[DOCS-6605] Enhanced Equality Match Meaning on $lookup Created: 16/Nov/15 Updated: 30/Oct/23 Resolved: 27/Apr/16 |
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| Status: | Closed |
| Project: | Documentation |
| Component/s: | manual |
| Affects Version/s: | None |
| Fix Version/s: | Server_Docs_20231030 |
| Type: | Improvement | Priority: | Major - P3 |
| Reporter: | Kelsey Schubert | Assignee: | Steve Renaker (Inactive) |
| Resolution: | Done | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Issue Links: |
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| Participants: | |||||||||
| Days since reply: | 7 years, 41 weeks, 6 days ago | ||||||||
| Description |
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As described in Charlie's comment, if the localField is an array matching against a field inside will behave as null. We may want to note this and recommend that users unwind first if their localFields are arrays. https://docs.mongodb.org/master/reference/operator/aggregation/lookup/#pipe._S_lookup |
| Comments |
| Comment by Githook User [ 28/Apr/16 ] |
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Author: {u'username': u'steveren', u'name': u'Steve Renaker', u'email': u'steve.renaker@mongodb.com'}Message: Signed-off-by: kay <kay.kim@10gen.com> |
| Comment by Githook User [ 28/Apr/16 ] |
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Author: {u'username': u'steveren', u'name': u'Steve Renaker', u'email': u'steve.renaker@mongodb.com'}Message: Signed-off-by: kay <kay.kim@10gen.com> |
| Comment by Githook User [ 28/Apr/16 ] |
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Author: {u'username': u'steveren', u'name': u'Steve Renaker', u'email': u'steve.renaker@mongodb.com'}Message: Signed-off-by: kay <kay.kim@10gen.com> |