Invalid query is generated: For field=BitField

Hi all, thanks for your work on this. Noticed the below when testing version 2.8.1 with not yet supported Django 3.1.1. However, it works as expected up to version 3.0.10. Just adding this here fwiw or any that misinterpret “Django 2.2 or newer” 😃.

models.py:

class Book(models.Model):
    BitField = models.BooleanField(db_column="BitField", default=0)

query: queryset = Book.objects.filter(BitField=True)

Generated T-SQL (Django 3.1.1):

SELECT TOP 10 dbo.Book.PK, dbo.Book.BitField
FROM dbo.Book
WHERE NOT dbo.Book.BitField

-- For Django up to 3.0.10 the correct T-SQL is generated:
-- ... WHERE dbo.Book.BitField = 0

Error: An expression of non-boolean type specified in a context where a condition is expected, near ‘BitField’.

[MadPepe]

Had the same issue. We had to downgrade to 3.0.10 version of Django and the problem disappeared.

Dependencies (Not working):

• Django==3.1
• django-mssql-backend==2.8.1
• pyodbc==4.0.30

[sekar-p]

Issue exists in django3.1.6 also. When we can expect the fixed version in PyPI