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  1. Core Server
  2. SERVER-14164

MongoDB: Too many positional (i.e. '$') elements found in path

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    • Type: Icon: Bug Bug
    • Resolution: Duplicate
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 2.6.0, 2.6.1
    • Component/s: Querying
    • None
    • ALL
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      Run this query:

      db.post.update(

      { 'answers.comments.name': 'jeff' }

      ,
      { '$set': {
      'answers.$.comments.$.name': 'joe'
      }},

      { multi: true }

      )

      Show
      Run this query: db.post.update( { 'answers.comments.name': 'jeff' } , { '$set': { 'answers.$.comments.$.name': 'joe' }}, { multi: true } )

      I just upgraded to Mongo 2.6.1 and one update statement that was working before is not returning an error. The update statement is:

      db.post.update( { 'answers.comments.name': 'jeff' },
    { '$set': {
        'answers.$.comments.$.name': 'joe'
    }},
    { multi: true }
)

      The error I get is:

      WriteResult({
    "nMatched" : 0,
    "nUpserted" : 0,
    "nModified" : 0,
    "writeError" : {
        "code" : 2,
        "errmsg" : "Too many positional (i.e. '$') elements found in path 'answers.$.comments.$.createUsername'"
    }
})

      When I update an element just one level deep instead of two (i.e. answers.$.name instead of answers.$.comments.$.name), it works fine. If I downgrade my mongo instance below 2.6, it also works fine.

            Assignee:
            thomas.rueckstiess@mongodb.com Thomas Rueckstiess
            Reporter:
            jeffwhelpley Jeff Whelpley
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            9 Start watching this issue

              Created:
              Updated:
              Resolved: