EF-core: delete related entities

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There are 2 tables:

public class Info
{
    [Key]
    public int id { get; set; }
    public int name { get; set; }
    public int surname { get; set; }
}

public class Client
{
    [Key]
    public int id { get; set; }
    [ForeignKey("info")]
    public int? infoId { get; set; }
    public virtual Info info { get; set }
}

How to configure ef core, so when Client is deleted, Info is deleted automatically? Something like cascade delete.

What I have tried:

Probably should be done in

OnModelCreating

somehow, but to this point I haven't figured it out.

Posted 3-Dec-20 3:08am

csrss

Updated 3-Dec-20 3:36am

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Richard Deeming · Answer 1 · 2020-12-03T03:36:00

Cascade Delete - EF Core | Microsoft Docs[^]

Assuming this is a one-to-one relationship[^]:

C#

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Client>()
        .HasOne(c => c.info)
        .WithOne(i => i.client)
        .HasForeignKey<Client>(c => c.infoId)
        .OnDelete(DeleteBehavior.Cascade);
}

You'll need to add the reverse navigation property from Info to Client as well.

C#

public class Info
{
    public Client client { get; set; }
}