How to get form errors in Symfony as JSON-object with JMSSerializer

Question

I need to have a generic JSON-representation of errors for any form that I have.

I have already read other solutions like in how to return json encoded form errors in symfony. But I don't want to create one more service for task that is already can be solved by other bundle that I connected to my project.

I use JMSSerializerBundle in my project and I know that this bundle can handle Symfony form errors using FormErrorHandler. But now I can get only whole form serialization:

$errors = $form->getErrors();
$serializer = $this->get('jms_serializer');
$json = $serializer->serialize($errors, 'json');

This code will return me next JSON-object:

{
    "form": {
        "children": {
            "field1": [],
            "field2": [],
            "field_with_error": {
                "errors": ["Error text"]
            },
            "collection": {
                "child_form": [
                    {
                        "children": {
                            "field1": [],
                            "field2": []
                        }
                    }
                ]
            }
        }
    },
    "errors": []
}

But I need something like that (only fields with errors):

{
    "field_with_error": {
        "errors": ["Error text"]
    }
}

How can I achieve that? I looked at FOSRestBundle that has already solved this problem. But I didn't find how they did it.

Have a look at this : JMSSerializer + forms/arrays. You might have to write your own handler to "flatten" the array : Subscribing Handlers — slaur4
– slaur4, Commented Jan 26, 2015 at 11:10
I know what I can. But I want to use solution that is already in JMSSerializerBundle (FormErrorHandler). How can I do this? — Michael Sivolobov
– Michael Sivolobov, Commented Jan 27, 2015 at 13:11

Turdaliev Nursultan · Accepted Answer · 2015-11-10 15:42:32Z

0

Using following code you can get errors the same structure you want:

$handler = new FormErrorHandler($this->get('translator'));
$visitor = new JsonSerializationVisitor(new SerializedNameAnnotationStrategy(new CamelCaseNamingStrategy()));
$errors = json_encode($handler->serializeFormToJson($visitor, $editForm, array()));

Result

"{"children":{"title":{"errors":["This value should not be blank."]},"summary":{"errors":["Give your post a summary!"]},"content":{"errors":["Your post should have some content!"]}}}"

answered Nov 10, 2015 at 15:42

Turdaliev Nursultan

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1 Comment

Pierre de LESPINAY Over a year ago

This gives exactly the same output for me (jms/serializer 1.1.0 & SF 3.1.0)

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