I have a Website table that has a foreign key to a Client table. A Website isn't always going to have an associated Client but when I save a Website without specifying a client then it errors out, as Website.ClientID is an int32 (not nullable) and is set to 0.
I tried changing the relationship in my EF diagram to be an
* next to Website and a 0..1 next to Client but then it gives an error saying that it can't do 0..1 for ClientID because it's not nullable. I then changed Website.ClientID to be nullable, however now it gives this error:
TothSolutions.msl(69,10) : error 3031: Problem in mapping fragments starting at line 69:Non-nullable column Website.ClientID in table Website is mapped to a nullable entity property.
How do I set up a foreign key relationship where the dependent object is nullable?
I forgot to take the
not null constraint off the column in the database.
I got this problem as well but fixed it by removing the table from my model and adding it again.