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【Rails】impressionistを用いてPV数ランキングの実装

Last updated at Posted at 2020-06-12

目標

ezgif.com-video-to-gif.gif

開発環境

・Ruby: 2.5.7
・Rails: 5.2.4
・Vagrant: 2.2.7
・VirtualBox: 6.1
・OS: macOS Catalina

前提

下記実装済み。

Slim導入
ログイン機能実装

実装

1.impressionistを導入

※バージョンを指定する事に注意!(指定しないとエラーが出た)

Gemfile
gem 'impressionist', '~>1.6.1'
ターミナル
$ bundle
ターミナル
$ rails g impressionist
ターミナル
$ rails db:migrate
schema.rb
create_table "impressions", force: :cascade do |t|
  t.string "impressionable_type"
  t.integer "impressionable_id"
  t.integer "user_id"
  t.string "controller_name"
  t.string "action_name"
  t.string "view_name"
  t.string "request_hash"
  t.string "ip_address"
  t.string "session_hash"
  t.text "message"
  t.text "referrer"
  t.text "params"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
  t.index ["controller_name", "action_name", "ip_address"], name: "controlleraction_ip_index"
  t.index ["controller_name", "action_name", "request_hash"], name: "controlleraction_request_index"
  t.index ["controller_name", "action_name", "session_hash"], name: "controlleraction_session_index"
  t.index ["impressionable_type", "impressionable_id", "ip_address"], name: "poly_ip_index"
  t.index ["impressionable_type", "impressionable_id", "params"], name: "poly_params_request_index"
  t.index ["impressionable_type", "impressionable_id", "request_hash"], name: "poly_request_index"
  t.index ["impressionable_type", "impressionable_id", "session_hash"], name: "poly_session_index"
  t.index ["impressionable_type", "message", "impressionable_id"], name: "impressionable_type_message_index"
  t.index ["user_id"], name: "index_impressions_on_user_id"
end

2.カラムを追加

ターミナル
$ rails g migration AddImpressionsCountToUsers impressions_count:integer
~_add_impressions_count_to_users.rb
class AddImpressionsCountToUsers < ActiveRecord::Migration[5.2]
  def change
    # 「default: 0」を追記
    add_column :users, :impressions_count, :integer, default: 0
  end
end
ターミナル
$ rails db:migrate

3.モデルを編集

user.rb
# 追記
is_impressionable counter_cache: true

is_impressionable
➡︎ Userモデルでimpressionistを使用出来る様にする。

counter_cache: trueを必ず付与して下さい。

4.コントローラーを編集

users_controller.rb
def index
  @users = User.order(impressions_count: 'DESC') # ソート機能を追加
end

def show
  @user = User.find(params[:id])
  impressionist(@user, nil, unique: [:session_hash]) # 追記
end

User.order(impressions_count: 'DESC')
➡︎ ユーザー一覧をPV数の多い順に並び替える。

impressionist(@user, nil, unique: [:session_hash])
➡︎ ユーザー詳細ページにアクセスするとPV数が1つ増える。

【IPアドレスで計測する場合】
impressionist(@tourist_spot, nil, unique: [:impressionable_id, :ip_address])

※自主的にPV数を伸ばす事が出来ない様に、1ユーザーにつきPV数をカウントするのは1回まで。

5.ビューを編集

users/index.html.slim
table.table
  thead
    tr
      th
        | 順位
      th
        | 氏名
      th
        | PV数

  tbody
    - @users.each.with_index(1) do |user, index|
      tr
        td
          = index
          |td
          = link_to user do
            = user.name
        td
          / PV数を表示
          = user.impressions_count
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