != nil {
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return 0, err
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}
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var autoCond builder.Cond
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if len(condiBean) > 0 {
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autoCond, err = session.genAutoCond(condiBean[0])
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if err != nil {
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return 0, err
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}
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} else if table != nil {
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if col := table.DeletedColumn(); col != nil && !session.statement.GetUnscoped() { // tag "deleted" is enabled
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autoCond1 := session.statement.CondDeleted(col)
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if autoCond == nil {
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autoCond = autoCond1
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} else {
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autoCond = autoCond.And(autoCond1)
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}
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}
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}
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var (
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cond = session.statement.Conds().And(autoCond)
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doIncVer = isStruct && (table != nil && table.Version != "" && session.statement.CheckVersion)
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verValue *reflect.Value
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)
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if doIncVer {
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verValue, err = table.VersionColumn().ValueOfV(&v)
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if err != nil {
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return 0, err
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}
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if verValue != nil {
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cond = cond.And(builder.Eq{session.engine.Quote(table.Version): verValue.Interface()})
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}
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}
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updateWriter := builder.NewWriter()
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if err := session.statement.WriteUpdate(updateWriter, cond, v, colNames, args); err != nil {
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return 0, err
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}
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tableName := session.statement.TableName() // table name must been get before exec because statement will be reset
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useCache := session.statement.UseCache
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res, err := session.exec(updateWriter.String(), updateWriter.Args()...)
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if err != nil {
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return 0, err
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} else if doIncVer {
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if verValue != nil && verValue.IsValid() && verValue.CanSet() {
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session.incrVersionFieldValue(verValue)
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}
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}
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if cacher := session.engine.GetCacher(tableName); cacher != nil && useCache {
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session.engine.logger.Debugf("[cache] clear table: %v", tableName)
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cacher.ClearIds(tableName)
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cacher.ClearBeans(tableName)
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}
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// handle after update processors
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if session.isAutoCommit {
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for _, closure := range session.afterClosures {
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closure(bean)
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}
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if processor, ok := interface{}(bean).(AfterUpdateProcessor); ok {
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session.engine.logger.Debugf("[event] %v has after update processor", tableName)
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processor.AfterUpdate()
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}
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} else {
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lenAfterClosures := len(session.afterClosures)
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if lenAfterClosures > 0 {
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if value, has := session.afterUpdateBeans[bean]; has && value != nil {
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*value = append(*value, session.afterClosures...)
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} else {
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afterClosures := make([]func(interface{}), lenAfterClosures)
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copy(afterClosures, session.afterClosures)
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// FIXME: if bean is a map type, it will panic because map cannot be as map key
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session.afterUpdateBeans[bean] = &afterClosures
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}
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} else {
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if _, ok := interface{}(bean).(AfterUpdateProcessor); ok {
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session.afterUpdateBeans[bean] = nil
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}
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}
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}
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cleanupProcessorsClosures(&session.afterClosures) // cleanup after used
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// --
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return res.RowsAffected()
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}
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func (session *Session) genUpdateColumns(bean interface{}) ([]string, []interface{}, error) {
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table := session.statement.RefTable
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colNames := make([]string, 0, len(table.ColumnsSeq()))
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args := make([]interface{}, 0, len(table.ColumnsSeq()))
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for _, col := range table.Columns() {
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if !col.IsVersion && !col.IsCreated && !col.IsUpdated {
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if session.statement.OmitColumnMap.Contain(col.Name) {
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continue
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}
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}
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if col.MapType == schemas.ONLYFROMDB {
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continue
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}
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fieldValuePtr, err := col.ValueOf(bean)
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if err != nil {
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return nil, nil, err
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}
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fieldValue := *fieldValuePtr
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if col.IsAutoIncrement && utils.IsValueZero(fieldValue) {
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continue
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}
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if (col.IsDeleted && !session.statement.GetUnscoped()) || col.IsCreated {
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continue
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}
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// if only update specify columns
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if len(session.statement.ColumnMap) > 0 && !session.statement.ColumnMap.Contain(col.Name) {
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continue
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}
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if session.statement.IncrColumns.IsColExist(col.Name) {
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continue
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} else if session.statement.DecrColumns.IsColExist(col.Name) {
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continue
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} else if session.statement.ExprColumns.IsColExist(col.Name) {
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continue
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}
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// !evalphobia! set fieldValue as nil when column is nullable and zero-value
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if _, ok := getFlagForColumn(session.statement.NullableMap, col); ok {
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if col.Nullable && utils.IsValueZero(fieldValue) {
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var nilValue *int
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fieldValue = reflect.ValueOf(nilValue)
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}
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}
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if col.IsUpdated && session.statement.UseAutoTime /*&& isZero(fieldValue.Interface())*/ {
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// if time is non-empty, then set to auto time
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val, t, err := session.engine.nowTime(col)
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if err != nil {
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return nil, nil, err
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}
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args = append(args, val)
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colName := col.Name
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session.afterClosures = append(session.afterClosures, func(bean interface{}) {
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col := table.GetColumn(colName)
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setColumnTime(bean, col, t)
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})
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} else if col.IsVersion && session.statement.CheckVersion {
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args = append(args, 1)
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} else {
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arg, err := session.statement.Value2Interface(col, fieldValue)
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if err != nil {
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return colNames, args, err
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}
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args = append(args, arg)
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}
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colNames = append(colNames, session.engine.Quote(col.Name)+" = ?")
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}
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return colNames, args, nil
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}
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