socialforge/app/api/mobile/apis/courses.rb

module Mobile
  class Courses < Grape::API
    resource :courses do
      desc "get all courses"
      params do
        requires :per_page_count, type: Integer
        requires :page, type: Integer, desc: 'current page no'
      end
      get do
        per_page_option = params[:per_page_count] || 10
        page_no = params[:page] || 1
        @courses_all = Course.active.visible.
          joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id")
        @course_count = @courses_all.count
        @course_pages = Redmine::Pagination::Paginator.new @course_count, per_page_option,page_no 
        @course_activity_count=Hash.new
        @courses_all.each do |course|
          @course_activity_count[course.id]=0
        end
        @courses = @courses_all.order("created_at desc")
        @s_type = 0
        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)
        {status: 0, data: @courses}
        # @course_activity_count=get_course_activity @courses, @course_activity_count
      end

      desc "Return a course"
      params do
        requires :id, type: Integer
      end
      route_param :id do
        get do
          course = Course.find(params[:id])
          {status: 0, data: course}
        end
      end

    end
  end
end