将IQueryable应用于另一个IQueryable / DbContext

Question

I have an IQueryable<Person> which is created based on some input parameters (sort and filter).

Is possible to apply this IQueryable<T> to a DbSet<T> i have in DbContext ?

For example:

// create the query from some parameters
IQueryable<Person> query = CreateQuery(parameters);

// apply the query somehow to an existing IQueryable / DbSet
AppContext db = new AppContext();
IEnumerable<Person> result = db.People.ApplyQuery(query).ToList();

Answer 1

Actually the context must be the same. Even worst, I had a problem moving a ToList statement from inside a linq query to outside linq query, ie

// myQuery is an IQueryable from a different context
// This did not work
IEnumerable<Person> result = db.People.Where(p => myQuery.ToList().Contains(p.Id)).ToList();

// This worked
myList = myQuery.ToList();
IEnumerable<Person> result = db.People.Where(p => myList.Contains(p.Id)).ToList(); 

Really strange isn't it?