Add experience level averaging to articles (#1922)

* Add experience level averaging to articles

* Adjust copy on /mod ratings page

app/assets/javascripts/initializers/initializeFetchFollowedArticles.js.erb

@@ -33,6 +33,7 @@ function insertNewArticles(user){
       var containsOrganizationID = findOne([article.organization_id], user.followed_organization_ids || [])
       var intersectedTags = intersect_arrays(user.followed_tag_names, article.cached_tag_list_array)
       var followedPoints = 1
+      var experienceDifference = Math.abs(article['experience_level_rating'] - user.experience_level)
       JSON.parse(user.followed_tags).map(function(tag) {
         if (intersectedTags.includes(tag.name)) {
           followedPoints = followedPoints + tag.points
@@ -51,6 +52,7 @@ function insertNewArticles(user){
       } else if (rand < 0.6) {
         articlePoints = articlePoints + 2
       }
+      articlePoints = articlePoints - (experienceDifference/2);
       article['points'] = articlePoints
     });
     var sortedArticles = articlesJSON.sort(function(a, b) {
@@ -70,12 +72,13 @@ function insertTopArticles(user){
   var articlesJSON = JSON.parse(el.dataset.articles)
   var insertPlace = document.getElementById("article-index-hidden-div");
   if (insertPlace) {
-      articlesJSON.forEach(function(article){
+    articlesJSON.forEach(function(article){
       var articlePoints = 0
       var containsUserID = findOne([article.user_id], user.followed_user_ids || [])
       var containsOrganizationID = findOne([article.organization_id], user.followed_organization_ids || [])
       var intersectedTags = intersect_arrays(user.followed_tag_names, article.cached_tag_list_array)
       var followedPoints = 1
+      var experienceDifference = Math.abs(article['experience_level_rating'] - user.experience_level)
       JSON.parse(user.followed_tags).map(function(tag) {
         if (intersectedTags.includes(tag.name)) {
           followedPoints = followedPoints + tag.points
@@ -94,6 +97,7 @@ function insertTopArticles(user){
       } else if (rand < 0.6) {
         articlePoints = articlePoints + 2
       }
+      articlePoints = articlePoints - (experienceDifference/2);
       article['points'] = articlePoints
     });
     var sortedArticles = articlesJSON.sort(function(a, b) {

app/controllers/async_info_controller.rb

@@ -46,7 +46,8 @@ class AsyncInfoController < ApplicationController
         checked_code_of_conduct: @user.checked_code_of_conduct,
         number_of_comments: @user.comments.count,
         display_sponsors: @user.display_sponsors,
-        trusted: @user.trusted
+        trusted: @user.trusted,
+        experience_level: @user.experience_level
       }
     end
   end

app/controllers/moderations_controller.rb

@@ -1,6 +1,20 @@
 class ModerationsController < ApplicationController
   after_action :verify_authorized
 
+  def index
+    authorize(User, :moderation_routes?)
+    @articles = Article.where(published: true).
+      includes(:rating_votes).
+      where("rating_votes_count < 3").
+      where("score > -5").
+      order("featured_number DESC").limit(50)
+    if params[:tag].present?
+      @articles = @articles.
+        cached_tagged_with(params[:tag])
+    end
+    @articles = @articles.decorate
+  end
+
   def article
     authorize(User, :moderation_routes?)
     @moderatable = Article.find_by_slug(params[:slug])

app/controllers/rating_votes_controller.rb

@@ -0,0 +1,24 @@
+class RatingVotesController < ApplicationController
+  after_action :verify_authorized
+
+  def create
+    authorize RatingVote
+    rating_vote = RatingVote.where(user_id: current_user.id, article_id: rating_vote_params[:article_id]).first || RatingVote.new
+    rating_vote.user_id = current_user.id
+    rating_vote.article_id = rating_vote_params[:article_id]
+    rating_vote.rating = rating_vote_params[:rating].to_f
+    rating_vote.group = rating_vote_params[:group]
+    if rating_vote.save
+      rating_vote.assign_article_rating
+      redirect_back(fallback_location: "/mod")
+    else
+      render json: { result: "Not Upserted Successfully" }
+    end
+  end
+
+  private
+
+  def rating_vote_params
+    params.require(:rating_vote).permit(policy(RatingVote).permitted_attributes)
+  end
+end

app/controllers/stories_controller.rb

@@ -106,7 +106,7 @@ class StoriesController < ApplicationController
   def handle_base_index
     @home_page = true
     @page = (params[:page] || 1).to_i
-    num_articles = 25
+    num_articles = 30
     @stories = article_finder(num_articles)
     add_param_context(:page, :timeframe)
     if ["week", "month", "year", "infinity"].include?(params[:timeframe])

app/models/article.rb

@@ -17,7 +17,8 @@ class Article < ApplicationRecord
   belongs_to :collection, optional: true
   has_many :comments, as: :commentable
   has_many :buffer_updates
-  has_many  :notifications, as: :notifiable
+  has_many :notifications, as: :notifiable
+  has_many :rating_votes
 
   validates :slug, presence: { if: :published? }, format: /\A[0-9a-z-]*\z/,
                    uniqueness: { scope: :user_id }
@@ -76,6 +77,7 @@ class Article < ApplicationRecord
     :main_image, :main_image_background_hex_color, :updated_at, :slug,
     :video, :user_id, :organization_id, :video_source_url, :video_code,
     :video_thumbnail_url, :video_closed_caption_track_url,
+    :experience_level_rating, :experience_level_rating_distribution,
     :published_at, :crossposted_at, :boost_states, :description, :reading_time, :video_duration_in_seconds)
   }
 
@@ -137,8 +139,8 @@ class Article < ApplicationRecord
                   per_environment: true,
                   enqueue: :trigger_delayed_index do
       attributes :title, :path, :class_name, :comments_count, :reading_time,
-        :tag_list, :positive_reactions_count, :id, :hotness_score, :score, :readable_publish_date,
-        :flare_tag, :user_id, :organization_id, :cloudinary_video_url, :video_duration_in_minutes
+        :tag_list, :positive_reactions_count, :id, :hotness_score, :score, :readable_publish_date, :flare_tag, :user_id,
+        :organization_id, :cloudinary_video_url, :video_duration_in_minutes, :experience_level_rating, :experience_level_rating_distribution
       attribute :published_at_int do
         published_at.to_i
       end

app/models/rating_vote.rb

@@ -0,0 +1,27 @@
+class RatingVote < ApplicationRecord
+  belongs_to :article
+  belongs_to :user
+
+  validates_uniqueness_of :user_id, scope: :article_id
+  validates :group, inclusion: { in: %w(experience_level) }
+  validates :rating, numericality: { greater_than: 0.0, less_than_or_equal_to: 10.0 }
+  validate :permissions
+  counter_culture :article
+  counter_culture :user
+
+  def assign_article_rating
+    ratings = article.rating_votes.where(group: group).pluck(:rating)
+    average = ratings.sum / ratings.size
+    article.update_column(:experience_level_rating, average)
+    article.update_column(:experience_level_rating_distribution, ratings.sort.max - ratings.sort.min)
+    article.update_column(:last_experience_level_rating_at, Time.current)
+  end
+
+  private
+
+  def permissions
+    unless user&.trusted
+      errors.add(:user_id, "is not permitted to take this action.")
+    end
+  end
+end

app/models/user.rb

@@ -35,6 +35,7 @@ class User < ApplicationRecord
   has_many    :chat_channels, through: :chat_channel_memberships
   has_many    :push_notification_subscriptions, dependent: :destroy
   has_many    :feedback_messages
+  has_many    :rating_votes
   has_many    :html_variants, dependent: :destroy
   has_many :mentor_relationships_as_mentee,
   class_name: "MentorRelationship", foreign_key: "mentee_id"
@@ -65,6 +66,7 @@ class User < ApplicationRecord
             exclusion: { in: ReservedWords.all, message: "username is reserved" }
   validates :twitter_username, uniqueness: { allow_blank: true }
   validates :github_username, uniqueness: { allow_blank: true }
+  validates :experience_level, numericality: { less_than_or_equal_to: 10 }, allow_blank: true
   validates :text_color_hex, format: /\A#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})\z/, allow_blank: true
   validates :bg_color_hex, format: /\A#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})\z/, allow_blank: true
   validates :website_url, :employer_url, :mastodon_url,

app/policies/rating_vote_policy.rb

@@ -0,0 +1,9 @@
+class RatingVotePolicy < ApplicationPolicy
+  def create?
+    !user_is_banned?
+  end
+
+  def permitted_attributes
+    %i[rating group article_id]
+  end
+end

app/policies/user_policy.rb

@@ -73,6 +73,7 @@ class UserPolicy < ApplicationPolicy
        employer_name
        employer_url
        employment_title
+       experience_level
        facebook_url
        feed_admin_publish_permission
        feed_mark_canonical

app/views/moderations/index.html.erb

@@ -0,0 +1,62 @@
+<style>
+  .level-rating-button {
+    border-radius: 8px;
+    font-size: 1.1em;
+    padding: 3px;
+    width: 42px;
+    border: 2px solid black;
+    font-weight: bold;
+  }
+  .level-rating-button.selected {
+    background: #9bebff;
+  }
+</style>
+
+<br /><br /><br /><br />
+<center>
+  <h1>Mod Convenience Dashboard</h1>
+  <h2>Add "Experience Level" ratings</h2>
+  <h5>More mod tools will be added as they are created.</h5>
+</center>
+<div class="container">
+  <% @articles.each do |article| %>
+    <% @rating_vote = article.rating_votes.where(user_id: current_user.id).first %>
+    <% unless @rating_vote %>
+      <div style="border-bottom: 2px solid black; margin-bottom: 15px;">
+        <center>
+          <h1><%= article.title %></h1>
+          <% cache("main-article-tags-#{article.cached_tag_list}", expires_in: 30.hours) do %>
+            <div class="tags">
+              <% article.cached_tag_list_array.each do |tag| %>
+                <a class="tag" href="/t/<%= tag %>" style="background-color:<%= tag_colors(tag)[:background] %>;color:<%= tag_colors(tag)[:color] %>">#<%= tag %></a>
+              <% end %>
+            </div>
+          <% end %>
+        </center>
+        <div class="body">
+        <%= HTML_Truncator.truncate(article.processed_html,
+              200, ellipsis: '<a class="comment-read-more" href="' + article.path + '">... Read Entire Post</a>').html_safe %>
+        </div>
+        <center>
+          <h2><a href="<%= article.path %>/mod">Moderate</a></h2>
+          <h2>Experience Level Target:</h2>
+          <%= form_for(RatingVote.new) do |f| %>
+            <%= f.hidden_field :article_id, value: article.id %>
+            <%= f.hidden_field :group, value: "experience_level" %>
+            <button value="1" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 1.0 %>">1</button>
+            <button value="2" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 2.0 %>">2</button>
+            <button value="3" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 3.0 %>">3</button>
+            <button value="4" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 4.0 %>">4</button>
+            <button value="5" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 5.0 %>">5</button>
+            <button value="6" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 6.0 %>">6</button>
+            <button value="7" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 7.0 %>">7</button>
+            <button value="8" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 8.0 %>">8</button>
+            <button value="9" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 9.0 %>">9</button>
+            <button value="10" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 10.0 %>">10</button>
+          <% end %>
+          <br /><br />
+        </center>
+      </div>
+    <% end %>
+  <% end %>
+</div>

app/views/moderations/mod.html.erb

@@ -55,6 +55,17 @@
     height: 50px;
     border: 1px solid #888;
   }
+  .level-rating-button {
+    border-radius: 8px;
+    font-size: 1.1em;
+    padding: 3px;
+    width: 42px;
+    border: 2px solid black;
+    font-weight: bold;
+  }
+  .level-rating-button.selected {
+    background: #9bebff;
+  }
 </style>
 
 <div class="container" style="text-align: center">
@@ -74,7 +85,7 @@
     <h1> ADMIN: <a href="/admin/comments/<%= @moderatable.id %>" data-no-instant>Comment Admin</a> | <a href="/admin/users/<%= @moderatable.user_id %>" data-no-instant>User Admin</a></h1>
   <% else %>
     <p style="width: 90%;margin:50px auto;text-align:left">
-      <b style="font-size:1.3em">All negative reactions are 100% private.</b>
+      <b style="font-size:1.3em">All negative reactions are private.</b>
       <br><br>Use the <b>thumbsdown(👎)</b> to move something "down" for any reason (quality, usefulness, code of conduct grey area).
       <br><br>The <b>vomit(🤢)</b> is for code of conduct violations (harassment, being an asshole, spam, etc.).
       <br><br>The DEV team will be notified about vomits and take appropriate action, but leaving a level-headed comment addressing the behavior is welcome if you feel up for it.
@@ -110,6 +121,31 @@
       <% end %>
     </div>
   <% end %>
+  <% if @moderatable.class.name == "Article" %>
+    <% @rating_vote = RatingVote.where(article_id: @moderatable.id, user_id: current_user.id).first %>
+    <%= form_for(RatingVote.new) do |f| %>
+      <h2>Experience Level of Post</h2>
+      <%= f.hidden_field :article_id, value: @moderatable.id %>
+      <%= f.hidden_field :group, value: "experience_level" %>
+      <button value="1" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 1.0 %>">1</button>
+      <button value="2" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 2.0 %>">2</button>
+      <button value="3" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 3.0 %>">3</button>
+      <button value="4" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 4.0 %>">4</button>
+      <button value="5" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 5.0 %>">5</button>
+      <button value="6" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 6.0 %>">6</button>
+      <button value="7" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 7.0 %>">7</button>
+      <button value="8" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 8.0 %>">8</button>
+      <button value="9" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 9.0 %>">9</button>
+      <button value="10" name="rating_vote[rating]" class="level-rating-button <%= "selected" if @rating_vote&.rating == 10.0 %>">10</button>
+    <% end %>
+    <p style="width: 90%;margin:50px auto;text-align:left">
+      <b style="font-size:1.1em">All rating votes are private.</b>
+      <br><br>Provide a rating between 1 and 10 based on which audience would find this post most valuable.
+      <br><br>1: for brand new developers, 3: for junior developers, 10: for very advanced developers, etc.
+      <br><br>This will provide <em>approximate and gentle</em> algorithmic adjustments to help deliver relevant content.
+      <br><br>It will be used as one of many indicators. No one rating will have an overly dramatic affect.
+    </p>
+  <% end %>
 </div>
 
 <script defer>

app/views/stories/_main_stories_feed.html.erb

@@ -9,8 +9,9 @@
          decorate %>
     <div id="new-articles-object" data-articles="
       <%= @new_stories.to_json(
-            only: %i[title path id user_id comments_count positive_reactions_count
-                     organization_id reading_time video_thumbnail_url video],
+            only: %i[title path id user_id comments_count positive_reactions_count organization_id
+                     reading_time video_thumbnail_url video video_duration_in_minutes
+                     experience_level_rating experience_level_rating_distribution],
             methods: %i[readable_publish_date cached_tag_list_array flare_tag class_name
                         cloudinary_video_url video_duration_in_minutes],
             include: {
@@ -22,7 +23,8 @@
     <div id="home-articles-object" data-articles="
       <%= @stories.to_json(
             only: %i[title path id user_id comments_count positive_reactions_count organization_id
-                     reading_time video_thumbnail_url video video_duration_in_minutes],
+                     reading_time video_thumbnail_url video video_duration_in_minutes
+                     experience_level_rating experience_level_rating_distribution],
             methods: %i[readable_publish_date cached_tag_list_array flare_tag class_name
                         cloudinary_video_url video_duration_in_minutes],
             include: {

app/views/users/_misc.html.erb

@@ -22,6 +22,19 @@
       <%= f.submit "SUBMIT", class: "cta" %>
     </div>
 <% end %>
+<h2>Feed Customization</h2>
+<%= form_for(@user) do |f| %>
+    <div class="sub-field">
+      <%= f.label :experience_level, "Enter your coding experience level (1-10)" %>
+      <%= f.text_field :experience_level %>
+      <sub><em>This will not be displayed on your profile or anywhere publicly. It will help determine what content you are shown along with tags you follow etc.</em></sub>
+    </div>
+    <div class="field">
+      <label></label>
+      <%= f.hidden_field :tab, value: @tab %>
+      <%= f.submit "SUBMIT", class: "cta" %>
+    </div>
+<% end %>
 <h2>Languages</h2>
 <h3>Select which languages you'd prefer to see in your feed <span style="color:#e05252">(beta)</span></h3>
 <h4 style="font-weight:400">

config/routes.rb

@@ -130,6 +130,7 @@ Rails.application.routes.draw do
   resources :html_variant_successes, only: [:create]
   resources :push_notification_subscriptions, only: [:create]
   resources :tag_adjustments, only: [:create]
+  resources :rating_votes, only: [:create]
 
   get "/notifications/:filter" => "notifications#index"
   get "/notifications/:filter/:org_id" => "notifications#index"
@@ -236,6 +237,7 @@ Rails.application.routes.draw do
   get "/memberships", to: redirect("/membership")
   get "/shop", to: redirect("https://shop.dev.to/")
   get "/tag-moderation" => "pages#tag_moderation"
+  get "/mod" => "moderations#index"
 
   post "/fallback_activity_recorder" => "ga_events#create"
 

db/migrate/20190227163543_add_experience_level_to_posts.rb

@@ -0,0 +1,9 @@
+class AddExperienceLevelToPosts < ActiveRecord::Migration[5.1]
+  def change
+    add_column :articles, :experience_level_rating, :float, default: 5.0
+    add_column :articles, :experience_level_rating_distribution, :float, default: 5.0
+    add_column :articles, :last_experience_level_rating_at, :datetime
+    add_column :articles, :rating_votes_count, :integer, null: false, default: 0
+    add_column :users, :rating_votes_count, :integer, null: false, default: 0
+  end
+end

db/migrate/20190227163803_create_rating_votes.rb

@@ -0,0 +1,13 @@
+class CreateRatingVotes < ActiveRecord::Migration[5.1]
+  def change
+    create_table :rating_votes do |t|
+      t.bigint   :user_id
+      t.bigint   :article_id
+      t.string   :group
+      t.float    :rating
+      t.timestamps
+    end
+    add_index :rating_votes, :user_id
+    add_index :rating_votes, :article_id
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20190216185753) do
+ActiveRecord::Schema.define(version: 20190227163803) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -69,6 +69,8 @@ ActiveRecord::Schema.define(version: 20190216185753) do
     t.string "description"
     t.datetime "edited_at"
     t.boolean "email_digest_eligible", default: true
+    t.float "experience_level_rating", default: 5.0
+    t.float "experience_level_rating_distribution", default: 5.0
     t.datetime "facebook_last_buffered"
     t.boolean "featured", default: false
     t.float "featured_clickthrough_rate", default: 0.0
@@ -81,6 +83,7 @@ ActiveRecord::Schema.define(version: 20190216185753) do
     t.string "language"
     t.datetime "last_buffered"
     t.datetime "last_comment_at", default: "2017-01-01 05:00:00"
+    t.datetime "last_experience_level_rating_at"
     t.datetime "last_invoiced_at"
     t.decimal "lat", precision: 10, scale: 6
     t.boolean "live_now", default: false
@@ -100,6 +103,7 @@ ActiveRecord::Schema.define(version: 20190216185753) do
     t.boolean "published", default: false
     t.datetime "published_at"
     t.boolean "published_from_feed", default: false
+    t.integer "rating_votes_count", default: 0, null: false
     t.integer "reactions_count", default: 0, null: false
     t.integer "reading_time", default: 0
     t.boolean "receive_notifications", default: true
@@ -573,6 +577,17 @@ ActiveRecord::Schema.define(version: 20190216185753) do
     t.index ["user_id"], name: "index_push_notification_subscriptions_on_user_id"
   end
 
+  create_table "rating_votes", force: :cascade do |t|
+    t.bigint "article_id"
+    t.datetime "created_at", null: false
+    t.string "group"
+    t.float "rating"
+    t.datetime "updated_at", null: false
+    t.bigint "user_id"
+    t.index ["article_id"], name: "index_rating_votes_on_article_id"
+    t.index ["user_id"], name: "index_rating_votes_on_user_id"
+  end
+
   create_table "reactions", id: :serial, force: :cascade do |t|
     t.string "category"
     t.datetime "created_at", null: false
@@ -797,6 +812,7 @@ ActiveRecord::Schema.define(version: 20190216185753) do
     t.datetime "personal_data_updated_at"
     t.string "profile_image"
     t.datetime "profile_updated_at", default: "2017-01-01 05:00:00"
+    t.integer "rating_votes_count", default: 0, null: false
     t.integer "reactions_count", default: 0, null: false
     t.datetime "remember_created_at"
     t.string "remember_token"

spec/factories/rating_votes.rb

@@ -0,0 +1,6 @@
+FactoryBot.define do
+  factory :rating_vote do
+    group { "experience_level" }
+    rating { rand(1.0..8.0) }
+  end
+end

spec/models/rating_vote_spec.rb

@@ -0,0 +1,56 @@
+require "rails_helper"
+
+RSpec.describe RatingVote, type: :model do
+  let(:user) { create(:user, :trusted) }
+  let(:user2)        { create(:user, :trusted) }
+  let(:user3)        { create(:user, :trusted) }
+  let(:article) { create(:article, user_id: user.id) }
+
+  describe "validations" do
+    it { is_expected.to validate_numericality_of(:rating).is_greater_than(0.0).is_less_than_or_equal_to(10.0) }
+    it { is_expected.to validate_inclusion_of(:group).in_array(%w(experience_level)) }
+  end
+
+  describe "uniqueness" do
+    it "does allow a user to create one rating for one article" do
+      rating = build(:rating_vote, article_id: article.id, user_id: user.id)
+      expect(rating).to be_valid
+    end
+    it "does not allow a user to create multiple ratings for one article" do
+      create(:rating_vote, article_id: article.id, user_id: user.id)
+      rating = build(:rating_vote, article_id: article.id, user_id: user.id)
+      expect(rating).not_to be_valid
+    end
+  end
+
+  describe "modifies article rating score" do
+    it "assigns article rating" do
+      rating = create(:rating_vote, article_id: article.id, user_id: user.id, rating: 2.0)
+      create(:rating_vote, article_id: article.id, user_id: user2.id, rating: 3.0)
+      rating.assign_article_rating
+      expect(article.reload.experience_level_rating).to eq(2.5)
+      expect(article.reload.experience_level_rating_distribution).to eq(1.0)
+    end
+
+    it "assigns article rating with larger distribution" do
+      rating = create(:rating_vote, article_id: article.id, user_id: user.id, rating: 1.0)
+      create(:rating_vote, article_id: article.id, user_id: user2.id, rating: 7.0)
+      rating.assign_article_rating
+      expect(article.reload.experience_level_rating).to eq(4.0)
+      expect(article.reload.experience_level_rating_distribution).to eq(6.0)
+    end
+  end
+
+  describe "permissions" do
+    it "allows trusted users to make rating" do
+      rating = build(:rating_vote, article_id: article.id, user_id: user.id)
+      expect(rating).to be_valid
+    end
+
+    it "does not allow non-trusted users to make rating" do
+      nontrusted_user = create(:user)
+      rating = build(:rating_vote, article_id: article.id, user_id: nontrusted_user.id)
+      expect(rating).not_to be_valid
+    end
+  end
+end

spec/requests/moderations_spec.rb

@@ -37,14 +37,24 @@ RSpec.describe "Moderations", type: :request do
   context "when user is trusted" do
     before { sign_in user }
 
-    it "grant acess to comment moderation" do
+    it "grant access to comment moderation" do
       get comment.path + "/mod"
       expect(response).to have_http_status(200)
     end
 
-    it "grant acess to article moderation" do
+    it "grant access to article moderation" do
       get article.path + "/mod"
       expect(response).to have_http_status(200)
     end
+
+    it "grants access to /mod index" do
+      get "/mod"
+      expect(response).to have_http_status(200)
+    end
+    it "grants access to /mod index with articles" do
+      create(:article, published: true)
+      get "/mod"
+      expect(response.body).to include("Experience Level Target")
+    end
   end
 end

spec/requests/rating_votes_spec.rb

@@ -0,0 +1,33 @@
+# http://localhost:3000/rating_votes
+require "rails_helper"
+
+RSpec.describe "RatingVotes", type: :request do
+  let(:user) { create(:user, :trusted) }
+  let(:article) { create(:article) }
+
+  before do
+    sign_in user
+  end
+
+  describe "POST /rating_votes" do
+    it "creates a new rating vote" do
+      post "/rating_votes", params: {
+        rating_vote: {
+          article_id: article.id, group: "experience_level", rating: 3.0
+        }
+      }
+      expect(RatingVote.last.rating).to eq(3.0)
+      expect(RatingVote.last.user_id).to eq(user.id)
+    end
+
+    it "does not create new rating vote for non-trusted user" do
+      user.remove_role(:trusted)
+      post "/rating_votes", params: {
+        rating_vote: {
+          article_id: article.id, group: "experience_level", rating: 3.0
+        }
+      }
+      expect(RatingVote.all.size).to eq(0)
+    end
+  end
+end