//	// user -> User{Name: "non_existing", Email: "******@****.***"}
//
//	// assign email regardless of if record is found
//	db.Where(User{Name: "jinzhu"}).Assign(User{Email: "******@****.***"}).FirstOrInit(&user)
//	// user -> User{Name: "jinzhu", Age: 20, Email: "******@****.***"}
func (db *DB) FirstOrInit(dest interface{}, conds ...interface{}) (tx *DB) {