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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: 2.6.4
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Component/s: Write Ops
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Labels:None
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ALL
Not sure if this is related to https://jira.mongodb.org/browse/SERVER-14886 or not, but updates to an embedded document in an array can cause an insertion to happen in 2.6.4 but the correct update in 2.4.10.
db.test.insert({
root: [
{
_id: "A",
children: [
{_id: "C", name: "Alice"}
]
},
{
_id: "B",
children: [
{_id: "D", name: "Bob"}
]
}
]
})
To update Bob's name to Carol, I can issue:
db.test.update({"root._id": "B", "root.1.children._id": "D"}, {$set: {"root.1.children.$.name": "Carol"}})
In 2.4, this update's Bob's name to Carol. In 2.6.4, this INSERTS Carol:
mongos> db.test.find({}).pretty()
{
"_id" : ObjectId("547f72c1e52e8693ed137ad6"),
"root" : [
{
"_id" : "A",
"children" : [
{
"_id" : "C",
"name" : "Alice"
}
]
},
{
"_id" : "B",
"children" : [
{
"_id" : "D",
"name" : "Bob"
},
{
"name" : "Carol"
}
]
}
]
}
Note that if you drop the
{"root._id": "B"} part of the clause in the update, you get the 'The positional operator did not find the match needed from the query' error from SERVER-14886.
- duplicates
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- Closed
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SERVER-14662 Positional projection queries (and positional update ops) should fail with error if multiple arrays encountered
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- Closed
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- related to
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- Closed
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