Question

I have 2 tables for Users, one to hold User common info and one for extra info, they have one to one relation with UserId field.

Users:

UserId >> Primarykey auto increment  
UserName  
Password

UsersInfo:

UserId >> Primarykey  
MoreInfo

in my application , when the user register a new account we insert a row in Users table, and later if he wanted to change some info, we need to add to UsersInfo table.

The problem I am facing is that when I try to insert in the UsersInfo table it always tell me that UserId can’t be null. while I have this userId set before i call saveChanges.

var info = new UserInfo { UserId = userId, MoreInfo = text };
context.UserInfo.Add(info);

I don’t know if the problem in EF or in db, so any info or something to check will help.

Answer 1

This is not a solution but workaround.
It probably will work:

Users:
----
UserId >> Primary key & Auto increment
UserName
Password

UsersInfo:
----
UsersInfoId >> Primary key auto increment
UserId >> Foreign key & Unique constraint (for one-to-one relation)
MoreInfo