11.1 -> 11.2.4

Rakefile

@@ -9,3 +9,4 @@ module TempFixForRakeLastComment
 end
 Rake::Application.send :include, TempFixForRakeLastComment
 Rails.application.load_tasks
+task 'test:prepare'
\ No newline at end of file

app/assets/stylesheets/custom.css.scss

@@ -144,6 +144,35 @@ aside {
   }
 }
 
+.stats {
+  overflow: auto;
+  a {
+    float: left;
+    padding: 0 10px;
+    border-left: 1px solid $grayLighter;
+    color: gray;
+    &:first-child {
+      padding-left: 0;
+      border: 0;
+    }
+    &:hover {
+      text-decoration: none;
+      color: $blue;
+    }
+  }
+  strong {
+    display: block;
+  }
+}
+
+.user_avatars {
+  overflow: auto;
+  margin-top: 10px;
+  .gravatar {
+    margin: 1px 1px;
+  }
+}
+
 .gravatar {
   float: left;
   margin-right: 10px;

app/controllers/relationships_controller.rb

+class RelationshipsController < ApplicationController
+  before_action :signed_in_user
+
+  def create
+    @user = User.find(params[:relationship][:followed_id])
+    current_user.follow!(@user)
+    respond_to do |format|
+      format.html { redirect_to @uer }
+      format.js
+    end
+  end
+
+  def destroy
+    @user = Relationship.find(params[:id]).followed
+    current_user.unfollow!(@user)
+    respond_to do |format|
+      format.html { redirect_to @uer }
+      format.js
+    end
+  end
+end
\ No newline at end of file

app/controllers/users_controller.rb

 class UsersController < ApplicationController
-  before_action :signed_in_user, only: [:index, :edit, :update]
+  before_action :signed_in_user, only: [:index, :edit, :update, :destroy, :following, :followers]
   before_action :correct_user, only: [:edit, :update]
   before_action :admin_user, only: :destroy
 
@@ -47,6 +47,20 @@ class UsersController < ApplicationController
     redirect_to users_url
   end
 
+  def following
+    @title = "Following"
+    @user = User.find(params[:id])
+    @users = @user.followed_users.paginate(page: params[:page])
+    render 'show_follow'
+  end
+
+  def followers
+    @title = "Followers"
+    @user = User.find(params[:id])
+    @users = @user.followers.paginate(page: params[:page])
+    render 'show_follow'
+  end
+
   private
 
   def user_params

app/models/relationship.rb

+class Relationship < ActiveRecord::Base
+  belongs_to :follower, class_name: "User"
+  belongs_to :followed, class_name: "User"
+  validates :follower_id, presence: true
+  validates :followed_id, presence: true
+end

app/models/user.rb

 class User < ActiveRecord::Base
   has_many :microposts, dependent: :destroy
-
+  has_many :relationships, foreign_key: "follower_id", dependent: :destroy
+  has_many :followed_users, through: :relationships, source: :followed
+  has_many :reverse_relationships, foreign_key: "followed_id", class_name: "Relationship", dependent: :destroy
+  has_many :followers, through: :reverse_relationships, source: :follower
+  
   validates :name, presence: true, length: { maximum: 50 }
   VALID_EMAIL_REGEX = /[\w+\-.]+@[a-z\d*\-.]+\.[a-z]+/i
   validates :email, presence: true, format: { with: VALID_EMAIL_REGEX }, uniqueness: { case_sensitive: false }
@@ -22,6 +26,18 @@ class User < ActiveRecord::Base
     Micropost.where("user_id = ?", id)
   end
   
+  def following?(other_user)
+    relationships.find_by(followed_id: other_user.id)
+  end
+
+  def follow!(other_user)
+    relationships.create!(followed_id: other_user.id)
+  end
+
+  def unfollow!(other_user)
+    relationships.find_by(followed_id: other_user.id).destroy
+  end
+
   private
 
   def create_remember_token

app/views/shared/_stats.html.erb

+<% @user ||= current_user %>
+<div class="stats">
+  <a href="<%= following_user_path(@user) %>">
+    <strong id="following" class="stat">
+      <%= @user.followed_users.count %>
+    </strong>
+    following
+  </a>
+  <a href="<%= followers_user_path(@user) %>">
+    <strong id="followers" class="stat">
+      <%= @user.followers.count %>
+    </strong>
+    followers
+  </a>
+</div>
\ No newline at end of file

app/views/static_pages/home.html.erb

@@ -5,6 +5,9 @@
         <%= render 'shared/user_info' %>
       </section>
       <section>
+        <%= render 'shared/stats' %>
+      </section>
+      <section>
         <%= render 'shared/micropost_form' %>
       </section>
     </aside>

app/views/users/_fields.html.erb

@@ -9,5 +9,5 @@
 <%= f.label :password %>
 <%= f.password_field :password %>
 
-<%= f.label :password_confirmation, "Confirm Password" %>
+<%= f.label :password_confirmation, "Confirmation" %>
 <%= f.password_field :password_confirmation %>
\ No newline at end of file

app/views/users/_follow.html.erb

+<%= form_for(current_user.relationships.build(followed_id: @user.id), remote: true) do |f| %>
+  <div><%= f.hidden_field :followed_id %></div>
+  <%= f.submit "Follow", class: "btn btn-large btn-primary" %>
+<% end %>
\ No newline at end of file

app/views/users/_follow_form.html.erb

+<% unless current_user?(@user) %>
+  <div id="follow_form">
+  <% if current_user.following?(@user) %>
+    <%= render 'unfollow' %>
+  <% else %>
+    <%= render 'follow' %>
+  <% end %>
+  </div>
+<% end %>
\ No newline at end of file

app/views/users/_unfollow.html.erb

+<%= form_for(current_user.relationships.find_by(followed_id: @user.id),
+             html: { method: :delete }, remote: true) do |f| %>
+  <%= f.submit "Unfollow", class: "btn btn-large" %>
+<% end %>
\ No newline at end of file

app/views/users/show.html.erb

@@ -7,8 +7,12 @@
         <%= @user.name %>
       </h1>
     </section>
+    <section>
+      <%= render 'shared/stats' %>
+    </section>
   </aside>
   <div class="span8">
+    <%= render 'follow_form' if signed_in? %>
     <% if @user.microposts.any? %>
       <h3>Microposts (<%= @user.microposts.count %>)</h3>
       <ol class="microposts">

app/views/users/show_follow.html.erb

+<% provide(:title, @title) %>
+<div class="row">
+  <aside class="span4">
+    <section>
+      <%= gravatar_for @user %>
+      <h1><%= @user.name %></h1>
+      <span><%= link_to "view my profile", @user %></span>
+      <span><b>Microposts:</b> <%= @user.microposts.count %></span>
+    </section>
+    <section>
+      <%= render 'shared/stats' %>
+      <% if @users.any? %>
+        <div class="user_avatars">
+          <% @users.each do |user| %>
+            <%= link_to gravatar_for(user, size: 30), user %>
+          <% end %>
+        </div>
+      <% end %>
+    </section>
+  </aside>
+  <div class="span8">
+    <h3><%= @title %></h3>
+    <% if @users.any? %>
+      <ul class="users">
+        <%= render @users %>
+      </ul>
+      <%= will_paginate %>
+    <% end %>
+  </div>
+</div>
\ No newline at end of file

config/routes.rb

@@ -9,7 +9,12 @@ Rails.application.routes.draw do
   get '/signup', to: 'users#new'
   get '/signin', to: 'sessions#new'
   delete '/signout', to: 'sessions#destroy'
-  resources :users
+  resources :users do
+    member do
+      get :following, :followers
+    end
+  end
   resources :sessions, only: [:new, :create, :destroy]
   resources :microposts, only: [:create, :destroy]
+  resources :relationships, only: [:create, :destroy]
 end

db/migrate/20200709031754_create_relationships.rb

+class CreateRelationships < ActiveRecord::Migration
+  def change
+    create_table :relationships do |t|
+      t.integer :follower_id
+      t.integer :followed_id
+
+      t.timestamps null: false
+    end
+    add_index :relationships, :follower_id
+    add_index :relationships, :followed_id
+    add_index :relationships, [:follower_id, :followed_id], unique: true
+  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: 20200706085817) do
+ActiveRecord::Schema.define(version: 20200709031754) do
 
   create_table "microposts", force: :cascade do |t|
     t.string   "content"
@@ -22,6 +22,17 @@ ActiveRecord::Schema.define(version: 20200706085817) do
 
   add_index "microposts", ["user_id", "created_at"], name: "index_microposts_on_user_id_and_created_at"
 
+  create_table "relationships", force: :cascade do |t|
+    t.integer  "follower_id"
+    t.integer  "followed_id"
+    t.datetime "created_at",  null: false
+    t.datetime "updated_at",  null: false
+  end
+
+  add_index "relationships", ["followed_id"], name: "index_relationships_on_followed_id"
+  add_index "relationships", ["follower_id", "followed_id"], name: "index_relationships_on_follower_id_and_followed_id", unique: true
+  add_index "relationships", ["follower_id"], name: "index_relationships_on_follower_id"
+
   create_table "users", force: :cascade do |t|
     t.string   "name"
     t.string   "email"

lib/tasks/sample_data.rake

 namespace :db do
   desc "Fill database with sample data"
   task populate: :environment do
-    User.create!(name: "Example User",
-                 email: "example@railstutorial.org",
-                 password: "foobar",
-                 password_confirmation: "foobar",
-                 admin: true)
-    99.times do |n|
-      name  = Faker::Name.name
-      email = "example-#{n+1}@railstutorial.org"
-      password  = "password"
-      User.create!(name: name,
-                   email: email,
-                   password: password,
-                   password_confirmation: password)
-    end
-    users = User.all.limit(6)
-    50.times do
-      content = Faker::Lorem.sentence(5)
-      users.each { |user| user.microposts.create!(content: content) }
-    end
+    make_users
+    make_microposts
+    make_relationships
   end
+end
+def make_users
+  admin = User.create!(name: "Example User",
+                      email: "example@railstutorial.org",
+                      password: "foobar",
+                      password_confirmation: "foobar",
+                      admin: true)
+  99.times do |n|
+    name  = Faker::Name.name
+    email = "example-#{n+1}@railstutorial.org"
+    password  = "password"
+    User.create!(name: name,
+                  email: email,
+                  password: password,
+                  password_confirmation: password)
+  end
+end
+
+def make_microposts
+  users = User.all.limit(6)
+  50.times do
+    content = Faker::Lorem.sentence(5)
+    users.each { |user| user.microposts.create!(content: content) }
+  end
+end
+
+def make_relationships
+  users = User.all
+  user = users.first
+  followed_users = users[2..50]
+  followers = users[3..40]
+  followed_users.each { |followed| user.follow!(followed) }
+  followers.each { |follower| follower.follow!(user) }
 end
\ No newline at end of file

spec/controllers/relationships_controller_spec.rb

+require 'spec_helper'
+
+describe RelationshipsController do
+
+  let(:user) { FactoryGirl.create(:user) }
+  let(:other_user) { FactoryGirl.create(:user) }
+
+  before { sign_in user, no_capybara: true }
+
+  describe "creating a relationship with Ajax" do
+
+    it "should increment the Relationship count" do
+      expect do
+        xhr :post, :create, relationship: { followed_id: other_user.id }
+      end.to change(Relationship, :count).by(1)
+    end
+
+    it "should respond with success" do
+      xhr :post, :create, relationship: { followed_id: other_user.id }
+      expect(response).to be_success
+    end
+  end
+
+  describe "destroying a relationship with Ajax" do
+
+    before { user.follow!(other_user) }
+    let(:relationship) do
+      user.relationships.find_by(followed_id: other_user.id)
+    end
+
+    it "should decrement the Relationship count" do
+      expect do
+        xhr :delete, :destroy, id: relationship.id
+      end.to change(Relationship, :count).by(-1)
+    end
+
+    it "should respond with success" do
+      xhr :delete, :destroy, id: relationship.id
+      expect(response).to be_success
+    end
+  end
+end
\ No newline at end of file

spec/models/relationship_spec.rb

+require 'spec_helper'
+
+describe Relationship do
+  let(:follower) { FactoryGirl.create(:user) }
+  let(:followed) { FactoryGirl.create(:user) }
+  let(:relationship) { follower.relationships.build(followed_id: followed.id) }
+
+  subject { relationship }
+
+  it { should be_valid }
+
+  describe "follower methods" do
+    it { should respond_to(:follower) }
+    it { should respond_to(:followed) }
+    its(:follower) { should eq follower }
+    its(:followed) { should eq followed }
+  end
+  
+  describe "when followed id is not present" do
+    before { relationship.followed_id = nil }
+    it { should_not be_valid }
+  end
+
+  describe "when follower id is not present" do
+    before { relationship.follower_id = nil }
+    it { should_not be_valid }
+  end
+end

spec/models/user_spec.rb

@@ -11,13 +11,21 @@ describe User do
   it { should respond_to(:password_digest) }
   it { should respond_to(:password) }
   it { should respond_to(:password_confirmation) }
+  it { should respond_to(:remember_token) }
   it { should respond_to(:authenticate) }
-
   it { should respond_to(:admin) }
   it { should respond_to(:microposts) }
   it { should respond_to(:feed) }
+  it { should respond_to(:relationships) }
+  it { should respond_to(:followed_users) }
+  it { should respond_to(:reverse_relationships) }
+  it { should respond_to(:followers) }
+  it { should respond_to(:following?) }
+  it { should respond_to(:follow!) }
+  it { should respond_to(:unfollow!) }
 
   it { should be_valid }
+  it { should_not be_admin }
 
   describe "when name is not present" do
     before { @user.name = " " }
@@ -98,14 +106,6 @@ describe User do
     it { should be_invalid }
   end
 
-  it { should respond_to(:password_confirmation) }
-  it { should respond_to(:remember_token) }
-  it { should respond_to(:authenticate) }
-  it { should respond_to(:admin) }
-
-  it { should be_valid }
-  it { should_not be_admin }
-
   describe "with admin attribute set to 'true'" do
     before do
       @user.save!
@@ -152,4 +152,27 @@ describe User do
       its(:feed) { should_not include(unfollowed_post) }
     end
   end
+
+  describe "following" do
+    let(:other_user) { FactoryGirl.create(:user) }
+    before do
+      @user.save
+      @user.follow!(other_user)
+    end
+
+    it { should be_following(other_user) }
+    its(:followed_users) { should include(other_user) }
+
+    describe "followed user" do
+      subject { other_user }
+      its(:followers) { should include(@user) }
+    end
+    
+    describe "and unfollowing" do
+      before { @user.unfollow!(other_user) }
+
+      it { should_not be_following(other_user) }
+      its(:followed_users) { should_not include(other_user) }
+    end
+  end
 end

spec/requests/authentication_pages_spec.rb

@@ -91,6 +91,28 @@ describe "AuthenticationPages" do
           before { visit users_path }
           it { should have_title('Sign in') }
         end
+
+        describe "visiting the following page" do
+          before { visit following_user_path(user) }
+          it { should have_title('Sign in') }
+        end
+
+        describe "visiting the followers page" do
+          before { visit followers_user_path(user) }
+          it { should have_title('Sign in') }
+        end
+      end
+
+      describe "in the Relationships controller" do
+        describe "submitting to the create action" do
+          before { post relationships_path }
+          specify { expect(response).to redirect_to(signin_path) }
+        end
+
+        describe "submitting to the destroy action" do
+          before { delete relationship_path(1) }
+          specify { expect(response).to redirect_to(signin_path) }
+        end
       end
     end
 

spec/requests/static_pages_spec.rb

@@ -9,6 +9,33 @@ describe "StaticPages" do
     it { should have_content('Sample App') }
     it { should have_title(full_title('')) }
     it { should_not have_title('| Home') }
+
+    describe "for signed-in users" do
+      let(:user) { FactoryGirl.create(:user) }
+      before do
+        FactoryGirl.create(:micropost, user: user, content: "Lorem")
+        FactoryGirl.create(:micropost, user: user, content: "Ipsum")
+        sign_in user
+        visit root_path
+      end
+  
+      it "should render the user's feed" do
+        user.feed.each do |item|
+          expect(page).to have_selector("li##{item.id}", text: item.content)
+        end
+      end
+  
+      describe "follower/following counts" do
+        let(:other_user) { FactoryGirl.create(:user) }
+        before do
+          other_user.follow!(user)
+          visit root_path
+        end
+  
+        it { should have_link("0 following", href: following_user_path(user)) }
+        it { should have_link("1 followers", href: followers_user_path(user)) }
+      end
+    end
   end
 
   describe "Help page" do

spec/requests/user_pages_spec.rb

@@ -26,6 +26,56 @@ describe "User pages" do
       it { should have_content(m2.content) }
       it { should have_content(user.microposts.count) }
     end
+
+    describe "follow/unfollow buttons" do
+      let(:other_user) { FactoryGirl.create(:user) }
+      before { sign_in user }
+
+      describe "following a user" do
+        before { visit user_path(other_user) }
+
+        it "should increment the followed user count" do
+          expect do
+            click_button "Follow"
+          end.to change(user.followed_users, :count).by(1)
+        end
+
+        it "should increment the other user's followers count" do
+          expect do
+            click_button "Follow"
+          end.to change(other_user.followers, :count).by(1)
+        end
+
+        describe "toggling the button" do
+          before { click_button "Follow" }
+          it { should have_xpath("//input[@value='Unfollow']") }
+        end
+      end
+
+      describe "unfollowing a user" do
+        before do
+          user.follow!(other_user)
+          visit user_path(other_user)
+        end
+
+        it "should decrement the followed user count" do
+          expect do
+            click_button "Unfollow"
+          end.to change(user.followed_users, :count).by(-1)
+        end
+
+        it "should decrement the other user's followers count" do
+          expect do
+            click_button "Unfollow"
+          end.to change(other_user.followers, :count).by(-1)
+        end
+
+        describe "toggling the button" do
+          before { click_button "Unfollow" }
+          it { should have_xpath("//input[@value='Follow']") }
+        end
+      end
+    end
   end
 
   describe "signup" do
@@ -89,7 +139,7 @@ describe "User pages" do
         fill_in "Name",             with: new_name
         fill_in "Email",            with: new_email
         fill_in "Password",         with: user.password
-        fill_in "Confirm Password", with: user.password
+        fill_in "Confirmation",     with: user.password
         click_button "Save changes"
       end
 
@@ -143,4 +193,32 @@ describe "User pages" do
       end
     end
   end
+
+  describe "following/followers" do
+    let(:user) { FactoryGirl.create(:user) }
+    let(:other_user) { FactoryGirl.create(:user) }
+    before { user.follow!(other_user) }
+
+    describe "followed users" do
+      before do
+        sign_in user
+        visit following_user_path(user)
+      end
+
+      it { should have_title(full_title('Following')) }
+      it { should have_selector('h3', text: 'Following') }
+      it { should have_link(other_user.name, href: user_path(other_user)) }
+    end
+
+    describe "followers" do
+      before do
+        sign_in other_user
+        visit followers_user_path(other_user)
+      end
+
+      it { should have_title(full_title('Followers')) }
+      it { should have_selector('h3', text: 'Followers') }
+      it { should have_link(user.name, href: user_path(user)) }
+    end
+  end
 end