If you want to make sure a rule is always applied, you may configure the skip On Empty and/or skip On Error properties to be A standalone validator is a class extending yii\validators\Validator or its child class.You may implement its validation logic by overriding the yii\validators\Validator::validate Attribute() method.

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For example, the number validator supports too Big and too Small to describe the validation failure when the value being validated is too big and too small, respectively.

You may configure these error messages like configuring other properties of validators in a validation rule.

When yii\base\Model::validate() is called, it will call two methods that you may override to customize the validation process: To validate attributes only when certain conditions apply, e.g.

the validation of one attribute depends on the value of another attribute you can use the when property to define such conditions. The following examples shows how to trim the spaces in the inputs and turn empty inputs into nulls by using the trim and default core validators: You may also use the more general filter validator to perform more complex data filtering.

Use a trusted server to communicate with the App Store.

Using your own server lets you design your app to recognize and trust only your server, and lets you ensure that your server connects with the App Store server.A complete processing of user input is shown in the following example code, which will ensure only integer values are stored in an attribute: for values that are not bound to any model.If you only need to perform one type of validation (e.g.If an attribute fails the validation, call yii\base\Model::add Error() to save the error message in the model, like you do with inline validators.For example the inline validator above could be moved into new components/validators/Country Validator class.

Given a model populated with user inputs, you can validate the inputs by calling the yii\base\Model::validate() method.

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Using your own server lets you design your app to recognize and trust only your server, and lets you ensure that your server connects with the App Store server.

A complete processing of user input is shown in the following example code, which will ensure only integer values are stored in an attribute: for values that are not bound to any model.

If you only need to perform one type of validation (e.g.

If an attribute fails the validation, call yii\base\Model::add Error() to save the error message in the model, like you do with inline validators.

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