Yii2 custom validation in Activeform - how to display an error message?

Question

Yii

There is an Activeform with an offer_maximum field that needs to be checked...

public function rules()
    {
        return [
      ...
            [ 'offer_minimum', 'number', 'min' => 100],
            ['offer_maximum', 'getPossibleMaximum'],
        ];
    }

        public function getPossibleMaximum($attribute){
            $this->addError($attribute, 'Недостаточно средств на балансе!');
        }

I expect that when filling in the offer_maximum field , an error message will be generated, as it happens for the offer_minimum field, but this rule is not added to the Ajax validation script.

Answer 1

1. do not call the validator as a getter,
"possibleMaximum" is a good option
"checkPossibleMaximum" is also "
getPossibleMaximum" - not correct
the model is transferred.
So

public function getPossibleMaximum($attribute){
            $this->addError($attribute, 'Недостаточно средств на балансе!');
        }

change to

public function possibleMaximum($modelKakNeNazovi,$attributeHotTiTresni){
            $this->addError($attributeHotTiTresni, 'Недостаточно средств на балансе!');
        }

PS: The example you described should work only on the server, for client-side validation everything is a little more complicated: https://www.yiiframework.com/doc/guide/2.0/ru/inpu...

Answer 2

If you are using some script other than the default, you may have forgotten to add the attribute to the validation list