rails-hub

require 'open-uri'
require 'csv'
class Import < ActiveRecord::Base
  attr_reader :account
  attr_reader :file

  has_one :import_file, class_name: 'Attachment::ImportFile', as: :attachable
  belongs_to :importable, polymorphic: true
  accepts_nested_attributes_for :import_file

rails-hub

class Accounts::ImportsController < Accounts::BaseController

  before_filter :load_import, only: [:show, :update, :perform]
  respond_to :html, :json
  layout false

  expose(:upload_members_form)

  def create
    import = Import.create(import_params)

rails-hub

class ToolDecorator < Draper::Decorator
  include Trials::RatingToGrade

  delegate_all

  def grade
    rating_to_grade(model.rating)
  end

  def trial_grade

rails-hub

class ToolPresenter < SimpleDelegator
  require 'rubygems'
  require 'action_view'
  include ActionView::Helpers::DateHelper

  def initialize(posts)
    @posts = posts
  end

rails-hub

A. Annotate the Code Above with an explanation of what's being done
One liner answer: 
Its finding the missions with eager loading the milestones, company etc after applying the filters depending upon what filters(search/mission type id) has been passed to it.

B. List the params being acted upon

1. mission_type_id
2. search

C. List the variables being exposed for the view and what you expect they'll contain