"gorm.io/gorm/schema"
)

// Migrator returns migrator
func (db *DB) Migrator() Migrator {
	tx := db.getInstance()

	// apply scopes to migrator
	for len(tx.Statement.scopes) > 0 {
		tx = tx.executeScopes()
	}

	return tx.Dialector.Migrator(tx.Session(&Session{}))
}

// AutoMigrate run auto migration for given models
func (db *DB) AutoMigrate(dst ...interface{}) error {
	return db.Migrator().AutoMigrate(dst...)

}

func (cs *callbacks) Raw() *processor {
	return cs.processors["raw"]
}

func (p *processor) Execute(db *DB) *DB {
	// call scopes
	for len(db.Statement.scopes) > 0 {
		db = db.executeScopes()
	}

	var (
		curTime           = time.Now()
		stmt              = db.Statement
		resetBuildClauses bool
	)

	if len(stmt.BuildClauses) == 0 {
		stmt.BuildClauses = p.Clauses

func (db *DB) Scopes(funcs ...func(*DB) *DB) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.scopes = append(tx.Statement.scopes, funcs...)
	return tx
}

func (db *DB) executeScopes() (tx *DB) {
	scopes := db.Statement.scopes
	db.Statement.scopes = nil
	for _, scope := range scopes {
		db = scope(db)
	}
	return db
}

// Preload preload associations with given conditions

		curTable := stmt.Table
		if curTable == "" {
			curTable = clause.CurrentTable
		}

		switch v := arg.(type) {
		case clause.Expression:
			conds = append(conds, v)
		case *DB:
			v.executeScopes()

			if cs, ok := v.Statement.Clauses["WHERE"]; ok {
				if where, ok := cs.Expression.(clause.Where); ok {
					if len(where.Exprs) == 1 {
						if orConds, ok := where.Exprs[0].(clause.OrConditions); ok {