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When to use upcasted parameters in Drupal routes?
Forms can use upcasted URL parameters too. In this example a form is using the account object and its ID is passed in from the URL. Note that this method of providing the entity data to a form is not used for entity forms, such as forms to add/edit/delete entity data.
How are parameters defined in a Drupal route?
In order to pass dynamic values from the URI to the controller you can use parameters. Parameters are defined in the route path using curly braces.
How to override an optional parameter in Drupal?
Supply the default value for the optional parameter in the “defaults” section: Now if we do a request to ‘/report’ the $issue_type parameter will default to ‘support-request’. We can override the value by supplying it on the URL, like ‘/report/bug’.
How to get the user object in Drupal?
In the controller, define an argument on the controller method with the same name to get this user object passed in: $user is an instance of Drupal\\ user\\Entity\\User and that object implements AccountInterface.
How to pass request parameters into a route?
The following special objects can be passed into a route’s controller method if there is a parameter with the correct typehint. The name of the parameter is not important. \\Symfony\\Component\\HttpFoundation\\Request: The raw Symfony request object. It is generally only useful if the controller needs access to the query parameters of the request.
How to extract the value of a route parameter?
To extract the parameter, you need to make the dynamic parameter in the route path so that you can extract the value of the parameter by parameter name. Do’nt understand? Don’t worry!
How to access a route parameter in angular?
For example, Your data will be lost after the page is refreshed. So it’s best to send the student ID in route parameter and get that parameter in the ngOnInit () method, which is one of the life cycle hooks in Angular. Now it’s clear why and where to use a dynamic parameter in the route path.