Capturing values from url in post request in Django

Question

I want to capture url values from a url into my views in a post request.

My urls.py looks like below

from django.urls import path from . import views as projects_views

urlpatterns = [
    path('<str:project_id>/comments', projects_views.ProjectCommentList.as_view(), name="project_comments"),
]

and I want to capture the value project_id in my ListCreateAPIView. Get call works fine.

My views.py looks like below

class ProjectCommentList(generics.ListCreateAPIView):
    queryset = projects_models.Comment.objects.all()
    serializer_class = projects_serializers.CommentSerializer


    def get(self, request, project_id=None):
        queryset = self.filter_queryset(self.get_queryset())
        queryset = queryset.filter(project__id=project_id)

        page = self.paginate_queryset(queryset)
        if page is not None:
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)

        serializer = self.get_serializer(queryset, many=True)
        return Response(serializer.data)

    def perform_create(self, serializer):
        project_id = ###  Need "project_id" here
        project = projects_models.Project.objects.get(id=data.get('project_id'))
        serializer.save(project=project)

How can this be done?

Write a post method like you did for get?

Selcuk
– Selcuk

2019-08-22 04:44:13 +00:00
Commented Aug 22, 2019 at 4:44 — Selcuk
– Selcuk, Commented Aug 22, 2019 at 4:44
No, it still doesn't capture the value :(

Shahrukh Mohammad
– Shahrukh Mohammad

2019-08-22 04:48:22 +00:00
Commented Aug 22, 2019 at 4:48 — Shahrukh Mohammad
– Shahrukh Mohammad, Commented Aug 22, 2019 at 4:48

JPG · Accepted Answer · 2019-08-22 04:58:07Z

1

Use self.kwargs["project_id"] to get the project_id in perform_create() method,

class ProjectCommentList(generics.ListCreateAPIView):
    ...

    def perform_create(self, serializer):
        project_id = self.kwargs["project_id"]
        project = projects_models.Project.objects.get(id=data.get('project_id'))
        serializer.save(project=project)

answered Aug 22, 2019 at 4:58

JPG

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4 Comments

JPG Over a year ago

also, the request url?

Shahrukh Mohammad Over a year ago

i haven't separately declared the post method, i am using the same provided with ListCreateApiView, my request url is of the format /123/comments where i create a comment for the post with id 123.

JPG Over a year ago

whats the result of print("self.kwargs")?

Shahrukh Mohammad Over a year ago

For me if is replace (self, serializer) from the parameters of perform_create to (self, *args, **kwargs) I get the received kwargs as {} but self.kwargs has the value I was looking for, thanks a lot

dotslash227 · Accepted Answer · 2019-08-22 05:37:36Z

1

Create a scope varibale in your get method for the same class using "self"

def get(self, request, project_id=None):
        ...
        self.project_id = project_id
        ...

    def perform_create(self, serializer):
        ...
        project_id = self.project_id OR q = ExampleQuery.filter(project_id=self.project_id)
        ...

answered Aug 22, 2019 at 5:37

dotslash227

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3 Comments

Shahrukh Mohammad Over a year ago

i'm not sure if it'll work, as when we're doing a post call I don't think the get will be called so the self.project_id will not be set.

dotslash227 Over a year ago

If you are using a post call, then you can add self.project_id = project_id in post() as well. I am assuming, you are just using get()

Shahrukh Mohammad Over a year ago

No, my issue was where I can get the project_id from my url, I got the answer, its there in the self.kwargs . I am using both post and get.

anjaneyulubatta505 · Accepted Answer · 2019-08-22 06:37:38Z

1

self.kwargs contains the all keyword arguments provided in url path. so, we can access the project_id like self.kwargs['project_id']. Use a print statement like print(self.kwargs) to know what actually self.kwargs has.

def perform_create(self, serializer):
    # ... your code
    project_id = self.kwargs['project_id']
    # ... your code

edited Aug 22, 2019 at 6:37

answered Aug 22, 2019 at 6:32

anjaneyulubatta505

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