Rss feed of projects

app/controllers/projects_controller.rb

@@ -5,7 +5,7 @@ class ProjectsController < ApplicationController
   skip_before_filter :store_location, :only => [:join, :leave, :like, :dislike, :add_keyword, :delete_keyword ]
   skip_before_action :verify_authenticity_token, :only => [:add_keyword, :delete_keyword ]
   skip_load_and_authorize_resource :only => :old_archived
-  before_action :set_episode_id, :only => [:add_episode, :delete_episode]
+  before_action :load_episode
 
   # GET /projects
   def index
@@ -14,6 +14,16 @@ def index
     @new= Project.current(@episode).active.order("created_at ASC").first(5)
   end
 
+  # GET /projects/newest.rss
+
+  def newest
+    @newest = Project.current(@episode).active.includes(:episode_project_associations).
+        order('episodes_projects.created_at DESC').references(:episodes_projects).first(10)
+    respond_to do |format|
+      format.rss { render :layout => false }
+    end
+  end
+
   # GET /projects/popular
   def popular
     @projects = Project.current(@episode).liked.order("likes_count DESC")
@@ -71,7 +81,7 @@ def create
     @project.originator = current_user
 
     if @project.save
-      redirect_to project_path(@episode, @project), notice: "Project was successfully created."
+      redirect_to project_path(@episode, @project), notice: 'Project was successfully created.'
     else
       render action: "new"
     end
@@ -82,7 +92,7 @@ def update
     if @project.update_attributes(project_params)
       redirect_to project_path(@episode, @project)
     else
-      render action: "edit" 
+      render action: "edit"
     end
   end
 
@@ -139,7 +149,7 @@ def like
   # PUT /projects/1/dislike
   def dislike
     @project.dislike! current_user
-    
+
     respond_to do |format|
       format.html{ redirect_to project_path(@episode, @project), notice: "Aaww Snap! You don't love me anymore?" }
       format.js { render :partial => "like_toggle" }
@@ -168,31 +178,31 @@ def delete_keyword
 
   # PUT /projects/1/add_hackweek/1
   def add_episode
-    unless @project.episodes.include? @subject
-      @project.episodes << @subject
+    unless @project.episodes.include? @episode
+      @project.episodes << @episode
     end
 
-    redirect_to project_path(@episode, @project), notice: "Added hackweek #{@subject.name}"
+    redirect_to project_path(@episode, @project), notice: "Added hackweek #{@episode.name}"
   end
 
   # DELETE /projects/1/delete_hackweek/2
   def delete_episode
-    @project.episodes.delete(@subject)
-    redirect_to project_path(@episode, @project), notice: "Removed hackweek #{@subject.name}"
+    @project.episodes.delete(@episode)
+    redirect_to project_path(nil, @project), notice: "Removed hackweek #{@episode.name}"
   end
 
   private
 
     def project_params
       params.require(:project).permit(:description, :title, :avatar)
     end
-  
+
     def keyword_params
       params.require(:keyword)
     end
-    
-    def set_episode_id
-      @subject = Episode.find(params[:episode_id])
+
+    def load_episode
+      @episode = Episode.find(params[:episode_id]) if params[:episode_id]
     end
- 
+
 end

app/models/episode.rb

@@ -1,5 +1,8 @@
 class Episode < ActiveRecord::Base
-  has_and_belongs_to_many :projects
+
+  has_many :episode_project_associations
+  has_many :projects, through: :episode_project_associations
+
   validates :name, presence: true
 
   def self.active

app/models/episode_project_association.rb

@@ -0,0 +1,8 @@
+class EpisodeProjectAssociation < ActiveRecord::Base
+  self.table_name = 'episodes_projects'
+
+  belongs_to :episode
+  belongs_to :project
+
+  validates :episode, presence: true
+end

app/models/project.rb

@@ -19,7 +19,8 @@ class Project < ActiveRecord::Base
 
   has_many :comments, as: :commentable, dependent: :destroy
 
-  has_and_belongs_to_many :episodes
+  has_many :episode_project_associations
+  has_many :episodes, through: :episode_project_associations
 
   has_attached_file :avatar, styles: { thumb: '64x64>' }, default_url: :random_avatar
   validates_attachment_content_type :avatar, content_type: /\Aimage\/.*\Z/

app/views/projects/_tabs.html.haml

@@ -28,3 +28,10 @@
       %span.hidden-xs
         Archived
       %i.fa.fa-archive.visible-xs
+
+  %li.pull-right
+    =link_to newest_projects_path(@episode, @project, format: :rss), title: 'New projects feed' do
+      %i.fa.fa-rss
+      %span
+        RSS
+

app/views/projects/newest.rss.haml

@@ -0,0 +1,25 @@
+!!! XML
+%rss(version="2.0"
+     xmlns:content="http://purl.org/rss/1.0/modules/content/"
+     xmlns:atom="http://www.w3.org/2005/Atom")
+  %channel
+    %link #{ newest_projects_url format: :rss }
+    %atom:link(href="#{ newest_projects_url format: :rss }"
+               rel="self"
+               type="application/rss+xml")
+
+    -if @episode
+      %title Newest #{ @episode.name } projects
+      %description These are the newest projects for the #{ @episode.name }
+    -else
+      %title Newest projects (all Hackweeks)
+      %description These are the newest projects for all Hackweeks
+
+    -@newest.each do |project|
+      %item
+        %title #{ project.title }
+        %link  #{ project_url(project) }
+        %description #{ project.description }
+        %author #{ project.originator.email } (#{ project.originator.name })
+        %pubDate #{ project.created_at.rfc822 }
+        %guid(isPermaLink='true') #{ project_url(project) }

db/migrate/20150319172246_model_for_episodes_projects_association.rb

@@ -0,0 +1,15 @@
+class ModelForEpisodesProjectsAssociation < ActiveRecord::Migration
+  def change
+    add_column :episodes_projects, :id, :primary_key
+    add_column :episodes_projects, :created_at, :datetime
+
+    # We will be ordering this field to populate RSS feed
+    add_index :episodes_projects, :created_at
+
+    # To make sure every association is there only once
+    add_index :episodes_projects, [:episode_id, :project_id], unique: true
+
+    # Composite index [A, B] can be used in searches for only A, but not for only B
+    add_index :episodes_projects, :project_id
+  end
+end

db/schema.rb

@@ -11,33 +11,33 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140910105916) do
+ActiveRecord::Schema.define(version: 20150319172246) do
 
-  create_table "announcements", force: true do |t|
+  create_table "announcements", force: :cascade do |t|
     t.string   "title"
-    t.text     "text",          limit: 16777215
+    t.text     "text"
     t.integer  "originator_id"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
-  create_table "comments", force: true do |t|
+  create_table "comments", force: :cascade do |t|
     t.text     "text"
     t.integer  "commentable_id"
     t.string   "commentable_type"
     t.integer  "commenter_id"
-    t.datetime "created_at",       null: false
-    t.datetime "updated_at",       null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "enrollments", force: true do |t|
+  create_table "enrollments", force: :cascade do |t|
     t.integer  "announcement_id"
     t.integer  "user_id"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
-  create_table "episodes", force: true do |t|
+  create_table "episodes", force: :cascade do |t|
     t.string   "name"
     t.date     "start_date"
     t.date     "end_date"
@@ -46,43 +46,48 @@
     t.boolean  "active",     default: false
   end
 
-  create_table "episodes_projects", id: false, force: true do |t|
-    t.integer "episode_id"
-    t.integer "project_id"
+  create_table "episodes_projects", force: :cascade do |t|
+    t.integer  "episode_id"
+    t.integer  "project_id"
+    t.datetime "created_at"
   end
 
-  create_table "keywords", force: true do |t|
-    t.text     "name"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+  add_index "episodes_projects", ["created_at"], name: "index_episodes_projects_on_created_at"
+  add_index "episodes_projects", ["episode_id", "project_id"], name: "index_episodes_projects_on_episode_id_and_project_id", unique: true
+  add_index "episodes_projects", ["project_id"], name: "index_episodes_projects_on_project_id"
+
+  create_table "keywords", force: :cascade do |t|
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "likes", force: true do |t|
+  create_table "likes", force: :cascade do |t|
     t.integer  "project_id"
     t.integer  "user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "memberships", force: true do |t|
+  create_table "memberships", force: :cascade do |t|
     t.integer  "project_id"
     t.integer  "user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "project_interests", force: true do |t|
+  create_table "project_interests", force: :cascade do |t|
     t.integer  "project_id"
     t.integer  "keyword_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "projects", force: true do |t|
-    t.text     "title"
+  create_table "projects", force: :cascade do |t|
+    t.string   "title"
     t.text     "description"
-    t.datetime "created_at",          null: false
-    t.datetime "updated_at",          null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.integer  "originator_id"
     t.integer  "likes_count"
     t.integer  "memberships_count"
@@ -93,38 +98,38 @@
     t.datetime "avatar_updated_at"
   end
 
-  create_table "roles", force: true do |t|
+  create_table "roles", force: :cascade do |t|
     t.string   "name"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
-  create_table "roles_users", id: false, force: true do |t|
+  create_table "roles_users", id: false, force: :cascade do |t|
     t.integer "role_id"
     t.integer "user_id"
   end
 
-  create_table "updates", force: true do |t|
+  create_table "updates", force: :cascade do |t|
     t.text     "text"
     t.integer  "author_id"
     t.integer  "project_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "user_interests", force: true do |t|
+  create_table "user_interests", force: :cascade do |t|
     t.integer  "user_id"
     t.integer  "keyword_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "users", force: true do |t|
+  create_table "users", force: :cascade do |t|
     t.string   "uid"
     t.string   "name"
     t.string   "email"
-    t.datetime "created_at",                          null: false
-    t.datetime "updated_at",                          null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.string   "encrypted_password",     default: "", null: false
     t.string   "reset_password_token"
     t.datetime "reset_password_sent_at"
@@ -136,7 +141,7 @@
     t.string   "last_sign_in_ip"
   end
 
-  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
-  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
+  add_index "users", ["email"], name: "index_users_on_email", unique: true
+  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
 
 end