BulkWrite: Performing an update on the path '_id'

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    • Type: Bug
    • Resolution: Works as Designed
    • Priority: Minor - P4
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    • Affects Version/s: 1.12.0
    • Component/s: Bulk API
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      1. What would you like to communicate to the user about this feature?
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      3. Which versions of the driver/connector does this apply to?

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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?
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      In go.mod:

      go.mongodb.org/mongo-driver v1.12.0

      Example code:

      type Model struct {
    ID   uint64 `bson:"_id"`
    Data string `bson:"data"`
}

func UpdateMany(ctx context.Context, coll *mongo.Collection, models []Model) error {
    update := make([]mongo.WriteModel, 0, len(models))
    for _, model := range models {
       update = append(update,
          mongo.NewUpdateOneModel().
             SetFilter(bson.D{{"_id", model.ID}}).
             SetUpdate(bson.D{{"$set", model}}),
       )
    }
    _, err := coll.BulkWrite(ctx, update)
    return err
}

      Error when calling UpdateMany:

      bulk write exception: write errors: [Performing an update on the path '_id' would modify the immutable field '_id']

      If running the same query from mongosh there will be no error, also if ID field will have complex type (for example struct with 2 fields) - also no error

            Assignee:
            Qingyang Hu
            Reporter:
            Artem Yadelskyi
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              Created:
              Updated:
              Resolved: