如何将 ActionMailer default_url_options 的 :host 动态设置为请求的主机名? [英] How to set the ActionMailer default_url_options's :host dynamically to the request's hostname?

问题描述

我正在尝试设置 :host for action mailer 默认 url 选项.

I am trying to set the :host for action mailer default url options.

我在所有环境文件中都设置了以下内容

I have the below set in all the environment files

config.action_mailer.default_url_options = {
  :host => "localhost"
}

我想通过提供请求主机使其更具动态性.

I want to make it more dynamic by providing the request host.

当我尝试通过

config.action_mailer.default_url_options = {
  :host => request.domain
}

或

config.action_mailer.default_url_options = {
  :host => request.env["SERVER_NAME"]
}

它抛出错误...无法识别请求"对象

It throws error... doesn't recognize "request" object

有什么方法可以将其设置为请求主机，而不是通过硬编码...?

is there any way I can set this to the request host, not by hardcoding...?

推荐答案

还可以通过在 default_url_options 哈希中设置 :host 选项来设置将在所有邮件程序中使用的默认主机

It is also possible to set a default host that will be used in all mailers by setting the :host option in the default_url_options hash

在 application_controller.rb 中添加:

class ApplicationController < ActionController::Base
  def default_url_options
    { host: request.host_with_port }
  end
end

来源:https://edgeguides.rubyonrails.org/action_controller_overview.html#默认网址选项

或者，您可以在从控制器调用邮件程序函数时传递request

Alternatively, you can pass the request when calling the mailer function from the controller

class UserMailer < ActionMailer::Base

  def welcome_email(user, request)
    @user = user
    @url  = user_url(@user, host: request.host_with_port ) # do this for each link
    mail(:to => user.email, :subject => "Welcome to My Awesome Site")
  end
end

来源:https://guides.rubyonrails.org/action_mailer_basics.html#generating-urls-with-named-routes

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