Trying to update a struct

update struct

type User struct {
	mogo.DocumentModel `bson:",inline" coll:"users"`
	Username           string        `json:"username" binding:"required"`
	Email              string        `idx:"{email},unique" json:"email" binding:"required"`
	Password           string        `json:"password" binding:"required"`
	FirstName          string        `json:"firstname"`
	LastName           string        `json:"lastname"`
	// CreatedAt          *time.Time
	// UpdatedAt          *time.Time
	Verified *time.Time `json:"_verified"`
}

func init() {
	mogo.ModelRegistry.Register(User{})
}

// Activate service removes one user
func (userservice Userservice) Update(user *entity.User, data map[string]interface{}) (*entity.User, error) {
	conn := db.GetConnection()
	defer conn.Session.Close()

	doc := mogo.NewDoc(user).(*(entity.User))
	for k, v := range data {
		fmt.Printf("%s is also %s", k, v)
		// (doc)[k] = v
	}
	
	/*
		the way mogo updates is
		doc.Username = x
		doc.Email = Y
		
		but i want to be able to pass in an interface with key and value, so

		doc.key = value
	*/

	err := mogo.Save(doc)
	if vErr, ok := err.(*mogo.ValidationError); ok {
		return nil, vErr
	}
	err = mogo.Save(doc)
	return doc, nil
}

First, why though? Why do you want to pass in an interface map? Why not just fill in the struct values?

i want to be able to fill the values dynamically. like in a normal uodate

how would you run an update for this?

You should have the concrete values themselves (what is the password, firstName, lastName, etc. value itself?). If you have it simply pass it into the function and create a document with the ID of the existing document but with updated values. I don't know how to use mogo but it should probably look like below.

(But also, I have to say... I strongly suggest you just use the Mongo default library (or globalsign/mgo, at least). I really don't think you need all these wrappers, and they aren't well documented or maintained. E.g. I tried to find how to set the document ID in mogo's docs but couldn't find anything.)

func (userservice Userservice) Update(user *entity.User, password, firstName, lastName string) (*entity.User, error) {
	doc := mogo.NewDoc(user).(*(entity.User))
        // set the ID somehow
        // doc.ID = id
        doc.password = password
        doc.firstName = firstName

	err := mogo.Save(doc)
        // ...
}

yeah, the reason i picked mogo is, it's the only one that allows for a mongoose like schema with document ref (like mngoose)
or do you know another?
also what i didnt want with this
doc.password = password
doc.firstName = firstName
is that i have to pass all the elements in the struct every time

Nah, I don't know another library for doing that.

Yeah, in the main libraries, you can pass in a map into the update function (see: https://www.mongodb.com/blog/post/quick-start-golang--mongodb--how-to-update-documents; bson.M is an alias for map[string]interface]), but even then I wouldn't recommend, except you really need to.

If you use the actual value and the same struct you use for insertion, you retain more control about what's going in and coming out of the DB.

It's actually possible that mogo's Update function also allows you to pass in a map[string]interface, but I can't tell from the docs.

yeah the docs is horrible. i was actually thinking of creating my own wrapper around it.
but abeg, i don tire