MongoDB count: BSON value is type 'int_', expected to be one of [double_]

[callumenator]

This throws an exception for me on Windows 7 64bit, using mongo version 3.0.1 64bit, Vibe 0.7.23:

import std.stdio;
import vibe.d;

MongoClient client;

void test()
{
    auto coll = client.getCollection("test.collection");
    auto n = coll.count(["_id": Bson(0)]);
    writeln(n);
}

shared static this()
{
    client = connectMongoDB("127.0.0.1");
    test();
}

object.Exception@C:\Users\cal\AppData\Roaming\dub\packages\vibe-d-0.7.23\source\vibe\data\bson.d(611): BSON value is type 'int_', expected to be one of [double_]

What is the right fix for this? Presumably this works for most people.

[MartinNowak]

What throws, writeln? What makes you think it only fails for you?

[s-ludwig]

They changed some field types from double to int for MongoDB 3.x. Probably the best idea would be to generally implement implicit conversions for handling all MongoDB replies similar to what JavaScript would do.