DB.Save(&p2)

	p2.Code = "dont_update"
	if DB.Save(&p2).Error == nil {
		t.Fatalf("An error from before update callbacks happened when update with invalid value")
	}

	if DB.Where("code = ?", "update_callback").First(&Product{}).Error != nil {
		t.Fatalf("Record Should not be updated due to errors happened in before update callback")
	}

		},
	}
	DB.Save(&lvl)

	var called int64
	DB.Callback().Query().After("gorm:query").Register("TestPreloadManyToManyCallbacks", func(_ *gorm.DB) {
		atomic.AddInt64(&called, 1)
	})

	DB.Preload("Level2s").First(&Level1{}, "id = ?", lvl.ID)

	if called != 3 {
		t.Errorf("Wanted callback to be called 3 times but got %d", called)
	}

	return tx
}

// Update updates column with value using callbacks. Reference: https://gorm.io/docs/update.html#Update-Changed-Fields
func (db *DB) Update(column string, value interface{}) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.Dest = map[string]interface{}{column: value}
	return tx.callbacks.Update().Execute(tx)
}

package callbacks

import (
	"fmt"
	"reflect"
	"strings"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

func Query(db *gorm.DB) {
	if db.Error == nil {
		BuildQuerySQL(db)

		if !db.DryRun && db.Error == nil {
			rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
			if err != nil {
				db.AddError(err)

package callbacks

import (
	"reflect"
	"strings"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

func SaveBeforeAssociations(create bool) func(db *gorm.DB) {
	return func(db *gorm.DB) {
		if db.Error == nil && db.Statement.Schema != nil {
			selectColumns, restricted := db.Statement.SelectAndOmitColumns(create, !create)

			// Save Belongs To associations

package callbacks

import (
	"fmt"
	"reflect"
	"strings"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

// BeforeCreate before create hooks
func BeforeCreate(db *gorm.DB) {
	if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && (db.Statement.Schema.BeforeSave || db.Statement.Schema.BeforeCreate) {
		callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {

	}

	if sqlTx, ok := tx.Statement.ConnPool.(gorm.TxCommitter); !ok || sqlTx == nil {
		t.Fatalf("Should return the underlying sql.Tx")
	}

	tx.Rollback()

	if err := DB.First(&User{}, "name = ?", "transaction").Error; err == nil {
		t.Fatalf("Should not find record after rollback, but got %v", err)
	}

	txDB := DB.Where("fake_name = ?", "fake_name")
	tx2 := txDB.Session(&gorm.Session{NewDB: true}).Begin()

func (db *DB) InstanceGet(key string) (interface{}, bool) {
	return db.Statement.Settings.Load(fmt.Sprintf("%p", db.Statement) + key)
}

// Callback returns callback manager
func (db *DB) Callback() *callbacks {
	return db.callbacks
}

// AddError add error to db
func (db *DB) AddError(err error) error {
	if err != nil {
		if db.Config.TranslateError {

				} else {
					clause.Expr{SQL: sql, Vars: vars}.Build(subdb.Statement)
				}
			} else {
				subdb.Statement.Vars = append(stmt.Vars, subdb.Statement.Vars...)
				subdb.callbacks.Query().Execute(subdb)
			}

			writer.WriteString(subdb.Statement.SQL.String())
			stmt.Vars = subdb.Statement.Vars
		default:
			switch rv := reflect.ValueOf(v); rv.Kind() {

package callbacks

import (
	"fmt"
	"reflect"
	"sort"
	"strings"

	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"gorm.io/gorm/schema"
	"gorm.io/gorm/utils"
)

// parsePreloadMap extracts nested preloads. e.g.
//
//	// schema has a "k0" relation and a "k7.k8" embedded relation
//	parsePreloadMap(schema, map[string][]interface{}{
//		clause.Associations: {"arg1"},
//		"k1":                {"arg2"},