ec18db9868
The main difference between this version and the old is that the following
three $pipelines will produce the same output (SERVER-6468):
{'a.b': 1} // classic inclusion
{a: {b: 1} // nested inclusion
{'a.b': '$a.b'} // dotted FieldPathExpression
{a: {b: '$a.b'} // nested FieldPathExpression
Additionally support for exclusion of fields other than _id has been
removed for 2.2 (SERVER-6361)
Other related bugs:
SERVER-6177 better error for {a:1, 'a.b':1}
SERVER-6181 support for computed _id
SERVER-6184 support {'a.b': 1, a:{c:1}} in either order
Remaining TODOs:
Re-enable the isSimple() method
See if this can be used more directly by $group to support nested fields (SERVER-6198)
Disabled test for SERVER-5369 because it depends on ability to exclude
arbitrary fields.
17 lines
415 B
JavaScript
17 lines
415 B
JavaScript
// SERVER-6468 nested and dotted projections should be treated the same
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c = db.c;
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c.drop();
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c.save( { a:'foo', b:{ c:'bar', z:'not there' } } );
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function test(projection) {
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res = c.aggregate({$project: projection})
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assert.eq(res.result[0], {b: {c: 'bar'}});
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}
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// These should all mean the same thing
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test({_id:0, 'b.c':1})
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test({_id:0, 'b.c':'$b.c'})
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test({_id:0, b: {c:1}})
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test({_id:0, b: {c:'$b.c'}})
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