Published in Laravel 5

Laravel 5 View Error Bags: Determining if a Message Bag Exists With hasBag

By John Koster

The hasBag method is used to determine if a MessageBag instance exists within the ViewErrorBag instance with the given $key. The $key is set to default unless it is changed. The following example will highlight the usage of the hasBag method.

#Signature

The signature of the hasBag method is:

1public function hasBag(

2    $key = 'default'

3);

#Example Use

The following example demonstrates the usage of the hasBag method is:

 1use Illuminate\Support\ViewErrorBag;

 2use Illuminate\Support\MessageBag;

 3

 4// Create a new ViewErrorBag instance.

 5$viewErrorBag = new ViewErrorBag;

 6

 7// Check if the 'default' MessageBag instance

 8// exists.

 9//

10// false

11$doesExist = $viewErrorBag->hasBag();

12$doesExist = $viewErrorBag->hasBag('default');

13

14// Check if a 'payments' MessageBag instance

15// exists.

16//

17// false

18$doesExist = $viewErrorBag->hasBag('payments');

19

20// Add a new 'payments' MessageBag instance.

21$viewErrorBag->put('payments', new MessageBag);

22

23// Check again if the 'payments' MessageBag instance

24// exists.

25//

26// true

27$doesExist = $viewErrorBag->hasBag('payments');

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