Django form.save() does not update database

There could be several reasons why calling the save() method on a Django form does not update the database. Here are some things you can check:

1) Are you calling form.is_valid() before calling form.save()? form.save() will only update the database if form.is_valid() returns True. If form.is_valid() returns False, it means there are validation errors and the form data cannot be saved to the database.

2) Are there any errors in the server logs? Check the server logs to see if there are any error messages that may provide a clue as to why the database update is not working.

3) Are you updating an existing object or creating a new one? If you are updating an existing object, make sure that you are passing the object instance to the form's constructor or to the form.instance attribute before calling form.save(). If you don't pass the instance, Django will create a new object instead of updating the existing one.

4) Are you using the correct form instance? If you have multiple forms on the same page or in the same view, make sure you are calling the correct form's save() method.

5) Have you overridden the save() method on the form or model? If you have overridden the save() method, make sure you are calling the parent class's save() method to ensure that the object is actually saved to the database.

6) Is there a database transaction issue? If you are using a transaction to wrap your database operations, make sure that the transaction is committing the changes to the database.

By checking these possibilities, you should be able to find the issue and get form.save() to update the database as expected.