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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"
"xorm.io/builder"
"xorm.io/xorm/caches"
"xorm.io/xorm/internal/utils"
"xorm.io/xorm/schemas"
)
func (session *Session) cacheUpdate(table *schemas.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.logger.Debugf("[cache] new sql: %v, %v", 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.Debugf("[cache] get cache sql: %v, %v", newsql, args[nStart:])
ids, err := caches.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([]schemas.PK, 0)
for rows.Next() {
var res = make([]string, len(table.PrimaryKeys))
err = rows.ScanSlice(&res)
if err != nil {
return err
}
var pk schemas.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.Debugf("[cache] find updated id: %v", 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 := utils.SplitNNoCase(sqlStr, "where", 2)
if len(sqls) == 0 || len(sqls) > 2 {
return ErrCacheFailed
}
sqls = utils.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]
colName = session.engine.dialect.Quoter().Trim(colName)
colName = schemas.CommonQuoter.Trim(colName)
if col := table.GetColumn(colName); col != nil {
fieldValue, err := col.ValueOf(bean)
if err != nil {
session.engine.logger.Errorf("%v", err)
} else {
session.engine.logger.Debugf("[cache] set bean field: %v, %v, %v", bean, colName, fieldValue.Interface())
if col.IsVersion && session.statement.CheckVersion {
session.incrVersionFieldValue(fieldValue)
} else {
fieldValue.Set(reflect.ValueOf(args[idx]))
}
}
} else {
session.engine.logger.Errorf("[cache] ERROR: column %v is not table %v's",
colName, table.Name)
}
}
session.engine.logger.Debugf("[cache] update cache: %v, %v, %v", tableName, id, bean)
cacher.PutBean(tableName, sid, bean)
}
}
session.engine.logger.Debugf("[cache] clear cached table sql: %v", 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()
}
if session.statement.LastError != nil {
return 0, session.statement.LastError
}
v := utils.ReflectValue(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, err = session.statement.BuildUpdates(v, 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)
if session.engine.dialect.URI().DBType == schemas.ORACLE {
args = append(args, t)
} else {
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.IncrColumns
for i, colName := range incColumns.ColNames {
colNames = append(colNames, session.engine.Quote(colName)+" = "+session.engine.Quote(colName)+" + ?")
args = append(args, incColumns.Args[i])
}
// for update action to like "column = column - ?"
decColumns := session.statement.DecrColumns
for i, colName := range decColumns.ColNames {
colNames = append(colNames, session.engine.Quote(colName)+" = "+session.engine.Quote(colName)+" - ?")
args = append(args, decColumns.Args[i])
}
// for update action to like "column = expression"
exprColumns := session.statement.ExprColumns
for i, colName := range exprColumns.ColNames {
switch tp := exprColumns.Args[i].(type) {
case string:
if len(tp) == 0 {
tp = "''"
}
colNames = append(colNames, session.engine.Quote(colName)+"="+tp)
case *builder.Builder:
subQuery, subArgs, err := session.statement.GenCondSQL(tp)
if err != nil {
return 0, err
}
colNames = append(colNames, session.engine.Quote(colName)+"=("+subQuery+")")
args = append(args, subArgs...)
default:
colNames = append(colNames, session.engine.Quote(colName)+"=?")
args = append(args, exprColumns.Args[i])
}
}
if err = session.statement.ProcessIDParam(); err != nil {
return 0, err
}
var autoCond builder.Cond
if !session.statement.NoAutoCondition {
condBeanIsStruct := false
if 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
}
condBeanIsStruct = true
} else {
return 0, ErrConditionType
}
}
}
if !condBeanIsStruct && table != nil {
if col := table.DeletedColumn(); col != nil && !session.statement.GetUnscoped() { // tag "deleted" is enabled
autoCond1 := session.statement.CondDeleted(col)
if autoCond == nil {
autoCond = autoCond1
} else {
autoCond = autoCond.And(autoCond1)
}
}
}
}
st := session.statement
var (
sqlStr string
condArgs []interface{}
condSQL string
cond = session.statement.Conds().And(autoCond)
doIncVer = isStruct && (table != nil && table.Version != "" && session.statement.CheckVersion)
verValue *reflect.Value
)
if doIncVer {
verValue, err = table.VersionColumn().ValueOf(bean)
if err != nil {
return 0, err
}
if verValue != nil {
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")
}
}
if len(colNames) <= 0 {
return 0, errors.New("No content found to be updated")
}
condSQL, condArgs, err = session.statement.GenCondSQL(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 != nil {
limitValue := *st.LimitN
switch session.engine.dialect.URI().DBType {
case schemas.MYSQL:
condSQL = condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
case schemas.SQLITE:
tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
cond = cond.And(builder.Expr(fmt.Sprintf("rowid IN (SELECT rowid FROM %v %v)",
session.engine.Quote(tableName), tempCondSQL), condArgs...))
condSQL, condArgs, err = session.statement.GenCondSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
case schemas.POSTGRES:
tempCondSQL := condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
cond = cond.And(builder.Expr(fmt.Sprintf("CTID IN (SELECT CTID FROM %v %v)",
session.engine.Quote(tableName), tempCondSQL), condArgs...))
condSQL, condArgs, err = session.statement.GenCondSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
case schemas.MSSQL:
if st.OrderStr != "" && table != nil && len(table.PrimaryKeys) == 1 {
cond = builder.Expr(fmt.Sprintf("%s IN (SELECT TOP (%d) %s FROM %v%v)",
table.PrimaryKeys[0], limitValue, table.PrimaryKeys[0],
session.engine.Quote(tableName), condSQL), condArgs...)
condSQL, condArgs, err = session.statement.GenCondSQL(cond)
if err != nil {
return 0, err
}
if len(condSQL) > 0 {
condSQL = "WHERE " + condSQL
}
} else {
top = fmt.Sprintf("TOP (%d) ", limitValue)
}
}
}
var tableAlias = session.engine.Quote(tableName)
var fromSQL string
if session.statement.TableAlias != "" {
switch session.engine.dialect.URI().DBType {
case schemas.MSSQL:
fromSQL = fmt.Sprintf("FROM %s %s ", tableAlias, session.statement.TableAlias)
tableAlias = session.statement.TableAlias
default:
tableAlias = fmt.Sprintf("%s AS %s", tableAlias, session.statement.TableAlias)
}
}
sqlStr = fmt.Sprintf("UPDATE %v%v SET %v %v%v",
top,
tableAlias,
strings.Join(colNames, ", "),
fromSQL,
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() {
session.incrVersionFieldValue(verValue)
}
}
if cacher := session.engine.GetCacher(tableName); cacher != nil && session.statement.UseCache {
// session.cacheUpdate(table, tableName, sqlStr, args...)
session.engine.logger.Debugf("[cache] clear table: %v", 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.Debugf("[event] %v has after update processor", tableName)
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 == schemas.ONLYFROMDB {
continue
}
fieldValuePtr, err := col.ValueOf(bean)
if err != nil {
return nil, nil, err
}
fieldValue := *fieldValuePtr
if col.IsAutoIncrement && utils.IsValueZero(fieldValue) {
continue
}
if (col.IsDeleted && !session.statement.GetUnscoped()) || col.IsCreated {
continue
}
// if only update specify columns
if len(session.statement.ColumnMap) > 0 && !session.statement.ColumnMap.Contain(col.Name) {
continue
}
if session.statement.IncrColumns.IsColExist(col.Name) {
continue
} else if session.statement.DecrColumns.IsColExist(col.Name) {
continue
} else if session.statement.ExprColumns.IsColExist(col.Name) {
continue
}
// !evalphobia! set fieldValue as nil when column is nullable and zero-value
if _, ok := getFlagForColumn(session.statement.NullableMap, col); ok {
if col.Nullable && utils.IsValueZero(fieldValue) {
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.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
}