BSON encoding, passing single string to $addToSet field

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    • Type: Bug
    • Resolution: Works as Designed
    • Priority: Major - P3
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    • Affects Version/s: 1.4.4
    • Component/s: BSON
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    • Environment:
      Linux 4.14
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      This fails:

       

      update := bson.D{

                                 {"$set", f},

                                 {"$addToSet", bson.E{"outsideIp", "string"}},

}

 

updateResult, err := collection.UpdateOne(context.TODO(), filter, update)

       

      This works:

       

      update := bson.D{

                                 {"$set", f},

}

 

updateResult, err := collection.UpdateOne(context.TODO(), filter, update)

       

       

      Here is the error message:

       

      multiple write errors: [\{write errors: [{Cannot apply $addToSet to non-array field. Field named 'key' has non-array type string}]}, \{<nil>}]

       

      I only want to use $addToSet with a single string, as documented in the mongodb docs:

       

      db.inventory.update( { _id: 1 }, { $addToSet: { tags: "accessories" } } )

       

      What's going on here?

        1. godriver1818_test.go
          0.6 kB

            Assignee:
            Kevin Albertson
            Reporter:
            Andrew Hodel
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              Created:
              Updated:
              Resolved: