[Django]-Cannot import models from another app in Django

It’s definitely a circular import.

But i think is what you need is to use models as some sort of RetationFields(ForeignKey, ManyToManyField or OneToOneField) arguments. So you need to skip import and use as so:

# app1/models.py
class Model1(models.Model):
    relation_field = models.ForeignKey('app2.Model2')

From docs:

If you need to create a relationship on a model that has not yet been defined, you can use the name of the model, rather than the model object itself

To refer to models defined in another application, you can explicitly specify a model with the full application label

Just put str object as first argument to relation fields that leeds to <app_name>.<Model_name>.

Note: it’s better to avoid importing everything from module(from <module_name> import *)

If you want to import only some specific module then do not use import *.

It will take more time load your all library and so can affect the speed of your app also.

If you want to use few modules from your second app then just add module name instead of whole libraries something like this:

from app2.models import Module1, Module2

or it may be circular import issue as other clarify.

Thanks.

i use this code always and it’s work 🙂

from position_app.models import Member

You need to specify the model names you want to import, for ex from app1.models import ModelName1, ModelName2.

Make sure there is no name clash between one of your apps and one of the modules installed in your Python environment. If you use pip, you can run pip freezeto see a list of installed modules.

I had the same error when one of my apps was named ‘packaging’, and the packaging python module was installed.

I also face this problem when I try to import my model from another app in (django2.2)

But at last I Imported It and Its successfully working.

here is my two app:

INSTALLED_APPS = [
    ...

    'categories',
    'videos',
]

and this is the code for how I Imported it into videos/models.py file as a ForeignKey Connectivity

from django.db import models

class Videos(models.Model):
    categories = models.ForeignKey('categories.Categories', related_name='categories', on_delete=models.CASCADE)

If want to see my Categories Model from categories/models.py file, you can check this code otherwise neglect it

from django.db import models

class Categories(models.Model): 
    category_name = models.CharField(max_length=50)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

It is a circular import

In my case I needed the imported class not for a relation field, but for use it inside a method instead.
If that’s the case, I suggest to import inside the method, otherwise an AppRegistryNotReady(“Models aren’t loaded yet.”) is raised.

class Student(CustomUser):
""" Usuario alumno """
class Meta:
    verbose_name = "Alumno"
    verbose_name_plural = "Alumnos"

def get_current_school_class(self):
    """ Obtiene el curso actual de un alumno """
    from school.models import SchoolClass, StudentClass
    # proceed with the method...

it’s not necessary to import models from others apps
just put the app.models in the foreignkey field and that’s work 😉

app 1:

class model1(models.Model):
    field=models.field type ...

app 2:

class model2(models.Model):
    field=models.ForeignKey('app1.model1', on_delete. ...)

to avoid code correction 😀