get parameter value in url Django

Question

I am new to Django, I want to receive a value from the URL and then use it in a filter, but I am having this problem.

where value is a field of a model, in the view.py

class ModelNumber(generics.ListAPIView):
    permission_classes = [
        IsAuthenticated,
    ]
    serializer_class = ModelSerializer 

    def get_queryset(self):
        queryset = Model.objects.all()
        value = self.request.query_params.get('value')
        return Model.objects.filter(value = value)

at urls.py

path('model_number/(?P<receipt_ballot>\w+)$', views.ModelNumber.as_view()),

and Model.py

class Model(models.Model):                                                              
    value = models.CharField("Number Value", max_length=12, null=True)

in the url

http://192.168.0.3:8080/model_number/001-000002/

the error :

Page not found (404)

The current path, /model_number/001-000002/, didn't match any of these.

Hi Tony, Welcome to SO! can you elaborate your question further as I am finding it difficult to understand the exact issue you are facing — Bernard 'Beta Berlin' Parah
– Bernard 'Beta Berlin' Parah, Commented May 9, 2020 at 4:37
@Bernard'BetaBerlin'Parah I already edited it, at the time of sending the parameter in the url I get an error Page not found (404) — TonyOH
– TonyOH, Commented May 9, 2020 at 4:41
you need to edit your url to show the value you want to get http://192.168.0.3:8080/?model_number=001-000002/. then you can get the value in with your current code — Bernard 'Beta Berlin' Parah
– Bernard 'Beta Berlin' Parah, Commented May 9, 2020 at 4:46
another way is to use kwargs like this ...self.kwargs['param_name'] — Bernard 'Beta Berlin' Parah
– Bernard 'Beta Berlin' Parah, Commented May 9, 2020 at 4:48

Biplove Lamichhane · Accepted Answer · 2020-05-09 05:09:23Z

2

You can use kwargs key defined in url to get the value of that key. Like:

    def get_queryset(self):
        # What you wanted
        value_of_url_parameter = self.kwargs.get('receipt_ballot')

        queryset = Model.objects.all()
        value = self.request.query_params.get('value')
        return Model.objects.filter(value = value)

edited May 9, 2020 at 5:09

answered May 9, 2020 at 4:42

Biplove Lamichhane

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4 Comments

Bernard 'Beta Berlin' Parah Over a year ago

seriously you should stick to one answer instead of waiting for people to post comments and answers and you keep making edits. If you're not sure chill. it's not a contest

Biplove Lamichhane Over a year ago

Haha!!! You think yourself a influencer!!! Thats good for you...

Biplove Lamichhane Over a year ago

Cheer it out bro, Let me explain what happend... Firstly, I thought it as function based views.py so, i answered it. By, the time I editted you did a comment. So, it seems to you like I am copying you. Yes, I agree I would have pointed that out.. Thats my mistake... Have a great day mate!!!

Bernard 'Beta Berlin' Parah Over a year ago

so I was right to make the assumption, I think you should leave the answer though, I already asked OP to accept yours. I am good mate. Please put back the complete answer

Bernard 'Beta Berlin' Parah · Accepted Answer · 2020-05-09 05:02:30Z

1

you need to modify your url to capture the parameter

http://192.168.0.3:8080?model_number=001-000002/

class ModelNumber(generics.ListAPIView):
    permission_classes = [
        IsAuthenticated,
    ]
    serializer_class = ModelSerializer 

    def get_queryset(self):
        queryset = Model.objects.all()
        value = self.request.query_params.get('value')
        return Model.objects.filter(value = value)

notice the question mark in the url

edited May 9, 2020 at 5:02

answered May 9, 2020 at 4:51

Bernard 'Beta Berlin' Parah

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5 Comments

Biplove Lamichhane Over a year ago

You could not use /001-000002/ after query parameter

Bernard 'Beta Berlin' Parah Over a year ago

so why not point that out instead of outrightly copying it and adding it to your answer?

Bernard 'Beta Berlin' Parah Over a year ago

I am not angry..Peace mate

Biplove Lamichhane Over a year ago

Also, I think value = self.request.query_params.get('value') it should be self.request.query_params.get('receipt_ballot') in this case

Bernard 'Beta Berlin' Parah Over a year ago

yes that's correct, I ignored the receipt_ballot to give a more generic answer, reason why I used value

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