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// https://jira.mongodb.org/browse/SERVER-5369
// make sure excluding a field doesnt cause _id to appear twice
// use the aggregation test db
db = db.getSiblingDB('aggdb');
// empty and populate
db.test.drop();
db.test.save({a: 1, b: 2});
// agg with exclusion than ensure fields are only the two we expect
var f = db.test.aggregate({$project: {a: 0}});
assert.eq(["_id", "b"], Object.keySet(f.toArray()[0]), "server5369 failed");
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