How can i add my own attribute in django as_view() method?

Question

I want to add my own attribute 'fileName' inside method 'as_view()'

path('dialogs/', CodeResponseView.as_view(fileName='Dialogs.py')),

Django give's me an arror:

TypeError: CodeResponseView() received an invalid keyword 'fileName'. as_view only accepts arguments that are already attributes of the class.

Answer 1

The error tells you exactly what you should do:

as_view only accepts arguments that are already attributes of the class

So add fileName as attribute to your class:

class CodeResponseView(View):
    fileName = ''

    # rest of view code can now use the fileName attribute

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['file'] = self.fileName
        return context

Now, any url pattern passing fileName to as_view() will work:

path('dialogs/', CodeResponseView.as_view(fileName='Dialogs.py')),
path('alerts/', CodeResponseView.as_view(fileName='Alerts.py')),

Answer 2

you can add your attribute. your in case 'filename' as in context.

if you want to pass and use at templates side is help full when you use DetailView , ListView , CreateView , TemplateView etc generic-class-base view

there is two way

---

1. first way is pass argument in as_view function see here not need to pass at view side or view if you have model you can also pass at urls.py in another keyword arguments model=< Your model name >

urls.py

path('dialogs/', CodeResponseView.as_view(extra_context={'fileName':'Dialogs.py')),

Then you can access filename attribute at your template side like

Your Template file

<h1> My file name is : {{ filename }} </h1>

Output:

My file name is Dialogs.py

---

2. Second way assign extra_context dictionary in your view class where you define at view.py file

urls.py

path('dialogs/', CodeResponseView.as_view()),

views.py Here you not need to override a get_context_data method for pass filename

class CodeResponseView(DetailView):
    extra_context={'filename':'Your File name'}
    model=models.<model-name> # here your model name 

Then you can access filename attribute at your template side like

Your Template file

<h1> My file name is : {{ filename }} </h1>

Output:

My file name is Your File name

---

• Here i put a link of django docs of extra_context and pre-define variable
  1. https://docs.djangoproject.com/en/3.0/ref/class-based-views/mixins-simple/

This stuff may help you let me know it's answer is right or wrong .....