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//
// Verifies that mongos correctly handles empty documents when all fields are projected out
//
var options = { mongosOptions : { binVersion : "" },
shardOptions : { binVersion : "" } };
var st = new ShardingTest({ shards : 2, other : options });
var mongos = st.s0;
var coll = mongos.getCollection("foo.bar");
var admin = mongos.getDB("admin");
var shards = mongos.getDB("config").shards.find().toArray();
assert.commandWorked(admin.runCommand({ enableSharding : coll.getDB().getName() }));
printjson(admin.runCommand({ movePrimary : coll.getDB().getName(), to : shards[0]._id }));
assert.commandWorked(admin.runCommand({ shardCollection: coll.getFullName(),
key: { _id : 1 } }));
assert.commandWorked(admin.runCommand({ split : coll.getFullName(), middle : { _id : 0 } }));
assert.commandWorked(admin.runCommand({ moveChunk : coll.getFullName(),
find : { _id : 0 },
to : shards[1]._id }));
st.printShardingStatus();
// Insert 100 documents, half of which have an extra field
for (var i = -50; i < 50; i++) {
var doc = {};
if (i >= 0)
doc.positiveId = true;
assert.writeOK(coll.insert(doc));
}
//
//
// Ensure projecting out all fields still returns the same number of documents
assert.eq(100, coll.find({}).itcount());
assert.eq(100, coll.find({}).sort({ positiveId : 1 }).itcount());
assert.eq(100, coll.find({}, { _id : 0, positiveId : 0 }).itcount());
// Can't remove sort key from projection (SERVER-11877) but some documents will still be empty
assert.eq(100, coll.find({}, { _id : 0 }).sort({ positiveId : 1 }).itcount());
//
//
// Ensure projecting out all fields still returns the same ordering of documents
var assertLast50Positive = function(sortedDocs) {
assert.eq(100, sortedDocs.length);
var positiveCount = 0;
for (var i = 0; i < sortedDocs.length; ++i) {
if (sortedDocs[i].positiveId) {
positiveCount++;
}
else {
// Make sure only the last set of documents have "positiveId" set
assert.eq(positiveCount, 0);
}
}
assert.eq(positiveCount, 50);
};
assertLast50Positive(coll.find({}).sort({ positiveId : 1 }).toArray());
assertLast50Positive(coll.find({}, { _id : 0 }).sort({ positiveId : 1 }).toArray());
jsTest.log("DONE!");
st.stop();
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