I'm trying to create an optional foreign key using Entity Framework 7 and the Fluent-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
- 1Look in the docs: ef.readthedocs.org/en/latest/modeling/…Gert Arnold– Gert Arnold2016-01-03 18:41:46 +00:00Commented Jan 3, 2016 at 18:41
- Docs were moved to docs.efproject.netMatt R– Matt R2017-02-05 01:05:29 +00:00Commented Feb 5, 2017 at 1:05
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1 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>(); }