061a086641
The actual change is in src/mongo/shell/collection.js with the remaining changes
to adjust tests to the new api.
The "ideal" arguments are now an array of pipeline ops and an optional object
with extra top-level options for the command (such as {explain: true}. For
backwards compatibility, we still support the varargs style where each argument
is a pipeline stage, but there is no way to specify extra parameters in this
mode.
57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
// $unwind applied to an empty array field drops the field from the source document. SERVER-6131
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t = db.jstests_aggregation_server6131;
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t.drop();
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function assertAggregationResults( expected, aggregation ) {
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assert.eq(expected, t.aggregate(aggregation).toArray());
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}
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t.drop();
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// An empty array document is dropped.
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t.save( { _id:0, a:1, b:[], c:2 } );
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assertAggregationResults( [], { $unwind:'$b' } );
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// Values from a nonempty array in another document are unwound.
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t.save( { _id:1, b:[ 4, 5 ] } );
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assertAggregationResults( [ { _id:1, b:4 },
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{ _id:1, b:5 } ],
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{ $unwind:'$b' } );
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// Another empty array document is dropped.
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t.save( { _id:2, b:[] } );
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assertAggregationResults( [ { _id:1, b:4 },
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{ _id:1, b:5 } ],
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{ $unwind:'$b' } );
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t.drop();
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// A nested empty array document is dropped.
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t.save( { _id:0, a:1, b:{ x:10, y:[], z:20 }, c:2 } );
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assertAggregationResults( [], { $unwind:'$b.y' } );
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t.drop();
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// A null value document is dropped.
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t.save( { _id:0, a:1, b:null, c:2 } );
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assertAggregationResults( [], { $unwind:'$b' } );
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t.drop();
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// A missing value causes the document to be dropped.
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t.save( { _id:0, a:1, c:2 } );
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assertAggregationResults( [], { $unwind:'$b' } );
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t.drop();
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// A missing value in an existing nested object causes the document to be dropped.
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t.save( { _id:0, a:1, b:{ d:4 }, c:2 } );
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assertAggregationResults( [], { $unwind:'$b.y' } );
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t.drop();
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// A missing value in a missing nested object causes the document to be dropped.
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t.save( { _id:0, a:1, b:10, c:2 } );
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assertAggregationResults( [], { $unwind:'$b.y' } );
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