将自定义模板添加到 mail_form gem

Question

我正在尝试按照Mail_form gem 的文档添加自定义电子邮件模板。文档指出：

要自定义使用的电子邮件模板，请在 app/views/mail_form 中创建一个名为 contact.erb 的文件。查看此 repo 中的 lib/mail_form/views/mail_form/contact.erb 以了解默认模板的工作原理。

另外，我发现了这个 issue in the repo 并做了同样的事情：

我在初始化程序中创建了一个 mail_for.rb 文件，并将MailForm::Notifier.template_root = File.join(Rails.root, "app", "views") 添加到该文件中。

我在视图中创建了一个 mail_form 目录并添加了一个contact.erb 文件并将默认模板复制到其中。

但是，当我重新启动服务器时，出现以下错误：

启动 WEBrick => Rails 4.2.5 应用程序开始在http://localhost:3000 上开发 => 运行rails server -h 以获得更多启动选项 => Ctrl-C 关闭服务器退出 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/actionmailer-4.2.5/lib/action_mailer/base.rb:569:in method_missing': undefined methodtemplate_root=' 为 MailForm::Notifier:Class (NoMethodError) 来自 /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config/initializers/mail_form.rb:1:in <top (required)>' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:inload' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in block in load' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:inload_dependency' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in load' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/engine.rb:652:in block in load_config_initializer' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.5/lib/active_support/notifications.rb:166:in instrument' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/engine.rb:651:in load_config_initializer' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/engine.rb:616:in block (2 levels) in <class:Engine>' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/engine.rb:615:in each' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/engine.rb:615:in block in <class:Engine>' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:30:in instance_exec' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:30:in run' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:55:in block in run_initializers' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:226:in block in tsort_each' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:348:in block（2 个级别）在 each_strongly_connected_component' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:420:in block (2 levels) in each_strongly_connected_component_from' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:429:in each_strongly_connected_component_from' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:419:in block in each_strongly_connected_component_from' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:44:in each' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:44:in tsort_each_child' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:413:in call' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:413:in each_strongly_connected_component_from' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:347:in block in each_strongly_connected_component' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in each' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in call' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:345:in each_strongly_connected_component' from /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:224:in tsort_each' 来自 /Users/Tony/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/tsort.rb:203:in tsort_each' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/initializable.rb:54:in run_initializers' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/application.rb:352:in initialize!' from /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config/environment.rb:5:in ' 来自 /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config.ru:3:in require' from /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config.ru:3:in block in '来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in instance_eval' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:55:in initialize' 来自 /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config.ru:in new' from /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/config.ru:in '来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in eval' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:49:in new_from_string' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/builder.rb:40:in parse_file' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:299:in build_app_and_options_from_config' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:208:in app' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/server.rb:61:in app' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/rack-1.6.4/lib/rack/server.rb:336:in wrapped_app' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/server.rb:139:in log_to_stdout' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/server.rb:78:in start' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in block in server' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in tap' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in server' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in run_command!' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands.rb:17:in ' 来自 /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/bin/rails:9:in require' from /Users/Tony/Desktop/Corner_Stone/vagrant/src/cornerstone/bin/rails:9:in ' 来自 /Users/Tony/.rvm/gems/ruby-2.2.1/gems/spring-1.6.4/lib/spring/client/rails.rb:28:in load' from /Users/Tony/.rvm/gems/ruby-2.2.1/gems/spring-1.6.4/lib/spring/client/rails.rb:28:in call' 来自 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当我删除 mail_form.rb 文件中的代码时一切正常，但我想根据自己的喜好自定义邮件通知。错误说未定义方法template_root=' for MailForm::Notifier:Class，但我不知道它是什么意思。我还在学习，所以这个错误有点过头了，任何帮助将不胜感激！谢谢！

Answer 1

我也遇到了同样的问题。令人沮丧的是，他们的文档缺少有关自定义模板的信息。太模糊了我需要感谢我的一位同事找到了一个快速的解决方案。他在 Ruby 方面比我熟练得多。

他是这样做的：

1. 删除/删除初始化程序中的mail_form.rb 文件。我的同事认为 gem 已经默认这样做了，在测试了这个理论之后，我猜他是对的。所以你不需要这个文件。
2. 在项目树中展开 External Libraries 文件夹并找到 mail_form 文件夹。我正在使用 RubyMine，所以我不知道您的软件是否会显示这一点。告诉我是否没有，我会更新我的答案并粘贴初始模板代码。
3. 在mail_form 文件夹中，展开并访问以下文件lib>mail_form>views>mail_form>contact.erb。这个.erb 文件是gem 使用的初始模板。
4. 将上面访问的文件的内容复制/粘贴到您之前在views 目录中的mail_form 目录中创建的contact.erb 文件中。这将成为您的自定义模板。
5. 完成此操作后，您现在可以完全控制电子邮件模板，因此可以根据自己的喜好修改代码。