CODEWITHSUNDEEP
pythonhttpresttastypie
mimoralea
mimoralea

Reputation: 9986

How to move the Tastypie meta information out to the http headers

Does anyone know what's the 'best' way to move the meta information that gets returned with every request out to the http headers instead??

I was planning to do something like this:

def alter_list_data_to_serialize(self,request,data_dict):
        if isinstance(data_dict,dict):
            if 'meta' in data_dict:
                # grab each property of the data_dict['meta'] 
                #and put it on the request headers
            if 'objects' in data_dict:
                return data_dict['objects']

Any suggestions from someone that has already done something similar?

Upvotes: 1

Views: 160

Answers (2)

mimoralea
mimoralea

Reputation: 9986

In case anybody needs the same thing, this is how I was able to get it working... Thanks to GregM.

I created a class that inherits from tastypie ModelResource and made the adjustments to it. Then, all my resources use my class instead.

From his code, I just had to add a couple of try, except because when you GET a single item E.g. .../api/v1/user/2/ the meta doesn't exist and there is an AttributeError exception being thrown.

Then, you should be good to go.

class MyModelResource(ModelResource):
    def create_response(self, request, data, response_class=HttpResponse, **response_kwargs):
        try:
            stripped_data = data.get('objects')
        except AttributeError:
            stripped_data = data
        desired_format = self.determine_format(request)
        serialized = self.serialize(request, stripped_data, desired_format)
        response = response_class(content=serialized,
                                  content_type=build_content_type(desired_format),
                                  **response_kwargs)
        # Convert meta data to HTTP Headers
        try:
            for name, value in data.get('meta', {}).items():
                response['Meta-' + name.title().replace('_','-')] = str(value)
        except AttributeError:
            response['Meta-Empty'] = True
        return response

Again, full credit to Greg, thanks.

Upvotes: 1

GregM
GregM

Reputation: 1898

If you mean move the meta information from the serialized data tastypie returns to the HTTP headers of the response, I think you'll need to override the create_reponse method instead. You don't have an HttpResponse object available from alter_list_data_to_serialize. Something like this should get you started:

def create_response(self, request, data, response_class=HttpResponse, **response_kwargs):
    stripped_data = data.get('objects') or data
    desired_format = self.determine_format(request)
    serialized = self.serialize(request, stripped_data, desired_format)
    response = response_class(content=serialized,
                              content_type=build_content_type(desired_format),
                              **response_kwargs)
    # Convert meta data to HTTP Headers 
    for name, value in data.get('meta', {}).items():
        response[name] = str(value)
    return response

Upvotes: 1

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