Active Record .push() problem

Hello,

I have code like this

  def items
    my_items = self.items
    if self.added_items
      self.added_items.each do |ai|
        my_items.push(as.item)
      end
    end
    return my_items

  end

the added items are a join table when you connect to other users
items. Then im trying to display the complied list. but when doing
this, it changes the user_id of the added item from the user that
created to the current_user.

not fully understanding why, or if there is a better way to handle
this.

any help would be greatly appreciated.