[SERVER-36999] mongo shell doesn't support inserting documents with duplicate field names Created: 05/Sep/18 Updated: 27/Oct/23 Resolved: 05/Sep/18 |
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| Status: | Closed |
| Project: | Core Server |
| Component/s: | Tools |
| Affects Version/s: | 3.6.7, 4.0.0 |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major - P3 |
| Reporter: | Adam Milazzo | Assignee: | Nick Brewer |
| Resolution: | Works as Designed | Votes: | 0 |
| Labels: | None | ||
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Environment: |
Windows |
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| Issue Links: |
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| Operating System: | ALL | ||||||||
| Participants: | |||||||||
| Description |
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Example shell output: > db.dup.insert({_id:1, a:1, a:2}) InsertMany has the same problem: > db.dup.insertMany([\{_id:1, a:1, a:2},\{_id:2,a:1,a:2}]) { "acknowledged" : true, "insertedIds" : [ 1, 2 ] }> db.dup.find() { "_id" : 1, "a" : 2 } { "_id" : 2, "a" : 2 } |
| Comments |
| Comment by Nick Brewer [ 05/Sep/18 ] |
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admilazz Thanks for your report. This is expected behavior and is a result of how Javascript handles duplicate property names. As the documentation notes, handling of duplicate fields differs depending upon the driver used. The underlying behavior of duplicate fields being allowed is tracked here: SERVER-6439 -Nick |