rails tutorils: signup

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how to signup in website using ruby on rails

Users 资源

config/routes.rb

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Rails.application.routes.draw do
    root 'static_pages#home'
    get '/help', to: 'static_pages#help' 
    get '/about', to: 'static_pages#about' 
    get '/contact', to: 'static_pages#contact' 
    get '/signup', to: 'users#new'
    
    resources :users
end
Users Resources

Gravatar 头像和侧边栏

app/views/users/show.html.erb

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<% provide(:title, @user.name) %> 
<div class="row">
    <aside class="col-md-4"> 
        <section class="user_info">
            <h1>
                <%= gravatar_for @user %>
                <%= @user.name %> </h1>
        </section>
    </aside>
</div>

app/assets/stylesheets/custom.scss

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/* sidebar */
aside { 
    section.user_info {
        margin-top: 20px; }
    section {
        padding: 10px 0; margin-top: 20px; &:first-child {
            border: 0;
            padding-top: 0; }
        span {
            display: block; margin-bottom: 3px; line-height: 1;}
        h1 {
            font-size: 1.4em; text-align: left; letter-spacing: -1px; margin-bottom: 3px; margin-top: 0px;
        } 
    }
}

.gravatar {
    float: left; margin-right: 10px;
}

.gravatar_edit { 
    margin-top: 15px;
}

app/helpers/users_helper.rb

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module UsersHelper
    def gravatar_for(user, options = { size: 80 })
        size = options[:size]
        gravatar_id = Digest::MD5::hexdigest(user.email.downcase)
        gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}?s=#{size}" 
        image_tag(gravatar_url, alt: user.name, class: "gravatar")
    end
end

用户注册表单

app/views/users/new.html.erb

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<% provide(:title, 'Sign up') %> 
<h1>Sign up</h1>
<div class="row">
    <div class="col-md-6 col-md-offset-3">
        <%= form_with(model: @user, local: true) do |f| %> <%= render 'shared/error_messages' %>
            <%= f.label :name %>
            <%= f.text_field :name, class: 'form-control' %>
            <%= f.label :email %>
            <%= f.email_field :email, class: 'form-control' %>
            <%= f.label :password %>
            <%= f.password_field :password, class: 'form-control' %>
            <%= f.label :password_confirmation, "Confirmation" %>
            <%= f.password_field :password_confirmation, class: 'form-control' %>
            <%= f.submit "Create my account", class: "btn btn-primary" %> <% end %>
    </div>
</div>

app/assets/stylesheets/custom.scss

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/* forms */

input, textarea, select, .uneditable-input { 
    border: 1px solid #bbb;
    width: 100%;
    margin-bottom: 15px;
    @include box_sizing; 
}
    input {
    height: auto !important;
}

注意，在上面的代码中，渲染的局部视图名为 ‘shared/error_messages’，这里用到了 Rails 的一个约定:如 果局部视图要在多个控制器中使用(10.1.1 节)，则把它存放在专门的 shared/ 目录中。

app/views/shared/_error_messages.html.erb

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<% if @user.errors.any? %> 
    <div id="error_explanation">
        <div class="alert alert-danger">
            The form contains <%= pluralize(@user.errors.count, "error") %>.
        </div>
        <ul>
            <% @user.errors.full_messages.each do |msg| %>
            <li><%= msg %></li> 
            <% end %>
        </ul>
    </div>
<% end %>
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/* forms */
.
.
.
#error_explanation {
    color: red; 
    ul {
        color: red;
        margin: 0 0 30px 0;
    }
}

.field_with_errors { 
    @extend .has-error; 
    .form-control {
        color: $state-danger-text; 
    }
}
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class UsersController < ApplicationController .
    .
    .
    def create
        @user = User.new(user_params) 
        if @user.save
            # 处理注册成功的情况 else
            redirect_to @user
        end
    end
    
    private
    
        def user_params
            params.require(:user).permit(:name, :email, :password,
            :password_confirmation)
        end 
end

闪现消息

app/controllers/users_controller.rb

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class UsersController < ApplicationController .
    .
    .
    def create
        @user = User.new(user_params) 
        if @user.save
            flash[:success] = "Welcome to the Sample App!"
            # 处理注册成功的情况 else
            redirect_to @user
        end
    end
    
    private
    
        def user_params
            params.require(:user).permit(:name, :email, :password,
            :password_confirmation)
        end 
end

app/views/layouts/application.html.erb

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<!DOCTYPE html>
<html>
    .
    .
    .
    <body>
        <%= render 'layouts/header' %> 
        <div class="container">
            <% flash.each do |message_type, message| %>
                <div class="alert alert-<%= message_type %>"><%= message %></div>
            <% end %>
            <%= yield %>
            <%= render 'layouts/footer' %>
            <%= debug(params) if Rails.env.development? %>
        </div>
            .
            .
            .
    </body>
</html>

专业部署方案

在生产环境中使用 SSL

config/environments/production.rb

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Rails.application.configure do .
    .
    .
    # Force all access to the app over SSL, use Strict-Transport-Security,
    # and use secure cookies. 
    config.force_ssl = true
    .
    .
end

生产环境中的 Web 服务器

config/puma.rb

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# Puma configuration file.
max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 } min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count } threads min_threads_count, max_threads_count
port ENV.fetch("PORT") { 3000 }
environment ENV.fetch("RAILS_ENV") { ENV['RACK_ENV'] || "development" } pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
workers ENV.fetch("WEB_CONCURRENCY") { 2 }
preload_app!
plugin :tmp_restart

最后，我们要新建一个 Procfile 文件，告诉 Heroku 在生产环境运行一个 Puma 进程。这个文件的内容如代 码清单 7.36 所示。Procfile 文件和 Gemfile 文件一样，应该放在应用的根目录中。

./Procfile

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web: bundle exec puma -C config/puma.rb

配置生产数据库

config/database.yml

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default: &default
      adapter: sqlite3
      pool: 5
      timeout: 5000

development:
    <<: *default
    database: db/development.sqlite3
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production. 

test:
    <<: *default
    database: db/test.sqlite3

production:
    adapter: postgresql
    encoding: unicode
    # For details on connection pooling, see Rails configuration guide # https://guides.rubyonrails.org/configuring.html#database-pooling pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
    database: sample_app_production
    username: sample_app
    password: <%= ENV['SAMPLE_APP_DATABASE_PASSWORD'] %>
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