Can EF automatically delete data that is orphaned, where the parent is not deleted?

Question

For an application using Code First EF 5 beta I have:

public class ParentObject
{
    public int Id {get; set;}
    public virtual List Ch         


        

Answer 1

Want to share another .net ef core solution that worked for me, may be somebody will find it usefull.

I had a child table with two foreign keys (either or), so the accepted solution didn't work for me. Based on the answer by Marcos Dimitrio I came up with the following:

In my custom DbContext:

public override async Task SaveChangesAsync(CancellationToken cancellationToken = new CancellationToken())
  {
    var modifiedEntities = this.ChangeTracker.Entries().Where(c => c.State == EntityState.Modified);
    foreach (var entityEntry in modifiedEntities)
    {
      if (entityEntry.Entity is ChildObject)
      {
         var fkProperty = entityEntry.Property(nameof(ChildObject.ParentObjectId));
         if (fkProperty.IsModified && fkProperty.CurrentValue == null && fkProperty.OriginalValue != null)
         {
           // Checked if FK was set to NULL
           entityEntry.State = EntityState.Deleted;
         }
      }
    }

    return await base.SaveChangesAsync(cancellationToken);
  }