How to select only specific attributes from a model?

Question

I want to select only specific attributes from a model(id,name).

The SQL-command can be for example:

SELECT id,name,username FROM Users

Do you know h

Answer 1

You can also pass in an array, like so:

Model.all.select ['id', 'title']

Answer 2

In mongoid, that would be:

User.only(:name, :username).where(id: params[:id]).first