78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
// In MongoDB 3.4, $graphLookup was introduced. In this file, we test the behavior of graphLookup
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// when the 'connectToField' is a nested array, or when the 'connectFromField' is a nested array.
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var local = db.local;
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var foreign = db.foreign;
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local.drop();
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foreign.drop();
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// 'connectFromField' is an array of objects.
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var bulk = foreign.initializeUnorderedBulkOp();
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for (var i = 0; i < 100; i++) {
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bulk.insert({_id: i, neighbors: [{id: i + 1}, {id: i + 2}]});
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}
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assert.commandWorked(bulk.execute());
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assert.commandWorked(local.insert({starting: 0}));
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var res = local
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.aggregate({
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$graphLookup: {
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from: "foreign",
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startWith: "$starting",
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connectFromField: "neighbors.id",
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connectToField: "_id",
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as: "integers",
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},
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})
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.toArray()[0];
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assert.eq(res.integers.length, 100);
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foreign.drop();
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// 'connectToField' is an array of objects.
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bulk = foreign.initializeUnorderedBulkOp();
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for (let i = 0; i < 100; i++) {
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bulk.insert({previous: [{neighbor: i}, {neighbor: i - 1}], value: i + 1});
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}
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assert.commandWorked(bulk.execute());
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res = local
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.aggregate({
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$graphLookup: {
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from: "foreign",
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startWith: "$starting",
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connectFromField: "value",
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connectToField: "previous.neighbor",
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as: "integers",
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},
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})
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.toArray()[0];
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assert.eq(res.integers.length, 100);
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foreign.drop();
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// Both 'connectToField' and 'connectFromField' are arrays of objects.
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bulk = foreign.initializeUnorderedBulkOp();
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for (let i = 0; i < 100; i++) {
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bulk.insert({
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previous: [{neighbor: i}, {neighbor: i - 1}],
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values: [{neighbor: i + 1}, {neighbor: i + 2}],
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});
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}
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assert.commandWorked(bulk.execute());
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res = local
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.aggregate({
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$graphLookup: {
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from: "foreign",
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startWith: "$starting",
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connectFromField: "values.neighbor",
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connectToField: "previous.neighbor",
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as: "integers",
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},
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})
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.toArray()[0];
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assert.eq(res.integers.length, 100);
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