How can I have ActiveRecord's pluck also return the column name for rendering in json?

Question

def jsontest
   @users = User.all.limit(10)
   render json: @users
end

yields

{
...

\"id\": 7,
\"name\": \"Sage Smith\",
\"email\"         


        

Answer 1

Fastest way to return hash of users with selected columns is use ActiveRecord::Base.connection.select_all method.

sql = User.select('id, name, email, created_at').limit(10).to_sql
@users = ActiveRecord::Base.connection.select_all(sql)
render json: @users