How to trace circular import error Django never solved!! Please sort this out.

[Sai]

I am working Django rest framework api project, where I had multiple apps in the project. I got a circular import error when I am adding the app URLs to the main URLs. I Tried everything checked spellings, checked app structure but no use. Its been really frustrating with issue..please help to solve the problem. The app is working fine when I take off newly added line `path("covid/", include("Covid.urls")),`

I am using python3.6, django 3.0.4 and django-rest-framework 3.11.0

Here is project 

**urls.py** 

           

    from django.contrib import admin

    from django.conf.urls import url

    from django.urls import path, include

    from rest_framework_swagger.views import get_swagger_view

    

    schema_view = get_swagger_view(title='TmmrwInc API Documentation')

    

    urlpatterns = [

        path('admin/', admin.site.urls),

        # path('', include('django.contrib.auth.urls')),

        # path('rest_auth/', include('rest_auth.urls')),

        path('api/password_reset/',

            include('django_rest_passwordreset.urls', namespace='password_reset')),

        # url(r'^invitations/', include('invitations.urls', namespace='invitations')),

        path('', include('rest_invitations.urls')),

        path("", include("UserAuth.urls")),

        path("doctors/", include("Administration.urls")),

        path("appointments/", include("Appointments.urls")),

        path("messaging/", include("messaging.urls")),

        path("meet/", include("meet.urls")),

        path("api_documentation/", schema_view),

        path("covid/", include("Covid.urls")),

    ]

This is app **urls.py** file

    from django.urls import path

    from . import views

    

    app_name = 'Covid'

    

    urlpatterns = [

        path('event/', views.EventBookingView.as_view()),

    ]

**settings.py** installed apps 

    ALLOWED_HOSTS = ['*']

    

    

    # Application definition

    

    INSTALLED_APPS = [

        "django.contrib.admin",

        "django.contrib.auth",

        "django.contrib.sites",

        "django.contrib.contenttypes",

        "django.contrib.sessions",

        "django.contrib.messages",

        "django.contrib.staticfiles",

        "UserAuth",

        "rest_framework",

        "corsheaders",

        'rest_framework.authtoken',

        'rest_auth',

        'Appointments',

        'messaging',

        'Administration',

        'channels',

        'invitations',

        'rest_invitations',

        'django_rest_passwordreset',

        'django_celery_beat',

        'meet',

        'rest_framework_swagger',

         'Covid',

    

    ]

This is a project structure

[Project Structure][1]

  [1]: https://i.stack.imgur.com/E8qro.jpg

[Mike Dewhirst]

On 22/07/2020 10:08 am, Sai wrote:
> I am working Django rest framework api project, where I had multiple
> apps in the project. I got a circular import error when I am adding
> the app URLs to the main URLs. I Tried everything checked spellings,
> checked app structure but no use. Its been really frustrating with
> issue..please help to solve the problem. The app is working fine when
> I take off newly added line `path("covid/", include("Covid.urls")),`

I can't help specifically but generally maybe. I have never been able to
trace circular imports. Instead I just remove them and drop them into
the methods which need them.

At first glance "from django.conf.urls import url" seems to be unused.
I'd try again without it or if I missed something you could add re_path
to the django.urls imports.

Hope I haven't steered you down a blind alley.

M

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[Chaitanya Sai]

Can any one Look into this thing ??????

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[Chaitanya Sai]

Hello Django users, 

Is there not even single person who can solve this issue??????????????

On Tue, Jul 21, 2020 at 8:09 PM Sai <chaitu....@gmail.com> wrote:

--

[sandeep kumar]

I have faced this issue atleast 100 times..:)

Her are the steps (sorry, I could not find a better way):

1. comment urls in urls.py (inside individual app)

2. check if you still have issue

2a. if you do not have issue, then you probably have not defined views for some of the urls

2b. if you still see the error, comment 'impot views' statement.

3a. if the issue is gone after commenting 'import views' then check views.py file, it must have some typos (e.g., misalignment, accidental copying of some special character etc.)

3b. if the issue is not gone even after commenting 'import views', let me know. I am not sure I have reached that stage ever..:)

Hope this helps.

Thanks,

Sandeep

--

Dr. Sandeep Kumar,

Postdoctoral Researcher,

Lunenfeld Tanenbaum Research Institute,

Mount Sinai Hospital,

600 University Ave,

Toronto, Ontario

Canada

http://individual.utoronto.ca/sandeepkumar/

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[Liu Zheng]

Hi,

Probably not enough to look at urls.py files only. My guess: Do you use ‘reverse’ function anywhere in covid app? If so, here’s a circular import:

urls.py imports covid urls -> covid urls import covid views -> one covid view uses reverse -> reverse import urls.py of the project (to look up the url with the end point name).

A quick fix will be using lazy_reverse instead of reverse.

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[Chaitanya Sai]

Thanks for your reply guys. I figured it out. I have typo of serializer name in serilizers.py which is causing the error.

Damn, I spend 4 hours into this. 

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