Details
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Type:
Improvement
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Status: Open
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Priority:
Major - P3
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Resolution: Unresolved
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Affects Version/s: 4.0.6
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Fix Version/s: Backlog
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Component/s: None
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Labels:None
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Backport Requested:v4.0, v3.6
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Sprint:Query 2019-04-22
Description
With MongoDB 3.6, dollar-prefixed fields were allowed. Invoking ReplaceOne on such a document, however, results in an error:
rs0:PRIMARY> db.coll.insertOne({"a": {"$foo": 1}})
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{
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"acknowledged" : true,
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"insertedId" : ObjectId("5c86835900b48b0b86ee197d")
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}
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rs0:PRIMARY> doc = db.coll.findOne()
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{ "_id" : ObjectId("5c86835900b48b0b86ee197d"), "a" : { "$foo" : 1 } }
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rs0:PRIMARY> doc
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{ "_id" : ObjectId("5c86835900b48b0b86ee197d"), "a" : { "$foo" : 1 } }
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rs0:PRIMARY> doc['b'] = 2
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2
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rs0:PRIMARY> db.coll.replaceOne({}, doc)
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2019-03-11T11:49:14.749-0400 E QUERY [js] WriteError: The dollar ($) prefixed field '$foo' in 'a.$foo' is not valid for storage. :
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WriteError({
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"index" : 0,
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"code" : 52,
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"errmsg" : "The dollar ($) prefixed field '$foo' in 'a.$foo' is not valid for storage.",
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"op" : {
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"q" : { },
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"u" : {
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"_id" : ObjectId("5c86835900b48b0b86ee197d"),
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"a" : {
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"$foo" : 1
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},
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"b" : 2
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},
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"multi" : false,
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"upsert" : false
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}
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})
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WriteError@src/mongo/shell/bulk_api.js:461:48
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Bulk/mergeBatchResults@src/mongo/shell/bulk_api.js:841:49
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Bulk/executeBatch@src/mongo/shell/bulk_api.js:906:13
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Bulk/this.execute@src/mongo/shell/bulk_api.js:1150:21
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DBCollection.prototype.replaceOne@src/mongo/shell/crud_api.js:489:17
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@(shell):1:1
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This happened on MongoDB 4.0.5, but probably happens on all versions. This smells of a validation that should have been removed in 3.6 when these field names were allowed.
I can't think of any reason that documents valid for insertOne wouldn't be valid for replaceOne.
Attachments
Issue Links
- is duplicated by
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SERVER-56462 Field starting with dollar in an embedded document cannot be updated with $set
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- Closed
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