partial update using mgo

Question

I have the following problem. I need to convert a structure to map[string]interface{} in order to perform an update in database (using mgo as driver fo

Answer 1

The solution can be:
1. client json -> struct -> xml -> map -> database
2. Update partital with $set operator:

collection.Update(bson.M{"_id": id}, bson.M{"$set": bson.M{"name": "new Name"}})

Read more: http://docs.mongodb.org/manual/reference/operator/update/set/
3. Load the document that is going to be updated and store it in a tmp variable. Parse the user input to another variable. Overwrite the values you need to preserve before updating.

Answer 2

If you are using go.mongodb.org/mongo-driver, you will have to use UpdateOnemethod to update the specific fields. Here is the code

    database := db.Conn.Database("myDatabase")
    coll := database.Collection("myCollection")
    
    filter := bson.M{"_id": bson.M{"$eq": objectHexID}}
    update := bson.M{"$set": bson.M{"useremail": "abc@email.com"}}

    updated, err := coll.UpdateOne(ctx, filter, update)