如何在Yii 2.0中验证数据库的输入字段？

Question

Suppose I have a field name id and I want the user to enter some integer in the id field but at the same time I want to check that id against the database whether it exists or not. If it exists then it should show some error.

Is there a function to achieve this in Yii 2.0?

Any help would be greatly appreciated. Thank you!

Answer 1

If this is from a model, you can have a unique rule to it in the validation rules.

In your model, you have a rules() function:

/**
 * @return array validation rules for model attributes.
 */
public function rules()
{
    return array(
        array('name', 'required'),
        array('some_id', 'unique'),
    );
}