同一页面上的 2 个表单，在 Sinatra 中使用 Pony 发送，相同的电子邮件地址

Question

我正在使用 Pony.mail 在 Sinatra 中发送邮件，我现在有两种形式，一种只发送电子邮件地址用于订阅时事通讯，第二种形式是联系表，两者都在执行相同的操作.

我想要实现的是，如果订阅字段已完成，则仅发送这些参数，或者如果联系表已完成并发送，则发送这些参数

这是我到目前为止想出的，但是得到未定义的方法 nil

 post '/' do
  require 'pony'
 Pony.mail(
 :from => params[:name] || params[:subscribe],
 :to => 'myemailaddress',
 :subject => params[:name] + " has contacted you via the Website" ||  params[:subscribe] + " has subscribed to the newsletter",
 :body => params[:email] + params[:comment],
 :via => :smtp,
 :via_options => {
 :address              => 'smtp.gmail.com',
 :port                 => '587',
 :enable_starttls_auto => true,
 :user_name            => 'myemailaddress',
 :password             => 'mypassword',
 :authentication       => :plain, 
 :domain               => "localhost.localdomain" 
 })
  redirect '/success' 
 end

这是否可能，或者每个表格都必须单独处理？

谢谢

Answer 1

我会经历几个阶段来重构这段代码。

1。提取正在变化的东西（并使它们更 Rubyish）

post '/' do
  require 'pony'

  from = params[:name] || params[:subscribe]
  subject = "#{params[:name]} has contacted you via the Website" ||
            "#{params[:subscribe]} has subscribed to the newsletter"
  body = "#{params[:email]}#{params[:comment]}"

  Pony.mail(
    :from => from,
    :to => 'myemailaddress',
    :subject => subject,
    :body => body,
    :via => :smtp,
    :via_options => {
    :address              => 'smtp.gmail.com',
    :port                 => '587',
    :enable_starttls_auto => true,
    :user_name            => 'myemailaddress',
    :password             => 'mypassword',
    :authentication       => :plain, 
    :domain               => "localhost.localdomain" 
  })
  redirect '/success' 
end

2。明确你的意图

在这种情况下，代码中有两个分支。

post '/' do
  require 'pony'

  if params[:name] # contact form
    from = params[:name]
    subject = "#{params[:name]} has contacted you via the Website"
  else # subscription form
    from = params[:subscribe]
    subject = "#{params[:subscribe]} has subscribed to the newsletter"
  end

  body = "#{params[:email]}#{params[:comment]}"

  Pony.mail(
    :from => from,
    :to => 'myemailaddress',
    :subject => subject,
    :body => body,
    :via => :smtp,
    :via_options => {
    :address              => 'smtp.gmail.com',
    :port                 => '587',
    :enable_starttls_auto => true,
    :user_name            => 'myemailaddress',
    :password             => 'mypassword',
    :authentication       => :plain, 
    :domain               => "localhost.localdomain" 
  })
  redirect '/success' 
end

（我不太喜欢在条件分支中设置本地变量，但为了清楚起见我们将忽略这一点。我可能会在条件之前创建一个散列，并使用已经完成的键，然后将其填充到分支，但 YMMV。）

3。从不变的内容中提取不变的内容。

Sinatra 有一个 configure 块来处理这种事情。

require 'pony'

configure :development do
  set :email_options, {
    :via => :smtp,
    :via_options => {
    :address              => 'smtp.gmail.com',
    :port                 => '587',
    :enable_starttls_auto => true,
    :user_name            => 'myemailaddress',
    :password             => 'mypassword',
    :authentication       => :plain, 
    :domain               => "localhost.localdomain" 
  }
end

Pony.options = settings.email_options

请注意，我已添加 :development，因为您可能希望为生产设置不同的设置。

现在你的路线更干净，更容易调试：

post '/' do

  if params[:name] # contact form
    from = params[:name]
    subject = "#{params[:name]} has contacted you via the Website"
  else # subscription form
    from = params[:subscribe]
    subject = "#{params[:subscribe]} has subscribed to the newsletter"
  end

  body = "#{params[:email]}#{params[:comment]}"

  Pony.mail
    :from => from,
    :to => 'myemailaddress',
    :subject => subject,
    :body => body,

  redirect '/success' 
end

我的最后一个提示是将尽可能多的 Pony 选项放入 ENV 变量中，这不仅可以使密码等内容不受源代码控制，还可以让您更轻松地更改设置。也许将它们放在 Rakefile 中并为不同的上下文加载不同的环境等。

---

要使用环境变量，我执行以下操作：

# Rakefile

# in this method set up some env vars
def basic_environment
  # I load them in from a YAML file that is *not* in source control
  # but you could just specify them here
  # e.g. ENV["EMAIL_A"] = "me@example.com"
end

namespace :app do

  desc "Set up the environment locally"
  task :environment do
    warn "Entering :app:environment"
    basic_environment()
  end

  desc "Run the app locally"
  task :run_local => "app:environment" do
    exec "bin/rackup config.ru -p 4630"
  end
end

# from the command line, I'd run
`bin/rake app:run_local`

# in the Sinatra app file
configure :production do
    # these are actual settings I use for a Heroku app using Sendgrid
    set "email_options", {      
      :from => ENV["EMAIL_FROM"],
      :via => :smtp,
      :via_options => {
        :address => 'smtp.sendgrid.net',
        :port => '587',
        :domain => 'heroku.com',
        :user_name => ENV['SENDGRID_USERNAME'],
        :password => ENV['SENDGRID_PASSWORD'],
        :authentication => :plain,
        :enable_starttls_auto => true
      },
    }
end

# then a block with slightly different settings for development
configure :development do
  # local settings…
    set "email_options", {
      :via => :smtp,
      :via_options => {
        :address              => 'smtp.gmail.com',
        :port                 => '587',
        :enable_starttls_auto => true,
        :user_name            => ENV["EMAIL_A"],
        :password             => ENV["EMAIL_P"], 
        :authentication       => :plain,
        :domain               => "localhost.localdomain"
      }
    }
end

我通常将这些设置中的大部分保存在本地 YAML 文件中以进行开发，但将这些设置直接添加到生产服务器。有很多方法可以解决这个问题，YMMV。