Rails Model Controller Example

gistfile1.rb

class Course < ActiveRecord::Base
  def self.search(params)
    courses = []
    if params[:subject_id].present?
      subject = Subject.find(params[:subject_id])
      courses = subject.courses
    elsif params[:near].present?
      courses = Course.around_me
    elsif params[:most_popular].present?
      courses = Course.most_popular
    elsif params[:top_rated_place].present?
      courses = Course.select("COUNT(*) AS total,courses.*").order("total DESC").group(:city)
    elsif params[:type].present?
      courses = Course.with_type(params[:type])
    elsif params[:this_week].present?
      courses = Course.this_week
    elsif params[:this_month].present?
      courses = Course.this_month
    elsif params[:upcoming].present?
      courses = Course.upcoming
    else
      courses = Course.sphinx_search(params)
    end
    courses
  end  
end        


class CoursesController < ApplicationController
  def index
    @courses = Course.search(params).paginate :per_page => Course::PER_PAGE, :page => params[:page]
  end  
end