Question

What is the elegant way of the soft delete on EntityFramework? I have already identified a property (database field) as deleted and always use this filter on linq statements.

Like

Foo Class  
  int NumberField  
  string Description 
  bool Deleted

contexts.Foos.Where(x=> !x.Deleted);

It is not feasible on complex queries.

I just looked these solutions..
Link 1, Link 2

Any help appreciated..

Answer 1

Yes this possible with EF via pattern.
If you use a Fascade/repository pattern and access EVERY time via that fascade.

eg
an implementation of an interface on ALL repository classes might look like this:

 class MyRepositoryBase<T>....

    public IQueryable<T> ValidQuerySet  // this is not deleted check  Set

    {  get {  return Context.Set<T>().Where(t => t.deleted != true);
           }
    }

You would access exactly as if it was the original DbSet.
EF will combine the conditions.

var myQuerySet = MyRespository<T>.ValidQuerySet.Where(t=>t.foo == "bar");