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// to run:
// ./mongo jstests/ref.js
db.otherthings.drop();
db.things.drop();
var other = {
s: "other thing",
n: 1
};
db.otherthings.save(other);
db.things.save({name: "abc"});
x = db.things.findOne();
x.o = new DBPointer("otherthings", other._id);
db.things.save(x);
assert(db.things.findOne().o.fetch().n == 1, "dbref broken 2");
other.n++;
db.otherthings.save(other);
assert(db.things.findOne().o.fetch().n == 2, "dbrefs broken");
db.getSiblingDB("otherdb").dropDatabase();
var objid = new ObjectId();
db.getSiblingDB("otherdb").getCollection("othercoll").insert({_id: objid, field: "value"});
var subdoc = db.getSiblingDB("otherdb").getCollection("othercoll").findOne({_id: objid});
db.mycoll.drop();
db.mycoll.insert({_id: "asdf", asdf: new DBRef("othercoll", objid, "otherdb")});
var doc = db.mycoll.findOne({_id: "asdf"}, {_id: 0, asdf: 1});
assert.eq(tojson(doc.asdf.fetch()), tojson(subdoc), "otherdb dbref");
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