mirror of
https://github.com/grafana/grafana.git
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398 lines
11 KiB
Go
398 lines
11 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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"strings"
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"xorm.io/builder"
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"xorm.io/core"
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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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if session.statement.lastError != nil {
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return 0, session.statement.lastError
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}
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v := rValue(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 = session.statement.buildUpdates(bean, 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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if err != nil {
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return 0, err
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}
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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 := session.engine.nowTime(col)
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args = append(args, val)
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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 i, colName := range incColumns.colNames {
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colNames = append(colNames, session.engine.Quote(colName)+" = "+session.engine.Quote(colName)+" + ?")
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args = append(args, incColumns.args[i])
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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 i, colName := range decColumns.colNames {
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colNames = append(colNames, session.engine.Quote(colName)+" = "+session.engine.Quote(colName)+" - ?")
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args = append(args, decColumns.args[i])
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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 i, colName := range exprColumns.colNames {
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switch tp := exprColumns.args[i].(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(colName)+"="+tp)
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case *builder.Builder:
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subQuery, subArgs, err := builder.ToSQL(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(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(colName)+"=?")
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args = append(args, exprColumns.args[i])
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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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var err error
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autoCond, err = session.statement.buildConds(session.statement.RefTable, 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.unscoped { // tag "deleted" is enabled
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autoCond1 := session.engine.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.cond.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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condSQL, condArgs, err = builder.ToSQL(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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if st.Engine.dialect.DBType() == core.MYSQL {
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condSQL = condSQL + fmt.Sprintf(" LIMIT %d", limitValue)
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} else if st.Engine.dialect.DBType() == core.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 = builder.ToSQL(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 if st.Engine.dialect.DBType() == core.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 = builder.ToSQL(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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}
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}
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if len(colNames) <= 0 {
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return 0, errors.New("no content found to be updated")
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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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tableAlias = fmt.Sprintf("%s AS %s", tableAlias, session.statement.TableAlias)
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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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// 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.Debug("[event]", tableName, " has after update processor")
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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 == core.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 {
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switch fieldValue.Type().Kind() {
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case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int, reflect.Int64:
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if fieldValue.Int() == 0 {
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continue
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}
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case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint, reflect.Uint64:
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if fieldValue.Uint() == 0 {
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continue
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}
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case reflect.String:
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if len(fieldValue.String()) == 0 {
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continue
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}
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case reflect.Ptr:
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if fieldValue.Pointer() == 0 {
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continue
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}
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}
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}
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if (col.IsDeleted && !session.statement.unscoped) || 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 && isZeroValue(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 := session.engine.nowTime(col)
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args = append(args, val)
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var 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.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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