Create an optional foreign key using the fluid-API for Entity Framework 7

entity-framework-core fluid foreign-keys optional

Question

I'm trying to create an optional foreign key using Entity Framework 7 and the Fluid-API. In EF v6.x we had the option to add this using .WithOptional or .HasOptional, but I cant find any equivalent functionality in EF 7.. any ideas?

Br, Inx

Accepted Answer

Found the answer.. you can pass in "false" as a parameter to .IsRequired().. For instance:

            EntityShortcut<ContentEntity>()
            .HasMany(e => e.Children)
            .WithOne(e => e.Parent)
            .IsRequired();

That would be an requried relation

            EntityShortcut<ContentEntity>()
            .HasMany(e => e.Children)
            .WithOne(e => e.Parent)
            .IsRequired(false)

While that would NOT be a required relation.

FYI:

private static EntityTypeBuilder<T> EntityShortcut<T>() where T : class
{
    return _modelBuilder.Entity<T>();
}


Related

Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow
Is this KB legal? Yes, learn why
Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow
Is this KB legal? Yes, learn why