How can I add an attribute to User model?

[Alienazk]

I am trying to modify a plugin.
The following code failed and threw an error like:

#  total_points is a sum table with column "total_earned_points".
module MyModel::UserExtension
  def self.prepended(base)
    base.has_many :user_points, class_name: 'MyModel::UserPoint'
    base.has_one :total_point, class_name: 'MyModel::TotalPoint'
  end
end

 reloadable_patch do |plugin|
    User.class_eval { prepend MyModel::UserExtension }
  end

 add_to_class(:user, :total_earned_points) do
    # self.user_points.sum(:reward_points)
    self.total_point[:total_earned_points]
  end

I am very new to rails. Could you please tell me what is wrong with it?
Thanks so much!

[pfaffman (Jay Pfaffman)]

Sorry this might not be much help, but it’s fast.

Something that you expect to be an array is nil. Mabye args is nil and needs to be a []?

You can also take a look at GitHub - discourse/all-the-plugins to try to find examples of what you’re trying to do (I can’t quite tell what you’re trying to do).

Check out discourse-calendar. It adds an Event class, which seems pretty analogous to what you’re trying to do.

There are a bunch of plugins taht have a similar reloadable_patch block, though.

[Alienazk]

Thank you for reply!
I just create a new table and want to add one of the columns of the table to user table.

[Alienazk]

I change

add_to_class(:user, :total_earned_points) do
    # self.user_points.sum(:reward_points)
    self.total_point[:total_earned_points]
end

to

add_to_class(:user, :total_earned_points) do
    # self.user_points.sum(:reward_points)
    self.total_point.read_attribute(:total_earned_points)
end

still doesn’t work.
Can anyone help me?