[Django]-Django makemigrations not detecting new model

I’ve met this problem during development and this combination helps me:

python manage.py makemigrations mymodule

This command create migrations for the specific module. It should be in INSTALLED_APPS, but you’ll get warning if it’s not in there.

python manage.py migrate

Also, mention answer by xiaohen, I’ve create packages with PyCharm, so I’ve got init.py file by default.

I encountered similar issue (“No changes detected” when adding new models) when using Django 1.11, and solved by importing the new models (actually better to import all models) in the __init__.py in models package:

from .student import Student
from .teacher import Teacher

It’s written here:

• https://docs.djangoproject.com/en/1.11/topics/db/models/#organizing-models-in-a-package

Ensure your app is registered in the settings.py,
if so then try running:

 python manage.py makemigrations "app_name"

You have to run python manage.py makemigrations first, Second, you have to run python manage.py migrate to sync db.

If you mkdir a folder to save your model, you have to add it to __init__.py.

This happens when you forget to register your app in setting.py file.

Another issue may be if you have two ForeignKeys that point to the same model without a related_name to distinguish between them. E.g.

fk1 = models.ForeignKey(OtherModel)
fk2 = models.ForeignKey(OtherModel)

Django should give you a warning: HINT: Add or change a related_name argument to the definition for 'app.Model.fk1' or 'app.Model.fk2'.

But I didn’t see it until I restarted django.

I want to also add apart from the answers provided above if problem still not solved, please do ensure your migrations dir is available in your app folder if not available ensure to create one and make sure to create an

__init__.py

file inside so that python interpreter will be able to identify that the dir is python dir. Please edit if I might have misused some terminologies. Hope this helps.

Also, note that when the abstract attribute is set to True in the models Meta class, the model will be ignored by makemigrations.

Check that the atrribute is set to False or remove it altogether.

I would like to add: If the model Meta class has an app_label, and it is different to the INSTALLED_APPS label – it will fail.