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/**
* Tests aggregation on views for proper pipeline concatenation and semantics.
* @tags: [requires_find_command]
*/
(function() {
"use strict";
// For arrayEq, assertErrorCode, and orderedArrayEq.
load("jstests/aggregation/extras/utils.js");
let viewsDB = db.getSiblingDB("views_aggregation");
assert.commandWorked(viewsDB.dropDatabase());
// Helper functions.
let assertAggResultEq = function(collection, pipeline, expected, ordered) {
let coll = viewsDB.getCollection(collection);
let arr = coll.aggregate(pipeline).toArray();
let success = (typeof(ordered) === "undefined" || !ordered) ? arrayEq(arr, expected)
: orderedArrayEq(arr, expected);
assert(success, tojson({got: arr, expected: expected}));
};
let byPopulation = function(a, b) {
if (a.pop < b.pop)
return -1;
else if (a.pop > b.pop)
return 1;
else
return 0;
};
// Populate a collection with some test data.
let allDocuments = [];
allDocuments.push({_id: "New York", state: "NY", pop: 7});
allDocuments.push({_id: "Newark", state: "NJ", pop: 3});
allDocuments.push({_id: "Palo Alto", state: "CA", pop: 10});
allDocuments.push({_id: "San Francisco", state: "CA", pop: 4});
allDocuments.push({_id: "Trenton", state: "NJ", pop: 5});
let coll = viewsDB.coll;
let bulk = coll.initializeUnorderedBulkOp();
allDocuments.forEach(function(doc) {
bulk.insert(doc);
});
assert.writeOK(bulk.execute());
// Create views on the data.
assert.commandWorked(viewsDB.runCommand({create: "emptyPipelineView", viewOn: "coll"}));
assert.commandWorked(
viewsDB.runCommand({create: "identityView", viewOn: "coll", pipeline: [{$match: {}}]}));
assert.commandWorked(viewsDB.runCommand(
{create: "noIdView", viewOn: "coll", pipeline: [{$project: {_id: 0, state: 1, pop: 1}}]}));
assert.commandWorked(viewsDB.runCommand({
create: "popSortedView",
viewOn: "identityView",
pipeline: [{$match: {pop: {$gte: 0}}}, {$sort: {pop: 1}}]
}));
// Find all documents with empty aggregations.
assertAggResultEq("emptyPipelineView", [], allDocuments);
assertAggResultEq("identityView", [], allDocuments);
assertAggResultEq("identityView", [{$match: {}}], allDocuments);
// Filter documents on a view with $match.
assertAggResultEq(
"popSortedView", [{$match: {state: "NY"}}], [{_id: "New York", state: "NY", pop: 7}]);
// An aggregation still works on a view that strips _id.
assertAggResultEq("noIdView", [{$match: {state: "NY"}}], [{state: "NY", pop: 7}]);
// Aggregations work on views that sort.
const doOrderedSort = true;
assertAggResultEq("popSortedView", [], allDocuments.sort(byPopulation), doOrderedSort);
assertAggResultEq("popSortedView", [{$limit: 1}, {$project: {_id: 1}}], [{_id: "Palo Alto"}]);
// Test that the $out stage errors when given a view namespace.
assertErrorCode(coll, [{$out: "emptyPipelineView"}], 18631);
// Test that an aggregate on a view propagates the 'bypassDocumentValidation' option.
const validatedCollName = "collectionWithValidator";
viewsDB[validatedCollName].drop();
assert.commandWorked(
viewsDB.createCollection(validatedCollName, {validator: {illegalField: {$exists: false}}}));
viewsDB.invalidDocs.drop();
viewsDB.invalidDocsView.drop();
assert.writeOK(viewsDB.invalidDocs.insert({illegalField: "present"}));
assert.commandWorked(viewsDB.createView("invalidDocsView", "invalidDocs", []));
assert.commandWorked(
viewsDB.runCommand({
aggregate: "invalidDocsView",
pipeline: [{$out: validatedCollName}],
cursor: {},
bypassDocumentValidation: true
}),
"Expected $out insertions to succeed since 'bypassDocumentValidation' was specified");
// Test that an aggregate on a view propagates the 'allowDiskUse' option.
const extSortLimit = 100 * 1024 * 1024;
const largeStrSize = 10 * 1024 * 1024;
const largeStr = new Array(largeStrSize).join('x');
viewsDB.largeColl.drop();
for (let i = 0; i <= extSortLimit / largeStrSize; ++i) {
assert.writeOK(viewsDB.largeColl.insert({x: i, largeStr: largeStr}));
}
assertErrorCode(viewsDB.largeColl,
[{$sort: {x: -1}}],
16819,
"Expected in-memory sort to fail due to excessive memory usage");
viewsDB.largeView.drop();
assert.commandWorked(viewsDB.createView("largeView", "largeColl", []));
assertErrorCode(viewsDB.largeView,
[{$sort: {x: -1}}],
16819,
"Expected in-memory sort to fail due to excessive memory usage");
assert.commandWorked(
viewsDB.runCommand(
{aggregate: "largeView", pipeline: [{$sort: {x: -1}}], cursor: {}, allowDiskUse: true}),
"Expected aggregate to succeed since 'allowDiskUse' was specified");
// The remaining tests involve $lookup and $graphLookup. We cannot lookup into sharded
// collections, so skip these tests if running in a sharded configuration.
let isMasterResponse = assert.commandWorked(viewsDB.runCommand("isMaster"));
const isMongos = (isMasterResponse.msg === "isdbgrid");
if (isMongos) {
jsTest.log("Tests are being run on a mongos; skipping all $lookup and $graphLookup tests.");
return;
}
// Test that the $lookup stage resolves the view namespace referenced in the 'from' field.
assertAggResultEq(
coll.getName(),
[
{$match: {_id: "New York"}},
{$lookup: {from: "identityView", localField: "_id", foreignField: "_id", as: "matched"}},
{$unwind: "$matched"},
{$project: {_id: 1, matchedId: "$matched._id"}}
],
[{_id: "New York", matchedId: "New York"}]);
// Test that the $graphLookup stage resolves the view namespace referenced in the 'from' field.
assertAggResultEq(coll.getName(),
[
{$match: {_id: "New York"}},
{
$graphLookup: {
from: "identityView",
startWith: "$_id",
connectFromField: "_id",
connectToField: "_id",
as: "matched"
}
},
{$unwind: "$matched"},
{$project: {_id: 1, matchedId: "$matched._id"}}
],
[{_id: "New York", matchedId: "New York"}]);
// Test that the $lookup stage resolves the view namespace referenced in the 'from' field of
// another $lookup stage nested inside of it.
assert.commandWorked(viewsDB.runCommand({
create: "viewWithLookupInside",
viewOn: coll.getName(),
pipeline: [
{
$lookup:
{from: "identityView", localField: "_id", foreignField: "_id", as: "matched"}
},
{$unwind: "$matched"},
{$project: {_id: 1, matchedId: "$matched._id"}}
]
}));
assertAggResultEq(
coll.getName(),
[
{$match: {_id: "New York"}},
{
$lookup: {
from: "viewWithLookupInside",
localField: "_id",
foreignField: "matchedId",
as: "matched"
}
},
{$unwind: "$matched"},
{$project: {_id: 1, matchedId1: "$matched._id", matchedId2: "$matched.matchedId"}}
],
[{_id: "New York", matchedId1: "New York", matchedId2: "New York"}]);
// Test that the $graphLookup stage resolves the view namespace referenced in the 'from' field
// of a $lookup stage nested inside of it.
let graphLookupPipeline = [
{$match: {_id: "New York"}},
{
$graphLookup: {
from: "viewWithLookupInside",
startWith: "$_id",
connectFromField: "_id",
connectToField: "matchedId",
as: "matched"
}
},
{$unwind: "$matched"},
{$project: {_id: 1, matchedId1: "$matched._id", matchedId2: "$matched.matchedId"}}
];
assertAggResultEq(coll.getName(),
graphLookupPipeline,
[{_id: "New York", matchedId1: "New York", matchedId2: "New York"}]);
// Test that the $facet stage resolves the view namespace referenced in the 'from' field of a
// $lookup stage nested inside of a $graphLookup stage.
assertAggResultEq(
coll.getName(),
[{$facet: {nested: graphLookupPipeline}}],
[{nested: [{_id: "New York", matchedId1: "New York", matchedId2: "New York"}]}]);
}());
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