Question

How can I select documents based on values within the embedded documents? For instance, I have class r that has a list of i classes. I want to select all r’s that have i.name==”foo”.

Answer 1

If you want to select all r‘s that have at least one i with i.Name == "foo" you can use this query:

var result = collectionOfRs.Where(r => r.ListOfIs.Any(i => i.Name == "foo"));

If you want to select all r‘s that have all i‘s with i.Name == "foo" you can use this one:

var result = collectionOfRs.Where(r => r.ListOfIs.All(i => i.Name == "foo"));