CODEWITHSUNDEEP
djangodjango-views
Deano
Deano

Reputation: 12230

Django class based views access passed arguments

How can I log / print passed values to class based view?

Here is my class

class ProjectCreateView(CreateView):
    model = Project
    form_class = ProjectForm

I have tried appending the following to the class but I'm not seeing anything printed in the console. 

def get(self, request, *args, **kwargs):
    logging.info(request['name'])

I can't figure out what I'm doing wrong here

Upvotes: 0

Views: 1376

Answers (1)

Ian Price
Ian Price

Reputation: 7626

Using self.args and self.kwargs works in any generic class-based-view.

class ProjectCreateView(CreateView):
    model = Project
    form_class = ProjectForm

    def get(self, request, *args, **kwargs):
        project_name = self.kwargs.get('project_name', None)
        # Do something 
        return super(ProjectUpdateView, self).get(request, *args, **kwargs)

Looking at Classy Class Based Views, a great site for viewing the methods and attributes standard CBVs, shows us why this is. Take a look at this from the TemplateView source code: 

@classonlymethod
def as_view(cls, **initkwargs):
    """
    Main entry point for a request-response process.
    """
    # sanitize keyword arguments
    for key in initkwargs:
        if key in cls.http_method_names:
            raise TypeError("You tried to pass in the %s method name as a "
                            "keyword argument to %s(). Don't do that."
                            % (key, cls.__name__))
        if not hasattr(cls, key):
            raise TypeError("%s() received an invalid keyword %r. as_view "
                            "only accepts arguments that are already "
                            "attributes of the class." % (cls.__name__, key))
    def view(request, *args, **kwargs):
        self = cls(**initkwargs)
        if hasattr(self, 'get') and not hasattr(self, 'head'):
            self.head = self.get
        self.request = request
        self.args = args
        self.kwargs = kwargs
        return self.dispatch(request, *args, **kwargs)

The unpacked args and kwargs passed to the view method are stored as class attributes and available at any post-initialization methods.

Upvotes: 2

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