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Type:
Bug
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Resolution: Duplicate
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Priority:
Major - P3
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None
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Affects Version/s: 3.0.0, 3.0.1
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Component/s: Index Maintenance
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None
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ALL
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- Open MongoDB Shell
- Switch to database `mydb`
- Insert `{x: 1}` into collection `testData`
- Create index on key `x` of collection `testData`, specifying option `{unique: true, dropDups: true}`
When attempting to create a unique index on a key with duplicates (i.e. using the `dropDups: true` option), the index creation fails with a duplicate key error.
MongoDB shell version: 3.0.1
connecting to: test
> use mydb
switched to db mydb
> db.testData.insert({x: 1})
WriteResult({ "nInserted" : 1 })
> db.testData.insert({x: 1})
WriteResult({ "nInserted" : 1 })
> db.testData.createIndex({x: 1}, {unique: true, dropDups: true})
{
"createdCollectionAutomatically" : false,
"numIndexesBefore" : 1,
"errmsg" : "exception: E11000 duplicate key error index: mydb.testData.$x_1 dup key: { : 1.0 }",
"code" : 11000,
"ok" : 0
}
- duplicates
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- Closed
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