how to use required on insert validator for yii2?

问题

Can anyone have a suggestion about how to use "on" => "insert" validation in yii2? I have used

array('field_name', 'required', 'on'=>'insert')

in Yii1 but in yii2 it does not check if I set

['field_name', 'required', 'on'=>'insert']

. What is the problem here can you please explain? Thanks in advance.

回答1:

You should simply set your model's scenario before validation :

$model->scenario = 'insert';

Since with Yii2 :

By default, a model supports only a single scenario named default

Read more : http://www.yiiframework.com/doc-2.0/guide-structure-models.html#scenarios

回答2:

First define the scenario:

// scenario is set as a property
$model->scenario = 'insert';

OR

// scenario is set through configuration
$model = new User(['scenario' => 'insert']);

Then you may specify the rule as:

// for single field
['field_name', 'required', 'on' => 'insert'],

// for multiple fields
[['field_name1','field_name2'], 'required', 'on' => 'insert'],

For more details check: http://www.yiiframework.com/doc-2.0/guide-structure-models.html#validation-rules

来源：https://stackoverflow.com/questions/28981062/how-to-use-required-on-insert-validator-for-yii2