Django migrations : relation already exists

I have trouble with django model migrations. I have some models in my app, and I already have some data inside. When I added some models in my application, and I run makemigrations, the app report that there is no change. I know that sometimes some errors came when migrate, so I delete django_migrations table in my database and run makemigrations again, and now program found my new fields.

The problem now is that if I run migrate system tell me that some tables already exist. (Which is ok and correct, because they do). I don't want to delete those tables, because I have data already inside.

I can't run migrate --fake, because program will think that I already have all the tables, which is not true.

So, I am looking for a way to tell the program : run migration, if table exist skip it. (--fake it)

Another question is why is this happening to me, that makemigrations don't recognise my changes (some cache problems,...)?

How about doing this way ?

python manage.py makemigrations

(Skip this step if you have already have migration file ready)

It will create migrations for that package lets say with a name like 0001_initial.py

Edit the file manually so that you delete all models there except that was already created in database.

Now you do a fake migration. This will sync your database with models.

python manage.py migrate --fake

Then run makemigrations again to have rest of the tables created along with a new migration file.

python manage.py makemigrations

Regarding your other question, Why makemigrations didn't recogonize your models can be because of reasons like:

1. Migrations for those changes are already there in some migration file.
2. You missed it to mention package_name in INSTALLED_APPS but i believe you did it here.