How to access a variable in a function from another function in Django

Question

So, I'm trying to access the variable store in get_queryset() from get_context_data(). I though I can deal with that by using a global variable. But it didn't work too. Is there any other way to do that?

class StoreDetailView(ListView):

    def get_queryset(self):
        print(store) # an error happens
        ...


    def get_context_data(self, **kwargs):
        context = super(StoreDetailView, self).get_context_data(**kwargs)

        context['store'] = Store.objects.filter(domainKey=self.kwargs['store_domainKey'])
    context['store'] = get_object_or_404(Store, domainKey=self.kwargs['store_domainKey'])

        store = context['store']
        ...

@Lemayzeur The query starts from a value in kwargs. So, whatever I do in the middle, it needs to start in get_context_data, and needs to be done in get_queryset() to use pagination. — Jay P.
– Jay P., Commented May 14, 2018 at 18:55
You have access to self.kwargs['store_domainKey'] in get_queryset,, no need to do it in context_Data — Lemayzeur
– Lemayzeur, Commented May 14, 2018 at 18:57
actually, your get_queryset should handle the queryset at all, get_context_data is only to send more data to templates via context — Lemayzeur
– Lemayzeur, Commented May 14, 2018 at 18:58
Since I'm new to Django, I don't even know what I'm doing right now lol. The more I write, the more confused I am. I need to study more to figure out what each function is actually supposed to do. Thanks anyways! — Jay P.
– Jay P., Commented May 14, 2018 at 19:01

Lemayzeur · Accepted Answer · 2018-05-14 18:51:13Z

2

you can use self, to make it a class variable

# set variable
self.store = context['store']

# get variable
print(self.store)

edited May 14, 2018 at 18:51

Lemayzeur

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answered May 14, 2018 at 18:44

Satendra

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6 Comments

Lemayzeur Over a year ago

am I wrong or this doesn't exist in python? you meant self

Jay P. Over a year ago

It causes an error "name 'this' is not defined". Why is that?

Jay P. Over a year ago

@Lemayzeur self also shows an error 'StoreDetailView' object has no attribute 'store' as well

Satendra Over a year ago

@Jay yes use self. thanks @Lemayzeur for the update

Satendra Over a year ago

get_queryset method executing before get_context_data that's why you are getting error means you are trying to get value of variable which is not defined yet

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