Server-side validation of a REQUIRED String Property in MVC2 Entity Framework 4 does not work

Question

I\'m trying to get server-side validation of an Entity Framework String Property to work. Other server-side validation such as data type validation and required dateTime and

Answer 1

Sometimes in database first approach in EF, may you update your column from not null to can be null using SQL query and use 'Update Model From Database...' (in EDMX right click) then maybe property of that entity not updated properly and so if you have some null data in that column ,in mapping ,violation occurs and this error shown.

To fix this; You can check the Nullable in Properties of that property of entity that you updated it.