PyCharm stopped autofill suggestions.

Recently my PyCharm, stopped suggestions for my django project. It is not suggesting model fields when I type. Here is example,

my models.py file,

class User(model):
    field_one = django.field
    field_two = django.field

please ignore the info as it is not actual model,

so whenever I try to use

user = User.objects.get(field_one='something')

my PyCharm used to give me fields suggestion inside .get() when my curser was inside the parenthesis like field_one, field_two and other objects/fields from super class etc but now it is not giving me any suggestion. It is painful because I have Foreign Keys in some of my model which has other foreign keys inside. It was easy to write queries but now, it is not easy as my models are big and contains different connections by foreign keys.

I have tried changing preference, python interpreter, django support etc solutions that I have found online. PyCharm is suggesting me other python codes and autofills so if I write,

user = User.objects.

it will give me suggestions of methods like get(), filter(), get_or_create() etc but not field's inside the method.