『NaCl サマーインターン2024 成果発表』より抜粋

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1. 成果発表 By ホット・エアー3
2. ちょんの担当分 • 固定ポスト #9 • フォロー中のユーザーの最新ポストを表示 #11 • プロフィールに出身地を追加 #16 • ユーザー検索 #12 • ポストの論理削除 #14 • 「いいね」機能 #18 • 捨てられたポストの自動削除 • ハッシュタグ
3. 固定ポスト
4. 固定ポスト app/controllers/microposts_controller.rb class MicropostsController < ApplicationController before_action :require_login before_action :set_micropost, only: %i[update destroy toggle_pinned] before_action :authorize, only: %i[update destroy toggle_pinned] def toggle_pinned @micropost.toggle(:pinned).save! redirect_to current_user, status: :see_other end end
5. 固定ポスト app/models/micropost.rb class Micropost < ApplicationRecord default_scope -> { order(pinned: :desc, created_at: :desc) } after_save :ensure_single_pinned_post, if: -> { saved_change_to_pinned?(from: false, to: true) } private def ensure_single_pinned_post user.microposts.where(pinned: true).where.not(id: id).update_all(pinned: false) end end
6. ユーザー検索
7. ユーザー検索 config/initializers/constants.rb PREFECTURES = %w[ hokkaido aomori iwate ... ].freeze BIRTHPLACES = [*PREFECTURES, 'overseas'].freeze
8. ユーザー検索 app/views/users/index.html.erb <%= form_with url: users_path, method: :get do |f| %> <%= f.text_field :search_query %> <%= f.select :birthplaces, BIRTHPLACES.map { |p| [p.capitalize, p] }, {}, { multiple: true, size: 10 } %> <%= f.submit 'Search' %> <% end %> <% if @users.any? %> <%= will_paginate %> <ul class='users'> <%= render @users %> </ul> <%= will_paginate %> <% else %> <p>No users found.</p> <% end %>
9. ユーザー検索 app/models/user.rb class User < ApplicationRecord def self.search_by(query) if query.blank? all else q = "%#{sanitize_sql_like(query)}%" where('name LIKE ?', q).or(where('email LIKE ?', q)) end end end
10. ユーザー検索 app/controllers/users_controller.rb class UsersController < ApplicationController def index @users = if (b = params[:birthplaces]&.without('')).present? User.search_by(params[:search_query]) .where(birthplace: b) .paginate(page: params[:page]) else User.search_by(params[:search_query]) .paginate(page: params[:page]) end end end
11. ポストの論理削除
12. ポストの論理削除 app/controllers/microposts_controller.rb class MicropostsController < ApplicationController before_action :require_login before_action :set_micropost, only: %i[restore destroy] before_action :authorize, only: %i[restore destroy] def restore @micropost.undiscard redirect_back_or_to root_path, flash: { success: 'Micropost restored' } end def destroy @micropost.discard || @micropost.destroy! redirect_back_or_to root_path, status: :see_other, flash: { success: 'Micropost deleted' } end end
13. ポストの論理削除 app/models/micropost.rb class Micropost < ApplicationRecord include Discard::Model before_save -> { update_column(:pinned, false) }, if: -> { will_save_change_to_discarded_at?(from: nil) && pinned_in_database } end
14. 捨てられたポストの自動削除 config/schedule.rb env :PATH, ENV['PATH'] set :output, 'log/cron.log' every :day, at: '3:00am' do rake 'microposts:empty_trash' end
15. 捨てられたポストの自動削除 lib/tasks/microposts.rake namespace :microposts do desc 'Empty trash' task empty_trash: :environment do destroyed = Micropost.where(discarded_at: ..30.days.ago).destroy_all puts "Destroyed #{destroyed.length} microposts." end end
16. ハッシュタグ
17. ハッシュタグ app/models/micropost.rb class Micropost < ApplicationRecord has_and_belongs_to_many :tags after_save :tag, if: :saved_change_to_content? private def tag tags.clear unless tags.empty? self.tags = content.scan(/(?<=#)[^\s#]+/).uniq.map do |w| Tag.find_or_create_by!(name: w) end end end
18. ハッシュタグ app/helpers/microposts_helper.rb module MicropostsHelper def render_with_hashtags(content) content.gsub(/#[^\s#]+/) do |ht| link_to w, "/microposts/hashtag/#{ht[1..]}" end end end
19. ご清聴ありがとうございました！