Question

I have the following query:

if (entities.User.Count(u => u.Id == ownerUserId && u.GroupId == null) == 0)

I want to check if User with Id == ownerUserId has its GroupId == null, but it doesn’t work.

Table:

User
----------------------------------------
Id                  | PK Not Null
GroupId             | FK to Group Table. CAN BE NULL.
...

I want to check if User with Id == ownerId has GroupId == null

Do you know why?

Answer 1

If you want the if condition to be true in the case you mentioned, you would need to check for greater than 0, rather than equal to 0.