【民泊5.1】【Windows】アバター（Gravatar）

アバター登録は以下の手順でできます。
mrradiology.hatenablog.jp

記述追加　GemFile（58行目）

gem 'gravtastic'

GemFile

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.0.7', '>= 5.0.7.1'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 3.0'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 3.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platform: :mri
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

#bootstrap
gem 'bootstrap-sass', '~> 3.4.1'

#デバイス
gem 'devise', '~>4.2'
gem 'jquery-rails'

#Gravatar
gem 'gravtastic'

コマンド
bundle

記述追加　app\models\user.rb(3行目)

  include Gravtastic
  gravtastic

app\models\user.rb

class User < ApplicationRecord

  # アバター画像表示用
  include Gravtastic
  gravtastic

  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable

  #長さ50文字以下　入力必須
  validates :fullname, presence: true, length: {maximum: 50}         
end

記述追加　app\assets\javascripts\application.js（16行目）

//= require gravtastic

app\assets\javascripts\application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or any plugin's vendor/assets/javascripts directory can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// compiled file. JavaScript code in this file should be added after the last require_* statement.
//
// Read Sprockets README (https://github.com/rails/sprockets#sprockets-directives) for details
// about supported directives.
//
//= require jquery
//= require bootstrap-sprockets
//= require jquery_ujs
//= require gravtastic
//= require turbolinks
//= require_tree .

ナビゲーションバーにアバター画像を追加します。

記述追加　app\views\shared\_navbar.html.erb (22行目)

<%= image_tag current_user.gravatar_url, class: "img-circle avatar-small" %>&nbsp;

app\views\shared\_navbar.html.erb

<!-- ナビゲーションバー -->
<nav class="navbar navbar-default navbar-static-top">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <span class="sr-only">ナビゲーション　トグル</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">テストサイトMinpaku</a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <ul class="nav navbar-nav navbar-right">
        <% if (!user_signed_in?) %>
            <li><%= link_to "ログイン", new_user_session_path %></li>
            <li><%= link_to "新規ユーザ登録", new_user_registration_path %></li>
        <% else %>

            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                <!-- アバター画像　-->
                <%= image_tag current_user.gravatar_url, class: "img-circle avatar-small" %>&nbsp;
                <!-- 氏名表示に変更　-->
                <%= current_user.fullname %>
                <span class="caret"></span>
              </a>
              <ul class="dropdown-menu">
                <li><a href="#"></a></li>
                <li><a href="#"></a></li>
                <li><a href="#"></a></li>
                <li><a href="#"></a></li>
                <li role="separator" class="divider"></li>
                <li><%= link_to "ユーザ登録情報修正", edit_user_registration_path %></li>
                <li><%= link_to "ログアウト", destroy_user_session_path, method: :delete %></li>
              </ul>
            </li>
        <% end %>
      </ul>
    </div>
  </div>
</nav>

ブラウザ確認
http://localhost:3000/

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