552 lines
15 KiB
Go
552 lines
15 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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"errors"
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"fmt"
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"reflect"
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"strconv"
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"strings"
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"xorm.io/builder"
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"xorm.io/xorm/caches"
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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 = errors.New("no columns found to be updated")
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)
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func (session *Session) cacheUpdate(table *schemas.Table, tableName, sqlStr string, args ...interface{}) error {
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if table == nil ||
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session.tx != nil {
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return ErrCacheFailed
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}
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oldhead, newsql := session.statement.ConvertUpdateSQL(sqlStr)
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if newsql == "" {
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return ErrCacheFailed
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}
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for _, filter := range session.engine.dialect.Filters() {
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newsql = filter.Do(newsql)
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}
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session.engine.logger.Debugf("[cache] new sql: %v, %v", oldhead, newsql)
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var nStart int
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if len(args) > 0 {
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if strings.Index(sqlStr, "?") > -1 {
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nStart = strings.Count(oldhead, "?")
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} else {
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// only for pq, TODO: if any other databse?
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nStart = strings.Count(oldhead, "$")
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}
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}
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cacher := session.engine.GetCacher(tableName)
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session.engine.logger.Debugf("[cache] get cache sql: %v, %v", newsql, args[nStart:])
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ids, err := caches.GetCacheSql(cacher, tableName, newsql, args[nStart:])
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if err != nil {
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rows, err := session.NoCache().queryRows(newsql, args[nStart:]...)
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if err != nil {
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return err
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}
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defer rows.Close()
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ids = make([]schemas.PK, 0)
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for rows.Next() {
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var res = make([]string, len(table.PrimaryKeys))
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err = rows.ScanSlice(&res)
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if err != nil {
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return err
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}
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var pk schemas.PK = make([]interface{}, len(table.PrimaryKeys))
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for i, col := range table.PKColumns() {
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if col.SQLType.IsNumeric() {
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n, err := strconv.ParseInt(res[i], 10, 64)
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if err != nil {
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return err
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}
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pk[i] = n
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} else if col.SQLType.IsText() {
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pk[i] = res[i]
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} else {
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return errors.New("not supported")
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}
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}
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ids = append(ids, pk)
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}
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if rows.Err() != nil {
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return rows.Err()
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}
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session.engine.logger.Debugf("[cache] find updated id: %v", ids)
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} /*else {
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session.engine.LogDebug("[xorm:cacheUpdate] del cached sql:", tableName, newsql, args)
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cacher.DelIds(tableName, genSqlKey(newsql, args))
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}*/
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for _, id := range ids {
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sid, err := id.ToString()
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if err != nil {
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return err
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}
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if bean := cacher.GetBean(tableName, sid); bean != nil {
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sqls := utils.SplitNNoCase(sqlStr, "where", 2)
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if len(sqls) == 0 || len(sqls) > 2 {
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return ErrCacheFailed
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}
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sqls = utils.SplitNNoCase(sqls[0], "set", 2)
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if len(sqls) != 2 {
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return ErrCacheFailed
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}
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kvs := strings.Split(strings.TrimSpace(sqls[1]), ",")
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for idx, kv := range kvs {
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sps := strings.SplitN(kv, "=", 2)
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sps2 := strings.Split(sps[0], ".")
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colName := sps2[len(sps2)-1]
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colName = session.engine.dialect.Quoter().Trim(colName)
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colName = schemas.CommonQuoter.Trim(colName)
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if col := table.GetColumn(colName); col != nil {
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fieldValue, err := col.ValueOf(bean)
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if err != nil {
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session.engine.logger.Errorf("%v", err)
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} else {
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session.engine.logger.Debugf("[cache] set bean field: %v, %v, %v", bean, colName, fieldValue.Interface())
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if col.IsVersion && session.statement.CheckVersion {
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session.incrVersionFieldValue(fieldValue)
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} else {
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fieldValue.Set(reflect.ValueOf(args[idx]))
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}
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}
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} else {
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session.engine.logger.Errorf("[cache] ERROR: column %v is not table %v's",
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colName, table.Name)
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}
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}
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session.engine.logger.Debugf("[cache] update cache: %v, %v, %v", tableName, id, bean)
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cacher.PutBean(tableName, sid, bean)
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}
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}
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session.engine.logger.Debugf("[cache] clear cached table sql: %v", tableName)
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cacher.ClearIds(tableName)
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return nil
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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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// 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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var colNames []string
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var args []interface{}
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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 err error
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var isMap = t.Kind() == reflect.Map
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var 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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var 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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// for update action to like "column = column + ?"
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incColumns := session.statement.IncrColumns
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for _, expr := range incColumns {
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colNames = append(colNames, session.engine.Quote(expr.ColName)+" = "+session.engine.Quote(expr.ColName)+" + ?")
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args = append(args, expr.Arg)
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}
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// for update action to like "column = column - ?"
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decColumns := session.statement.DecrColumns
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for _, expr := range decColumns {
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colNames = append(colNames, session.engine.Quote(expr.ColName)+" = "+session.engine.Quote(expr.ColName)+" - ?")
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args = append(args, expr.Arg)
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}
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// for update action to like "column = expression"
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exprColumns := session.statement.ExprColumns
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for _, expr := range exprColumns {
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switch tp := expr.Arg.(type) {
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case string:
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if len(tp) == 0 {
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tp = "''"
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}
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colNames = append(colNames, session.engine.Quote(expr.ColName)+"="+tp)
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case *builder.Builder:
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subQuery, subArgs, err := session.statement.GenCondSQL(tp)
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if err != nil {
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return 0, err
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}
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colNames = append(colNames, session.engine.Quote(expr.ColName)+"=("+subQuery+")")
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args = append(args, subArgs...)
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default:
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colNames = append(colNames, session.engine.Quote(expr.ColName)+"=?")
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args = append(args, expr.Arg)
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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 !session.statement.NoAutoCondition {
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condBeanIsStruct := false
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if len(condiBean) > 0 {
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if c, ok := condiBean[0].(map[string]interface{}); ok {
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autoCond = builder.Eq(c)
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} else {
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ct := reflect.TypeOf(condiBean[0])
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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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condTable, err := session.engine.TableInfo(condiBean[0])
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if err != nil {
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return 0, err
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}
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autoCond, err = session.statement.BuildConds(condTable, condiBean[0], true, true, false, true, false)
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if err != nil {
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return 0, err
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}
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condBeanIsStruct = true
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} else {
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return 0, ErrConditionType
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}
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}
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}
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if !condBeanIsStruct && 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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}
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st := session.statement
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var (
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sqlStr string
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condArgs []interface{}
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condSQL string
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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().ValueOf(bean)
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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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colNames = append(colNames, session.engine.Quote(table.Version)+" = "+session.engine.Quote(table.Version)+" + 1")
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}
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}
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if len(colNames) <= 0 {
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return 0, ErrNoColumnsTobeUpdated
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}
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condSQL, condArgs, err = session.statement.GenCondSQL(cond)
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if err != nil {
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return 0, err
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}
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if len(condSQL) > 0 {
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condSQL = "WHERE " + condSQL
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}
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if st.OrderStr != "" {
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condSQL = condSQL + fmt.Sprintf(" ORDER BY %v", st.OrderStr)
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}
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var tableName = session.statement.TableName()
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// TODO: Oracle support needed
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var top string
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if st.LimitN != nil {
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limitValue := *st.LimitN
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switch session.engine.dialect.URI().DBType {
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case schemas.MYSQL:
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condSQL = condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
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case schemas.SQLITE:
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tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
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cond = cond.And(builder.Expr(fmt.Sprintf("rowid IN (SELECT rowid FROM %v %v)",
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session.engine.Quote(tableName), tempCondSQL), condArgs...))
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condSQL, condArgs, err = session.statement.GenCondSQL(cond)
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if err != nil {
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return 0, err
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}
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if len(condSQL) > 0 {
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condSQL = "WHERE " + condSQL
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}
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case schemas.POSTGRES:
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tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
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cond = cond.And(builder.Expr(fmt.Sprintf("CTID IN (SELECT CTID FROM %v %v)",
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session.engine.Quote(tableName), tempCondSQL), condArgs...))
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condSQL, condArgs, err = session.statement.GenCondSQL(cond)
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if err != nil {
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return 0, err
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}
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if len(condSQL) > 0 {
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condSQL = "WHERE " + condSQL
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}
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case schemas.MSSQL:
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if st.OrderStr != "" && table != nil && len(table.PrimaryKeys) == 1 {
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cond = builder.Expr(fmt.Sprintf("%s IN (SELECT TOP (%d) %s FROM %v%v)",
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table.PrimaryKeys[0], limitValue, table.PrimaryKeys[0],
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session.engine.Quote(tableName), condSQL), condArgs...)
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condSQL, condArgs, err = session.statement.GenCondSQL(cond)
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if err != nil {
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return 0, err
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}
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if len(condSQL) > 0 {
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condSQL = "WHERE " + condSQL
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}
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} else {
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top = fmt.Sprintf("TOP (%d) ", limitValue)
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}
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}
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}
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var tableAlias = session.engine.Quote(tableName)
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var fromSQL string
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if session.statement.TableAlias != "" {
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switch session.engine.dialect.URI().DBType {
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case schemas.MSSQL:
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fromSQL = fmt.Sprintf("FROM %s %s ", tableAlias, session.statement.TableAlias)
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tableAlias = session.statement.TableAlias
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default:
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tableAlias = fmt.Sprintf("%s AS %s", tableAlias, session.statement.TableAlias)
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}
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}
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sqlStr = fmt.Sprintf("UPDATE %v%v SET %v %v%v",
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top,
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tableAlias,
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strings.Join(colNames, ", "),
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fromSQL,
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condSQL)
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res, err := session.exec(sqlStr, append(args, condArgs...)...)
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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 && session.statement.UseCache {
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// session.cacheUpdate(table, tableName, sqlStr, args...)
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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
|
|
fieldValue = reflect.ValueOf(nilValue)
|
|
}
|
|
}
|
|
|
|
if col.IsUpdated && session.statement.UseAutoTime /*&& isZero(fieldValue.Interface())*/ {
|
|
// if time is non-empty, then set to auto time
|
|
val, t, err := session.engine.nowTime(col)
|
|
if err != nil {
|
|
return nil, nil, err
|
|
}
|
|
args = append(args, val)
|
|
|
|
var colName = col.Name
|
|
session.afterClosures = append(session.afterClosures, func(bean interface{}) {
|
|
col := table.GetColumn(colName)
|
|
setColumnTime(bean, col, t)
|
|
})
|
|
} else if col.IsVersion && session.statement.CheckVersion {
|
|
args = append(args, 1)
|
|
} else {
|
|
arg, err := session.statement.Value2Interface(col, fieldValue)
|
|
if err != nil {
|
|
return colNames, args, err
|
|
}
|
|
args = append(args, arg)
|
|
}
|
|
|
|
colNames = append(colNames, session.engine.Quote(col.Name)+" = ?")
|
|
}
|
|
return colNames, args, nil
|
|
}
|