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Type:
New Feature
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Resolution: Duplicate
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Priority:
Minor - P4
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None
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Affects Version/s: 2.4.1
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Component/s: Querying
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None
It would be good if querying can support filtering of recent documents based on certain document fields. For example:
> db.logs.find()
{
'id': ObjectId("50ad8d451d41c8fc58000003")
'name': 'Sample Log 1',
'uploaded_at: ISODate("2013-03-14T01:00:00+01:00"),
'case_id: '50ad8d451d41c8fc58000099',
'tag_doc': {
'group_x: ['TAG-1','TAG-2'],
'group_y': ['XYZ']
}
},
{
'id': ObjectId("50ad8d451d41c8fc58000004")
'name': 'Sample Log 2',
'uploaded_at: ISODate("2013-03-15T01:00:00+01:00"),
'case_id: '50ad8d451d41c8fc58000099'
'tag_doc': {
'group_x: ['TAG-1'],
'group_y': ['XYZ']
}
}
Both documents contain the same case_id. The user can filter out all the most recently uploaded document for each unique combination of fields, for example case_id and group_y. This is helpful in aggregating on a large collection of multiple version of documents.
- duplicates
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SERVER-9366 Expose projection (aggregation) operators in regular find queries
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- Closed
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- Closed
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