How to delete a record with a foreign key constraint?

Question

Started a new ASP.NET MVC 3 application and getting the following error:

The primary key value cannot be deleted because references to this key stil

Answer 1

In EF Core (3.1.8), the syntax is a bit different than the accepted answer but the same general idea, what worked for me is below:

modelBuilder.Entity()
            .HasMany(b => b.JournalEntries)
            .WithOne()
            .OnDelete(DeleteBehavior.Cascade);

In your query to select the item to delete or remove from the database you want to make sure that you are explicitly including the items as well, otherwise it will continue to throw a FK error, something like below.

var item = _dbContext.Journal.Include(x => x.JournalEntries).SingleOrDefault(x => x.Id == id);