Entity Framework/Linq group related data - entity-framework

Question

I understand GroupBy and Include more or less, but can I group together the records that are included?
I have this working in my controller:
public async Task<IActionResult> Index()
{
return View(await _context.Organizations.Include(x => x.Members).ToListAsync());
}
Which gives me my Organizations and their Members... but I want the members grouped in to their teams. I thought something like:
public async Task<IActionResult> Index()
{
return View(await _context.Organizations.Include(
x => x.Members.GroupBy(m => m.Team)).ToListAsync());
}
But that is incorrect.
I'd like the returned data to be something around (but not necessarily exactly):
[
{
"ID" : "some-guid-string"
"Name" : "MyOrganization",
"Members" : {
"Team1" : [
"MemberName" : "John",
"MemberName" : "Jess",
"MemberName" : "Joe",
],
"Team2" : [
"MemberName" : "Jake",
"MemberName" : "Jeff"
]
}
}
]

Answer 1

I don't think you need to explicitly include fields which are coded in your query. But If I'm wrong, then you just need to replace _context.Organizations with _context.Organizations.Include(o => o.Members).Include(o => o.Members.Select(m => m.Team)) and the reset is the same.
To get a JSON output like this:
[
{
"Id": "some-guid-string",
"Name": "MyOrganization",
"Members":
{
"Team1":
[
"John",
"Jess",
"Joe"
],
"Team2":
[
"Jake",
"Jeff"
]
}
}
]
Could be done with:
_context.Organizations.Select(o => new
{
Id = o.Id,
Name = o.Name,
Members =
o.Members.GroupBy(m => m.Team)
.ToDictionary(kvp => kvp.Key.Name, kvp => kvp.Select(p => p.Name))
});