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// 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(table *core.Table, tableName, sqlStr string, args ...interface{}) error {
if table == 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, table)
}
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, "$")
}
}
cacher := session.engine.getCacher(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.NoCache().queryRows(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) {
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 {
if err := session.statement.setRefBean(bean); err != nil {
return 0, err
}
if len(session.statement.TableName()) <= 0 {
return 0, ErrTableNotFound
}
if session.statement.ColumnStr == "" {
colNames, args = session.statement.buildUpdates(bean, false, false,
false, false, true)
} else {
colNames, args, err = session.genUpdateColumns(bean)
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 != "" {
if !session.statement.columnMap.contain(table.Updated) &&
!session.statement.omitColumnMap.contain(table.Updated) {
colNames = append(colNames, session.engine.Quote(table.Updated)+" = ?")
col := table.UpdatedColumn()
val, t := session.engine.nowTime(col)
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)
}
if err = session.statement.processIDParam(); err != nil {
return 0, err
}
var autoCond builder.Cond
if !session.statement.noAutoCondition && len(condiBean) > 0 {
if c, ok := condiBean[0].(map[string]interface{}); ok {
autoCond = builder.Eq(c)
} else {
ct := reflect.TypeOf(condiBean[0])
k := ct.Kind()
if k == reflect.Ptr {
k = ct.Elem().Kind()
}
if k == reflect.Struct {
var err error
autoCond, err = session.statement.buildConds(session.statement.RefTable, condiBean[0], true, true, false, true, false)
if err != nil {
return 0, err
}
} else {
return 0, ErrConditionType
}
}
}
st := &session.statement
var sqlStr string
var condArgs []interface{}
var condSQL string
cond := session.statement.cond.And(autoCond)
var doIncVer = (table != nil && table.Version != "" && session.statement.checkVersion)
var verValue *reflect.Value
if doIncVer {
verValue, err = table.VersionColumn().ValueOf(bean)
if err != nil {
return 0, err
}
cond = cond.And(builder.Eq{session.engine.Quote(table.Version): verValue.Interface()})
colNames = append(colNames, session.engine.Quote(table.Version)+" = "+session.engine.Quote(table.Version)+" + 1")
}
condSQL, condArgs, err = builder.ToSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
if st.OrderStr != "" {
condSQL = condSQL + fmt.Sprintf(" ORDER BY %v", st.OrderStr)
}
var tableName = session.statement.TableName()
// TODO: Oracle support needed
var top string
if st.LimitN > 0 {
if st.Engine.dialect.DBType() == core.MYSQL {
condSQL = condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
} else if st.Engine.dialect.DBType() == core.SQLITE {
tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
cond = cond.And(builder.Expr(fmt.Sprintf("rowid IN (SELECT rowid FROM %v %v)",
session.engine.Quote(tableName), tempCondSQL), condArgs...))
condSQL, condArgs, err = builder.ToSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
} else if st.Engine.dialect.DBType() == core.POSTGRES {
tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", st.LimitN)
cond = cond.And(builder.Expr(fmt.Sprintf("CTID IN (SELECT CTID FROM %v %v)",
session.engine.Quote(tableName), tempCondSQL), condArgs...))
condSQL, condArgs, err = builder.ToSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
} else if st.Engine.dialect.DBType() == core.MSSQL {
if st.OrderStr != "" && st.Engine.dialect.DBType() == core.MSSQL &&
table != nil && len(table.PrimaryKeys) == 1 {
cond = builder.Expr(fmt.Sprintf("%s IN (SELECT TOP (%d) %s FROM %v%v)",
table.PrimaryKeys[0], st.LimitN, table.PrimaryKeys[0],
session.engine.Quote(tableName), condSQL), condArgs...)
condSQL, condArgs, err = builder.ToSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
} else {
top = fmt.Sprintf("TOP (%d) ", st.LimitN)
}
}
}
if len(colNames) <= 0 {
return 0, errors.New("No content found to be updated")
}
sqlStr = fmt.Sprintf("UPDATE %v%v SET %v %v",
top,
session.engine.Quote(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 cacher := session.engine.getCacher(tableName); cacher != nil && session.statement.UseCache {
//session.cacheUpdate(table, tableName, sqlStr, args...)
session.engine.logger.Debug("[cacheUpdate] clear table ", tableName)
cacher.ClearIds(tableName)
cacher.ClearBeans(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]", 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()
}
func (session *Session) genUpdateColumns(bean interface{}) ([]string, []interface{}, error) {
table := session.statement.RefTable
colNames := make([]string, 0, len(table.ColumnsSeq()))
args := make([]interface{}, 0, len(table.ColumnsSeq()))
for _, col := range table.Columns() {
if !col.IsVersion && !col.IsCreated && !col.IsUpdated {
if session.statement.omitColumnMap.contain(col.Name) {
continue
}
}
if col.MapType == core.ONLYFROMDB {
continue
}
fieldValuePtr, err := col.ValueOf(bean)
if err != nil {
return nil, nil, err
}
fieldValue := *fieldValuePtr
if col.IsAutoIncrement {
switch fieldValue.Type().Kind() {
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int, reflect.Int64:
if fieldValue.Int() == 0 {
continue
}
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint, reflect.Uint64:
if fieldValue.Uint() == 0 {
continue
}
case reflect.String:
if len(fieldValue.String()) == 0 {
continue
}
case reflect.Ptr:
if fieldValue.Pointer() == 0 {
continue
}
}
}
if (col.IsDeleted && !session.statement.unscoped) || col.IsCreated {
continue
}
if len(session.statement.columnMap) > 0 {
if !session.statement.columnMap.contain(col.Name) {
continue
} else if _, ok := session.statement.incrColumns[col.Name]; ok {
continue
} else if _, ok := session.statement.decrColumns[col.Name]; ok {
continue
}
}
// !evalphobia! set fieldValue as nil when column is nullable and zero-value
if _, ok := getFlagForColumn(session.statement.nullableMap, col); ok {
if col.Nullable && isZero(fieldValue.Interface()) {
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 := session.engine.nowTime(col)
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.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
}