Question

I have two Models, Programme and Event, a programme has many events. I need to find the programmes which have an event with a specfic date.

      @programmes = Programme.joins(:events).where(:events => {:date => params[:date]}).uniq

This works correctly. But when using

programme.events

it of course gets all events associated with a programme, how can I get just the events that match the criteria in original statement

Answer 1

The easiest way is to create a method on programme

class Programme < ActiveRecord::Base
  def events_for_date(date)
    events.where(:date => date).uniq
  end
end

You would then call this:

@programme.events_for_date(params[:date])

You could also add a scope to the Event class, but this is likely easier to understand.