Mongodb Question posted in
The official documentation can be found here.

Golang and MongoDB – I try to update toggle boolean using golang to mongodb but got object instead

I used to implement todo application using React and Nodejs. The toggle function in React and Nodejs to update Mongodb database as following code:

const toggleChecked = ({ _id, isChecked }) => {
  TasksCollection.update(_id, {
    $set: {
      isChecked: !isChecked
    }
  })
};

I would like to implement toggle function in Golang to update boolean field, but I got object instead, the following is golang code:

func updateOneMovie(movieId string) model.Netflix {
    id, _ := primitive.ObjectIDFromHex(movieId)
    filter := bson.M{"_id": id}
    update := bson.M{"$set": bson.M{"watched": bson.M{"$not": "$watched"}}}
    var updateResult model.Netflix

    result, err := collection.UpdateOne(context.Background(), filter, update)

    err = collection.FindOne(context.Background(), filter).Decode(&updateResult)

    if err != nil {
        log.Fatal(err)
    }

    fmt.Println(result)
    return updateResult
}

The result in Mongodb updates as the object instead of boolean. How can I fix to make it update toggle boolean?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I found the solution, I use Pipeline with bson.D as the following code:

    func updateOneMovie(movieId string) model.Netflix {
    id, _ := primitive.ObjectIDFromHex(movieId)
    filter := bson.M{"_id": id}
    update := bson.D{{Key: "$set", Value: bson.D{{Key: "watched", Value: bson.D{{Key: "$not", Value: "$watched"}}}}}}
    var updateResult model.Netflix

    result, err := collection.UpdateOne(context.Background(), filter, mongo.Pipeline{update})

    err = collection.FindOne(context.Background(), filter).Decode(&updateResult)

    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("Modified Count: ", result.ModifiedCount)
    return updateResult
}

    The result, I can update boolean correctly.


  2. 0

    Passing a single document (e.g. bson.M or bson.D) as the update document, field names and values will be interpreted as-is (literally).

    To use aggregation pipelines with updates, you must pass an array as the update document. This is the only requirement. The array may be mongo.Pipeline, bson.A, []bson.D, []bson.M or even []any, it doesn’t matter, it just must be an array or slice in Go. The elements may be bson.M, bson.D or any other values representing a document.

    So the simplest solution:

    filter := bson.M{"_id": id}
update := []any{
    bson.M{"$set": bson.M{"watched": bson.M{"$not": "$watched"}}}
}
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search