Foreign key constraint may cause cycles or multiple cascade paths?

Question

I have a problem when I try to add constraints to my tables. I get the error:

Introducing FOREIGN KEY constraint \'FK74988DB24B3C886\' on table \'Empl

Answer 1

This is an error of type database trigger policies. A trigger is code and can add some intelligences or conditions to a Cascade relation like Cascade Deletion. You may need to specialize the related tables options around this like Turning off CascadeOnDelete:

protected override void OnModelCreating( DbModelBuilder modelBuilder )
{
    modelBuilder.Entity().HasMany(i => i.Member).WithRequired().WillCascadeOnDelete(false);
}

Or Turn off this feature completely:

modelBuilder.Conventions.Remove();