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Reference

Default Types

  • Since 1.1.0.

When you raise your own exceptions implementing Mezzio\ProblemDetails\Exception\ProblemDetailsExceptionInterface you will always be in control of all the properties returned as part of the response payload, including the status, type, title, detail, etc. items.

However, there are some use cases in which this library will have to infer some of those values.

The main situations in which this can happen are:

  • When an exception not implementing ProblemDetailsExceptionInterface is captured by the ProblemDetailsMiddleware.
  • When the ProblemDetailsNotFoundHandler is executed.

In these two cases, the title and type properties will be inferred from the status code, which will usually be 500 in the first case and 404 in the second one.

To be more precise, the ProblemDetailsMiddleware will use the exception's error code when debug is true, and 500 otherwise.

Because of this, in any of those cases, you will end up with values like https://httpstatus.es/404 or https://httpstatus.es/500 for the type property.

Configuring custom default types

Since the type property will usually be used by API consumers to uniquely identify an error, you might want to be able to provide your own custom values for the type property.

In order to do that, this library lets you configure the default type value to be used for every status code when some of the cases listed above happens.

return [
    'problem-details' => [
        'default_types_map' => [
            404 => 'https://example.com/problem-details/error/not-found',
            500 => 'https://example.com/problem-details/error/internal-server-error',
        ],
    ],
];

If this configuration is found, it will be consumed by the ProblemDetailsResponseFactoryFactory and your custom values will be used when the type was not explicitly provided.