Merit Gem: expiring points

Question

I'm giving discounts on products based on user's point total. But I would like to encourage users to use those points within 180 days. So, only points created_at < 180.days.ago would count.

What would be a simple way to get the only punctuation from 180 days ago?

does the act of awarding points generate an instance of something recording how many points were added and when in your database? — sicks, Jun 14 '14 at 16:56
I'm using this gem: https://github.com/tute/merit . I think it does. — alexandrecosta, Jun 14 '14 at 17:17

score 1 · Accepted Answer · answered Nov 16 '14 at 14:58

It seems too late but now I'm working on similar situation and I find this example in their own documents.

https://github.com/tute/merit#other-actions-1

In your case code would be something like this.

user.score_points.where("created_at > '#{180.days.ago}'").sum(:num_points)

Apparently, #points returns mere integer (not a Point object). So if you wanted to pick and choose points with their given date, you need to use #score_points instead.

I hope this helps.

score 0 · Answer 2 · answered Jun 14 '14 at 17:28

I'm not familiar with Merit, so you'll have to look at what models it gives you, but you can probably do something like this in your user model:

class User < ActiveModel::Base
  def validPonts
    self.points.select{ |p| p.created_at > 180.days.ago } 
  end
end

and then you call @user.validPoints to retrieve only the points that exist from the last 180 days.

Merit Gem: expiring points

2 Answers2