Question

I have an Entity called User. User should be used in multilingual environment
So User looks like

    class User{
 virtual ICollection<TextEntry> Name {get; set;}
 virtual ICollection<TextEntry> Info {get; set;}
...
}

class TextEntry
{
int id {get; set;}
string Text {get; set;}
string Culture {get;set;}
}

Also I have a rule for user

    modelBuilder.Entity<User>()
        .HasMany(q => q.Name)
        .WithOptional()
        .WillCascadeOnDelete();

    modelBuilder.Entity<User>()
        .HasMany(q => q.Info)
        .WithOptional()
        .WillCascadeOnDelete();

With this rules EF could not create model
Esception message is “Introducing FOREIGN KEY constraint ‘User_Info’ on table ‘TextEntry’ may cause cycles or multiple cascade paths. Specify ON DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY constraints.\r\nCould not create constraint. See previous errors.”

Without this rules I get an exception when trying delete user, because of references constraints.

How it possible to solve this wihout creating additional entity for User.Info data?

Answer 1

This error is from SQL Server, not from Entity Framework. Entity Framework is creating one table for both occurrences of TextEntry.

Probably the easiest solution is to derive from TextEntry two other classes, make TextEntry abstract and map these two to distinct tables (TPC).