Details
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Improvement
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Resolution: Won't Do
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Minor - P4
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None
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None
Description
At https://docs.mongodb.com/manual/core/index-multikey/#unique-multikey-index:
db.a.createIndex({myArray: 1}, {unique:true})
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db.a.insertOne({myArray: ['a', 'b'])
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db.a.insertOne({myArray: ['b', 'c']) // this will fail because another doc has 'b' already
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