插入语句与外键约束冲突？ 为什么这是我的问题？

Question

I know this gets asked a lot, but in my case, I feel like it shouldn't be an issue. My table has 2 foreign keys that allow for nulls, so I should be able to leave them blank, right?

My insert statement:

INSERT INTO Child (ChildID, FirstName, MiddleName, LastName, Gender, DOB)
VALUES (@ChildID, @FirstName, @MiddleName, @LastName, @Gender, @DOB)

I was hoping it would just leave the final 2 columns blank, for them to be filled out later, but all it does is give me an error.

The INSERT statement conflicted with the FOREIGN KEY constraint "FK__Child__ChildGuar__2B3F6F97". The conflict occurred in database "ChildCare", table "dbo.ChildGuardian", column 'ChildGuardianID'.

I can re-work the database a little, if necessary.

Answer 1

Have you tried passing in NULL for those values? You shouldn't have to pass anything, but it may help with troubleshooting.

I'd also check that Child.ChildGuardianID isn't an identity, and that it doesn't have a default value.