compare validation rule fails in yii2

Question

I am using yii2, I have three fields num1,num2,num3. I want to add validation, num2 input should be greater than num1 input, so I am using compare rule. Here is the code

        return [
            [['num1', 'num2', 'num3'], 'required'],
            [['num1', 'num2', 'num3'], 'integer', 'min' => self::MIN_SIZE, 'max' => self::MAX_SIZE],  
            ['num2', 'compare', 'compareAttribute' => 'num1', 'operator' => '>'],
        ];
    }

Issue: It works if I add 8,9,10 in the inputs but fails If I add 8,10,11 in the inputs. I have tried adding input type as number.

Answer 1

The operands are compared as strings by default in yii\validators\CompareValidator. That's why '10' is considered less than '8'.

You need to set CompareValidator::$type property to compare operands as numbers.

Your rule should look like this:

[
    'num2',
    'compare',
    'compareAttribute' => 'num1',
    'operator' => '>',
    'type' => \yii\validators\CompareValidator::TYPE_NUMBER
]