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Question

I have an Entity named Items , then I have several entities that have a foreign key (NOT NULLABLE) to this table key ItemId .

Then I have another table named Soldiers that depends also on Items , but in this case it's a (NULLABLE) foreign key.

When I delete an item on the Items table I get an error regarding items that exist on the Soldiers table. If I don't have Soldiers with items I don't get the error, and all the other tables are correctly cascade deleted.

I guess I have to put something on the Fluent API to cascade delete also on this table, but I am not sure how to do it.

Thanks

Answer 1

You can configure it with WithCascadeOnDelete .

modelBuilder.Entity<Item>()
   .HasMany(i => i.Soldiers)
   .WithOptional(s => s.Item)
   .HasForeignKey(s => s.ItemId)
   .WillCascadeOnDelete(true);

Or

modelBuilder.Entity<Soldier>()
   .HasOptional(s => s.Item)
   .WithMany() // -> use i => i.Soldiers if any
   .HasForeignKey(i => i.ItemId)
   .WillCascadeOnDelete(true);