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Type:
Bug
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Resolution: Duplicate
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Priority:
Trivial - P5
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None
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Affects Version/s: 3.0.4
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Component/s: Querying
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None
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ALL
I'm not sure why an array is accepted as an $orderby value, since it appears to have no effect on the query. I thought that there might have been some lax checking around the array/document field types and MongoDB would simply use the key/value pairs regardless (e.g. [1] would be equivalent to {"0":1}), but that wasn't the case. Additionally, I checked if an array of field names would be accepted, with an implied ascending order.
> db.foo.drop()
true
> db.foo.insert([{0:5},{0:4},{0:3}])
BulkWriteResult(...)
> db.foo.find({$query:{},$orderby:[-1]})
{ "_id" : ObjectId("559ad6b5251b88948583bb1c"), "0" : 5 }
{ "_id" : ObjectId("559ad6b7251b88948583bb1d"), "0" : 4 }
{ "_id" : ObjectId("559ad6b8251b88948583bb1e"), "0" : 3 }
> db.foo.find({$query:{},$orderby:[1]})
{ "_id" : ObjectId("559ad6b5251b88948583bb1c"), "0" : 5 }
{ "_id" : ObjectId("559ad6b7251b88948583bb1d"), "0" : 4 }
{ "_id" : ObjectId("559ad6b8251b88948583bb1e"), "0" : 3 }
> db.foo.find({$query:{},$orderby:["0"]})
{ "_id" : ObjectId("559ad6b5251b88948583bb1c"), "0" : 5 }
{ "_id" : ObjectId("559ad6b7251b88948583bb1d"), "0" : 4 }
{ "_id" : ObjectId("559ad6b8251b88948583bb1e"), "0" : 3 }
> db.foo.find({$query:{},$orderby:{0:-1}})
{ "_id" : ObjectId("559ad6b5251b88948583bb1c"), "0" : 5 }
{ "_id" : ObjectId("559ad6b7251b88948583bb1d"), "0" : 4 }
{ "_id" : ObjectId("559ad6b8251b88948583bb1e"), "0" : 3 }
> db.foo.find({$query:{},$orderby:{0:1}})
{ "_id" : ObjectId("559ad6b8251b88948583bb1e"), "0" : 3 }
{ "_id" : ObjectId("559ad6b7251b88948583bb1d"), "0" : 4 }
{ "_id" : ObjectId("559ad6b5251b88948583bb1c"), "0" : 5 }
> db.foo.find({$query:{},$orderby:5})
Error: error: {
"$err" : "Can't canonicalize query: BadValue sort must be object or array",
"code" : 17287
}
This may end up being redundant in light of SERVER-15176, especially if we'd rather not make the $orderby validation stricter in a 3.0.x patch release.
- duplicates
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SERVER-18905 Server should reject array values for sort specification
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- Closed
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