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gitea/vendor/github.com/go-xorm/xorm/session_update.go

346 lines
10 KiB
Go

// Copyright 2016 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package xorm
import (
"errors"
"fmt"
"reflect"
"strconv"
"strings"
"github.com/go-xorm/builder"
"github.com/go-xorm/core"
)
func (session *Session) cacheUpdate(sqlStr string, args ...interface{}) error {
if session.Statement.RefTable == nil ||
session.Tx != nil {
return ErrCacheFailed
}
oldhead, newsql := session.Statement.convertUpdateSQL(sqlStr)
if newsql == "" {
return ErrCacheFailed
}
for _, filter := range session.Engine.dialect.Filters() {
newsql = filter.Do(newsql, session.Engine.dialect, session.Statement.RefTable)
}
session.Engine.logger.Debug("[cacheUpdate] new sql", oldhead, newsql)
var nStart int
if len(args) > 0 {
if strings.Index(sqlStr, "?") > -1 {
nStart = strings.Count(oldhead, "?")
} else {
// only for pq, TODO: if any other databse?
nStart = strings.Count(oldhead, "$")
}
}
table := session.Statement.RefTable
cacher := session.Engine.getCacher2(table)
tableName := session.Statement.TableName()
session.Engine.logger.Debug("[cacheUpdate] get cache sql", newsql, args[nStart:])
ids, err := core.GetCacheSql(cacher, tableName, newsql, args[nStart:])
if err != nil {
rows, err := session.DB().Query(newsql, args[nStart:]...)
if err != nil {
return err
}
defer rows.Close()
ids = make([]core.PK, 0)
for rows.Next() {
var res = make([]string, len(table.PrimaryKeys))
err = rows.ScanSlice(&res)
if err != nil {
return err
}
var pk core.PK = make([]interface{}, len(table.PrimaryKeys))
for i, col := range table.PKColumns() {
if col.SQLType.IsNumeric() {
n, err := strconv.ParseInt(res[i], 10, 64)
if err != nil {
return err
}
pk[i] = n
} else if col.SQLType.IsText() {
pk[i] = res[i]
} else {
return errors.New("not supported")
}
}
ids = append(ids, pk)
}
session.Engine.logger.Debug("[cacheUpdate] find updated id", ids)
} /*else {
session.Engine.LogDebug("[xorm:cacheUpdate] del cached sql:", tableName, newsql, args)
cacher.DelIds(tableName, genSqlKey(newsql, args))
}*/
for _, id := range ids {
sid, err := id.ToString()
if err != nil {
return err
}
if bean := cacher.GetBean(tableName, sid); bean != nil {
sqls := splitNNoCase(sqlStr, "where", 2)
if len(sqls) == 0 || len(sqls) > 2 {
return ErrCacheFailed
}
sqls = splitNNoCase(sqls[0], "set", 2)
if len(sqls) != 2 {
return ErrCacheFailed
}
kvs := strings.Split(strings.TrimSpace(sqls[1]), ",")
for idx, kv := range kvs {
sps := strings.SplitN(kv, "=", 2)
sps2 := strings.Split(sps[0], ".")
colName := sps2[len(sps2)-1]
if strings.Contains(colName, "`") {
colName = strings.TrimSpace(strings.Replace(colName, "`", "", -1))
} else if strings.Contains(colName, session.Engine.QuoteStr()) {
colName = strings.TrimSpace(strings.Replace(colName, session.Engine.QuoteStr(), "", -1))
} else {
session.Engine.logger.Debug("[cacheUpdate] cannot find column", tableName, colName)
return ErrCacheFailed
}
if col := table.GetColumn(colName); col != nil {
fieldValue, err := col.ValueOf(bean)
if err != nil {
session.Engine.logger.Error(err)
} else {
session.Engine.logger.Debug("[cacheUpdate] set bean field", bean, colName, fieldValue.Interface())
if col.IsVersion && session.Statement.checkVersion {
fieldValue.SetInt(fieldValue.Int() + 1)
} else {
fieldValue.Set(reflect.ValueOf(args[idx]))
}
}
} else {
session.Engine.logger.Errorf("[cacheUpdate] ERROR: column %v is not table %v's",
colName, table.Name)
}
}
session.Engine.logger.Debug("[cacheUpdate] update cache", tableName, id, bean)
cacher.PutBean(tableName, sid, bean)
}
}
session.Engine.logger.Debug("[cacheUpdate] clear cached table sql:", tableName)
cacher.ClearIds(tableName)
return nil
}
// Update records, bean's non-empty fields are updated contents,
// condiBean' non-empty filds are conditions
// CAUTION:
// 1.bool will defaultly be updated content nor conditions
// You should call UseBool if you have bool to use.
// 2.float32 & float64 may be not inexact as conditions
func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int64, error) {
defer session.resetStatement()
if session.IsAutoClose {
defer session.Close()
}
v := rValue(bean)
t := v.Type()
var colNames []string
var args []interface{}
// handle before update processors
for _, closure := range session.beforeClosures {
closure(bean)
}
cleanupProcessorsClosures(&session.beforeClosures) // cleanup after used
if processor, ok := interface{}(bean).(BeforeUpdateProcessor); ok {
processor.BeforeUpdate()
}
// --
var err error
var isMap = t.Kind() == reflect.Map
var isStruct = t.Kind() == reflect.Struct
if isStruct {
session.Statement.setRefValue(v)
if len(session.Statement.TableName()) <= 0 {
return 0, ErrTableNotFound
}
if session.Statement.ColumnStr == "" {
colNames, args = buildUpdates(session.Engine, session.Statement.RefTable, bean, false, false,
false, false, session.Statement.allUseBool, session.Statement.useAllCols,
session.Statement.mustColumnMap, session.Statement.nullableMap,
session.Statement.columnMap, true, session.Statement.unscoped)
} else {
colNames, args, err = genCols(session.Statement.RefTable, session, bean, true, true)
if err != nil {
return 0, err
}
}
} else if isMap {
colNames = make([]string, 0)
args = make([]interface{}, 0)
bValue := reflect.Indirect(reflect.ValueOf(bean))
for _, v := range bValue.MapKeys() {
colNames = append(colNames, session.Engine.Quote(v.String())+" = ?")
args = append(args, bValue.MapIndex(v).Interface())
}
} else {
return 0, ErrParamsType
}
table := session.Statement.RefTable
if session.Statement.UseAutoTime && table != nil && table.Updated != "" {
colNames = append(colNames, session.Engine.Quote(table.Updated)+" = ?")
col := table.UpdatedColumn()
val, t := session.Engine.NowTime2(col.SQLType.Name)
args = append(args, val)
var colName = col.Name
if isStruct {
session.afterClosures = append(session.afterClosures, func(bean interface{}) {
col := table.GetColumn(colName)
setColumnTime(bean, col, t)
})
}
}
//for update action to like "column = column + ?"
incColumns := session.Statement.getInc()
for _, v := range incColumns {
colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+session.Engine.Quote(v.colName)+" + ?")
args = append(args, v.arg)
}
//for update action to like "column = column - ?"
decColumns := session.Statement.getDec()
for _, v := range decColumns {
colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+session.Engine.Quote(v.colName)+" - ?")
args = append(args, v.arg)
}
//for update action to like "column = expression"
exprColumns := session.Statement.getExpr()
for _, v := range exprColumns {
colNames = append(colNames, session.Engine.Quote(v.colName)+" = "+v.expr)
}
session.Statement.processIDParam()
var autoCond builder.Cond
if !session.Statement.noAutoCondition && len(condiBean) > 0 {
var err error
autoCond, err = session.Statement.buildConds(session.Statement.RefTable, condiBean[0], true, true, false, true, false)
if err != nil {
return 0, err
}
}
st := session.Statement
defer session.resetStatement()
var sqlStr string
var condArgs []interface{}
var condSQL string
cond := session.Statement.cond.And(autoCond)
doIncVer := false
var verValue *reflect.Value
if table != nil && table.Version != "" && session.Statement.checkVersion {
verValue, err = table.VersionColumn().ValueOf(bean)
if err != nil {
return 0, err
}
cond = cond.And(builder.Eq{session.Engine.Quote(table.Version): verValue.Interface()})
condSQL, condArgs, _ = builder.ToSQL(cond)
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
if st.LimitN > 0 {
condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
}
sqlStr = fmt.Sprintf("UPDATE %v SET %v, %v %v",
session.Engine.Quote(session.Statement.TableName()),
strings.Join(colNames, ", "),
session.Engine.Quote(table.Version)+" = "+session.Engine.Quote(table.Version)+" + 1",
condSQL)
doIncVer = true
} else {
condSQL, condArgs, _ = builder.ToSQL(cond)
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
if st.LimitN > 0 {
condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
}
sqlStr = fmt.Sprintf("UPDATE %v SET %v %v",
session.Engine.Quote(session.Statement.TableName()),
strings.Join(colNames, ", "),
condSQL)
}
res, err := session.exec(sqlStr, append(args, condArgs...)...)
if err != nil {
return 0, err
} else if doIncVer {
if verValue != nil && verValue.IsValid() && verValue.CanSet() {
verValue.SetInt(verValue.Int() + 1)
}
}
if table != nil {
if cacher := session.Engine.getCacher2(table); cacher != nil && session.Statement.UseCache {
cacher.ClearIds(session.Statement.TableName())
cacher.ClearBeans(session.Statement.TableName())
}
}
// handle after update processors
if session.IsAutoCommit {
for _, closure := range session.afterClosures {
closure(bean)
}
if processor, ok := interface{}(bean).(AfterUpdateProcessor); ok {
session.Engine.logger.Debug("[event]", session.Statement.TableName(), " has after update processor")
processor.AfterUpdate()
}
} else {
lenAfterClosures := len(session.afterClosures)
if lenAfterClosures > 0 {
if value, has := session.afterUpdateBeans[bean]; has && value != nil {
*value = append(*value, session.afterClosures...)
} else {
afterClosures := make([]func(interface{}), lenAfterClosures)
copy(afterClosures, session.afterClosures)
// FIXME: if bean is a map type, it will panic because map cannot be as map key
session.afterUpdateBeans[bean] = &afterClosures
}
} else {
if _, ok := interface{}(bean).(AfterUpdateProcessor); ok {
session.afterUpdateBeans[bean] = nil
}
}
}
cleanupProcessorsClosures(&session.afterClosures) // cleanup after used
// --
return res.RowsAffected()
}