How to force validators not to work on an empty field?

Question

Yii

Do not save the model because the string and unique validators return false if the field is empty.
How to overcome?

Answer 1

well, unique and should return false if there is already a record with such an empty field. As a matter of fact, without going into the details of the fact that you have some kind of crap there, look towards skipOnEmpty

[['field_name'], 'string', 'skipOnEmpty' => true], //у стринг валидатора по-умолчанию и так 'skipOnEmpty' => true

Answer 2

Why validate empty fields?
Read about validation Checking incoming data