I have a class called Identity with two properties: Type and Number. The Type property is an enum with the [BsonRepresentation(BsonType.String)] attribute set, so it's stored as strings instead of integers.
I now have a aggregation ending in a projection. In that projection, I have a $filter on an array of identities. That filter fails, and from what I can see, it fails because it tries to compare the stored string values to integer values.
I'll try to give an representation of my data and types:
Stored documents
class Customer
[BsonRepresentation(BsonType.ObjectId)]
string Id;
User[] Users;
Items[] Items;
end;
class User
Identity Identity;
end;
class Identity
[BsonRepresentation(BsonType.String)]
IdentityType IdentityType;
string IdentityNumber;
end;
class Item
[BsonRepresentation(BsonType.ObjectId)]
string Id;
end;
My aggregation
_collection.Aggregate()
.Match(Builders<Customer>.Filter.In("Items.Id", ["id1", "id2"]))
.Unwind<UnwindedCustomer>("Items")
.Match(Builders<UnwindedCustomer>.Filter.In("Items.Id", ["id1", "id2"]))
.Project(doc => new
{
Id = doc.Items.Id,
CustomerId = doc.Id,
UserIsCustomer = doc.Users.Where(user =>
user.Identity.IdentityNumber == "123" &&
user.Identity.IdentityType == IdentityType.SomeType)
});
So I'm looking for some specific items, and for those items, I want to know which customer they belongs to, and if the given user is a listed user of that customer.
If I render the last stage of the projection, I get something like
{ "$project" :
{
"Id" : "$Items.Id",
"CustomerId" : "$_id",
"UserIsCustomer" :
{ "$filter" :
{
"input" : "$Users",
"as" : "user",
"cond" : { "$and" : [
{ "$eq" : ["$$user.Identity.IdentityNumber", "123"] },
{ "$eq" : ["$$user.Identity.IdentityType", 1] }
] }
} },
"_id" : 0
}
}
Why isn't the IdentityType rendered as a string?
