Add followers and feed

Author: apai4

app/controllers/articles_controller.rb

@@ -13,6 +13,16 @@ def index
     @articles = @articles.order(created_at: :desc).offset(params[:offset] || 0).limit(params[:limit] || 20)
   end
 
+  def feed
+    @articles = Article.includes(:user).where(user: current_user.following_users)
+
+    @articles_count = @articles.count
+
+    @articles = @articles.order(created_at: :desc).offset(params[:offset] || 0).limit(params[:limit] || 20)
+
+    render :index
+  end
+
   def create
     @article = Article.new(article_params)
     @article.user = current_user

app/controllers/follows_controller.rb

@@ -0,0 +1,19 @@
+class FollowsController < ApplicationController
+  before_action :authenticate_user!
+
+  def create
+    @user = User.find_by_username!(params[:profile_username])
+
+    current_user.follow(@user) if current_user.id != @user.id
+
+    render 'profiles/show'
+  end
+
+  def destroy
+    @user = User.find_by_username!(params[:profile_username])
+
+    current_user.stop_following(@user) if current_user.id != @user.id
+
+    render 'profiles/show'
+  end
+end

app/models/follow.rb

@@ -0,0 +1,14 @@
+class Follow < ActiveRecord::Base
+
+  extend ActsAsFollower::FollowerLib
+  extend ActsAsFollower::FollowScopes
+
+  # NOTE: Follows belong to the "followable" interface, and also to followers
+  belongs_to :followable, :polymorphic => true
+  belongs_to :follower,   :polymorphic => true
+
+  def block!
+    self.update_attribute(:blocked, true)
+  end
+
+end

app/models/user.rb

@@ -8,6 +8,10 @@ class User < ActiveRecord::Base
   has_many :favorites, dependent: :destroy
   has_many :comments, dependent: :destroy
 
+  acts_as_follower
+  acts_as_followable
+
+
   validates :username, uniqueness: { case_sensitive: true },
                        format: { with: /\A[a-zA-Z0-9]+\z/ },
                        presence: true,

app/views/profiles/_profile.json.jbuilder

@@ -1,2 +1,3 @@
 json.(user, :username, :bio)
 json.image user.image || 'https://static.productionready.io/images/smiley-cyrus.jpg'
+json.following signed_in? ? current_user.following?(user) : false

config/routes.rb

@@ -6,11 +6,14 @@
 
     resource :user, only: [:show, :update]
 
-    resources :profiles, param: :username, only: [:show]
+    resources :profiles, param: :username, only: [:show] do
+      resource :follow, only: [:create, :destroy]
+    end
 
     resources :articles, param: :slug, except: [:edit, :new] do
       resource :favorite, only: [:create, :destroy]
       resources :comments, only: [:create, :index, :destroy]
+      get :feed, on: :collection
     end
 
     resources :tags, only: [:index]

db/migrate/20160712061614_acts_as_follower_migration.rb

@@ -0,0 +1,17 @@
+class ActsAsFollowerMigration < ActiveRecord::Migration
+  def self.up
+    create_table :follows, :force => true do |t|
+      t.references :followable, :polymorphic => true, :null => false
+      t.references :follower,   :polymorphic => true, :null => false
+      t.boolean :blocked, :default => false, :null => false
+      t.timestamps
+    end
+
+    add_index :follows, ["follower_id", "follower_type"],     :name => "fk_follows"
+    add_index :follows, ["followable_id", "followable_type"], :name => "fk_followables"
+  end
+
+  def self.down
+    drop_table :follows
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160712061113) do
+ActiveRecord::Schema.define(version: 20160712061614) do
 
   create_table "articles", force: :cascade do |t|
     t.string   "title"
@@ -48,6 +48,19 @@
   add_index "favorites", ["article_id"], name: "index_favorites_on_article_id"
   add_index "favorites", ["user_id"], name: "index_favorites_on_user_id"
 
+  create_table "follows", force: :cascade do |t|
+    t.integer  "followable_id",                   null: false
+    t.string   "followable_type",                 null: false
+    t.integer  "follower_id",                     null: false
+    t.string   "follower_type",                   null: false
+    t.boolean  "blocked",         default: false, null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
+  add_index "follows", ["followable_id", "followable_type"], name: "fk_followables"
+  add_index "follows", ["follower_id", "follower_type"], name: "fk_follows"
+
   create_table "taggings", force: :cascade do |t|
     t.integer  "tag_id"
     t.integer  "taggable_id"