ActiveRecord includes. Specify included columns

Question

I have model Profile. Profile has_one User. User model has field email. When I call

Profile.some_scope.includes(:user)

it calls

<         


        

Answer 1

I wanted that functionality myself,so please use it. Include this method in your class

#ACCEPTS args in string format "ASSOCIATION_NAME:COLUMN_NAME-COLUMN_NAME"

def self.includes_with_select(*m)
    association_arr = []
    m.each do |part|
      parts = part.split(':')
      association = parts[0].to_sym
      select_columns = parts[1].split('-')
      association_macro = (self.reflect_on_association(association).macro)
      association_arr << association.to_sym
      class_name = self.reflect_on_association(association).class_name 
      self.send(association_macro, association, -> {select *select_columns}, class_name: "#{class_name.to_sym}")
    end
    self.includes(*association_arr)
  end

And you will be able to call like: Contract.includes_with_select('user:id-name-status', 'confirmation:confirmed-id'), and it will select those specified columns.