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// Tests equality query on _id with a sort, intended to be tested on both mongos and mongod. For
// SERVER-20641.
(function() {
'use strict';
var coll = db.sortl;
coll.drop();
assert.writeOK(coll.insert({_id: 1, a: 2}));
var res = coll.find({_id: 1}).sort({a: 1});
assert.eq(res.next(), {_id: 1, a: 2});
assert.eq(res.hasNext(), false);
res = coll.find({_id: 1}, {b: {$meta: "sortKey"}}).sort({a: 1});
assert.eq(res.next(), {_id: 1, a: 2, b: {"": 2}});
assert.eq(res.hasNext(), false);
res = db.runCommand({findAndModify: coll.getName(),
query: {_id: 1},
update: {$set: {b: 1}},
sort: {a: 1},
fields: {c: {$meta: "sortKey"}}});
assert.commandFailedWithCode(res, ErrorCodes.BadValue, "$meta sortKey update");
res = db.runCommand({findAndModify: coll.getName(),
query: {_id: 1},
remove: true,
sort: {b: 1},
fields: {c: {$meta: "sortKey"}}});
assert.commandFailedWithCode(res, ErrorCodes.BadValue, "$meta sortKey delete");
coll.drop();
})();
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