add support for FIELDNAME_id for foreignkey/onetoonefield

test/test-data/check-model-relations.test

@@ -15,6 +15,20 @@ publisher = Publisher()
 reveal_type(publisher.books)  # E: Revealed type is 'django.db.models.query.QuerySet[main.Book]'
 [out]
 
+[case testEveryForeignKeyCreatesFieldNameWithIdAttribute]
+from django.db import models
+
+class Publisher(models.Model):
+    pass
+
+class Book(models.Model):
+    publisher = models.ForeignKey(to=Publisher, on_delete=models.CASCADE,
+                                    related_name='books')
+
+book = Book()
+reveal_type(book.publisher_id)  # E: Revealed type is 'builtins.int'
+[out]
+
 [case testOneToOneField]
 from django.db import models
 
@@ -30,3 +44,15 @@ reveal_type(profile.user)  # E: Revealed type is 'main.User*'
 user = User()
 reveal_type(user.profile)  # E: Revealed type is 'main.Profile'
 
+[case testOneToOneFieldAttrWithUnderscoreID]
+from django.db import models
+
+class User(models.Model):
+    pass
+
+class Profile(models.Model):
+    user = models.OneToOneField(to=User, on_delete=models.CASCADE, related_name='profile')
+
+profile = Profile()
+reveal_type(profile.user_id)  # E: Revealed type is 'builtins.int'
+[out]