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/**
* This is the test for $documents stage in aggregation pipeline on a sharded collection.
* @tags: [ do_not_wrap_aggregations_in_facets, requires_fcv_51 ]
*
*/
(function() {
"use strict";
load("jstests/aggregation/extras/utils.js"); // For resultsEq.
let st = new ShardingTest({shards: 2});
const db = st.s.getDB(jsTestName());
const dbName = db.getName();
assert.commandWorked(db.adminCommand({enableSharding: dbName}));
// Create sharded collections.
const coll = db['shardedColl'];
st.shardColl(coll, {x: 1}, {x: 1}, {x: 1}, dbName);
const lookup_coll = db['lookupColl'];
st.shardColl(lookup_coll, {id_name: 1}, {id_name: 1}, {id_name: 1}, dbName);
for (let i = 0; i < 10; i++) {
assert.commandWorked(lookup_coll.insert({id_name: i, name: "name_" + i}));
}
// $documents given an array of objects.
const docs = db.aggregate([{$documents: [{a1: 1}, {a1: 2}]}]).toArray();
assert.eq(2, docs.length);
assert.eq(docs[0], {a1: 1});
assert.eq(docs[1], {a1: 2});
// $documents evaluates to an array of objects.
const docs1 =
db.aggregate([{$documents: {$map: {input: {$range: [0, 100]}, in : {x: "$$this"}}}}]).toArray();
assert.eq(100, docs1.length);
for (let i = 0; i < 100; i++) {
assert.eq(docs1[i], {x: i});
}
// $documents evaluates to an array of objects.
const docsUnionWith =
coll.aggregate([
{
$unionWith: {
pipeline: [{$documents: {$map: {input: {$range: [0, 5]}, in : {x: "$$this"}}}}]
}
},
{$group: {_id: "$x", x: {$first: "$x"}}},
{$project: {_id: 0}},
])
.toArray();
assert(resultsEq([{x: 0}, {x: 1}, {x: 2}, {x: 3}, {x: 4}], docsUnionWith));
{ // $documents with const objects inside $unionWith.
const res = coll.aggregate([
{$unionWith: {pipeline: [{$documents: [{x: 1}, {x: 2}]}]}},
{$group: {_id: "$x", x: {$first: "$x"}}},
{$project: {_id: 0}}
])
.toArray();
assert(resultsEq([{x: 1}, {x: 2}], res));
}
{ // $documents with const objects inside $lookup (no "coll", explicit $match).
const res = lookup_coll.aggregate([
{
$lookup: {
let: {"id_lookup": "$id_name"},
pipeline: [
{$documents: [{xx: 1}, {xx: 2}, {xx : 3}]},
{
$match:
{
$expr:
{
$eq:
["$$id_lookup", "$xx"]
}
}
}
],
as: "names"
}
},
{$match: {"names": {"$ne": []}}},
{$project: {_id: 0}}
]
)
.toArray();
assert(resultsEq(
[
{id_name: 1, name: "name_1", names: [{"xx": 1}]},
{id_name: 2, name: "name_2", names: [{"xx": 2}]},
{id_name: 3, name: "name_3", names: [{"xx": 3}]}
],
res));
}
{ // $documents with const objects inside $lookup (no "coll", + localField/foreignField).
const res = lookup_coll.aggregate([
{
$lookup: {
localField: "id_name",
foreignField: "xx",
pipeline: [
{$documents: [{xx: 1}, {xx: 2}, {xx: 3}]}
],
as: "names"
}
},
{$match: {"names": {"$ne": []}}},
{$project: {_id: 0}}
])
.toArray();
assert(resultsEq(
[
{id_name: 1, name: "name_1", names: [{"xx": 1}]},
{id_name: 2, name: "name_2", names: [{"xx": 2}]},
{id_name: 3, name: "name_3", names: [{"xx": 3}]}
],
res));
}
// Must fail when $document appears in the top level collection pipeline.
assert.throwsWithCode(() => {
coll.aggregate([{$documents: {$map: {input: {$range: [0, 100]}, in : {x: "$$this"}}}}]);
}, ErrorCodes.InvalidNamespace);
// Must fail due to misplaced $document.
assert.throwsWithCode(() => {
coll.aggregate([{$project: {x: [{xx: 1}, {xx: 2}]}}, {$documents: [{x: 1}]}]);
}, 40602);
// Test that $documents fails due to producing array of non-objects.
assert.throwsWithCode(() => {
db.aggregate([{$documents: [1, 2, 3]}]);
}, 40228);
// Now with one object and one scalar.
assert.throwsWithCode(() => {
db.aggregate([{$documents: [{x: 1}, 2]}]);
}, 40228);
// Test that $documents fails due when provided a non-array.
assert.throwsWithCode(() => {
db.aggregate([{$documents: "string"}]);
}, 5858203);
// Test that $documents succeeds when given a singleton object.
assert.eq(db.aggregate([{$documents: [{x: [1, 2, 3]}]}]).toArray(), [{x: [1, 2, 3]}]);
// Must fail when $document appears in the top level collection pipeline.
assert.throwsWithCode(() => {
coll.aggregate([{$documents: {$map: {input: {$range: [0, 100]}, in : {x: "$$this"}}}}]);
}, ErrorCodes.InvalidNamespace);
st.stop();
})();
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