Question

I have a query like this:

var query = scope.Session.QueryOver<Task>().Where(s => s.Code == code && s.Flag == flag && s.Antry != null);

I have a second query:

var personQuery = scope.Session.QueryOver<Person>();

The query has a field id, which corresponds to an id in the personQuery.

What I want is to make personQuery only contain ids that are present in the query. So far, I have been doing this:

int[] arr  = query.Where(i=> i.Id!=null).List<int>().ToArray();
entryQuery.Where(i => i.Id.IsIn(arr));

But, I think this will fail because I know that:

query.Where(i=> i.Id!=null).List<int>().ToArray();

will not return an integer array but an object of query.

So how can I only get the integer’s id in the query?

Answer 1

To get only the integers id’s from the query, you can select an anonymous type with only the properties you are interested in something like:

var integerids = scope.Session.QueryOver<Person>()
    .Select(p => p.Id)
    .List<int>();