Managing multiple domains in a rails application error: "NameError (uninitialized constant #<Class:0x0000563d7bf62250>::Heroku):"

Question

在我的 rails 应用程序中，我正在尝试创建一个预订表格，外部各方（parks）可以将他们的客户指向相应公园进行预订。预订表格适用于子域 book

的 url/route

https://book.myapp.com/en/parks/:park_id/park_availability

目标

我想用 park 的网站替换我的域 (myapp.com)，这样我得到

https://book.parkapp.com/en/park_availability

很遗憾，我收到了错误消息创世园

NameError (uninitialized constant #<Class:0x0000563d7bf62250>::Heroku):

使用现有公园时

{park.website}'s server IP address could not be found.

概述尝试的方法

Park 有一个 website 列。在 routes.rb 中，我尝试设置约束并将它们应用于 park_availability 操作。
在 Park 模型中，一旦公园被保存，我尝试将域 (Park.website) 添加到我的 Heroku 应用程序。
在我的 Park controller 中，我尝试在 park_availability 操作之前找到 @park。

代码

routes.rb

class CustomDomainConstraint
  # Implement the .matches? method and pass in the request object
  def self.matches? request
    matching_site?(request)
  end

  def self.matching_site? request
    # handle the case of the user's domain being either www. or a root domain with one query
    if request.subdomain == 'www'
      req = request.host[4..-1]
    else
      req = request.host
    end

    # first test if there exists a Site with a domain which matches the request,
    # if not, check the subdomain. If none are found, the the 'match' will not match anything
    Park.where(:website => req).any?
  end
end

Rails.application.routes.draw do
  resources :parks do
     match ':website/park_availability' =>  'parks#park_availability', on: :member, :constraints => CustomDomainConstraint, via: :all
end
end

park.rb

class Park < ApplicationRecord
  after_save do |park|
  heroku_environments = %w(production staging)
  if park.website && (heroku_environments.include? Rails.env)
    added = false
    heroku = Heroku::API.new(api_key: ENV['HEROKU_API_KEY'])
    heroku.get_domains(ENV['APP_NAME']).data[:body].each do |domain|
      added = true if domain['domain'] == park.website
    end

    unless added
      heroku.post_domain(ENV['APP_NAME'], park.website)
      heroku.post_domain(ENV['APP_NAME'], "www.#{park.website}")
    end
  end
end

parks_controller.rb

class ParksController < ApplicationController
before_action :find_park, only:[:park_availability]

def park_availability
  #working code...
end

private
def find_park
     # generalise away the potential www. or root variants of the domain name
    if request.subdomain == 'www'
      req = request.host[4..-1]
    else
      req = request.host
    end

    # test if there exists a Park with the requested domain,
    @park = Park.find_by(website: req)

    # if a matching site wasn't found, redirect the user to the www.<website>
    redirect_to :back
  end

end

Answer 1

要绕过问题中的错误，您可以尝试将类名写成 ::Heroku，这将使 ruby 在正确的范围内查找它。

但是 Heroku legacy api has been disabled, so you should use their new platform-api:

heroku = PlatformAPI.connect(ENV['HEROKU_API_KEY']) # note that you may also have to use a new key
domains = heroku.domain.list(ENV['APP_NAME'])
...
heroku.domain.create(ENV['APP_NAME'], ...)

还可以使用 domain.info api 方法来检查域是否存在，而不是获取所有不需要的域。

请记住，回调不是进行任何外部调用的最佳位置：如果 api 调用由于某种原因失败（临时网络问题、api 中断、服务器重启等） - 整个交易将被回滚，项目将不会被保存，你可以松散数据。更好的方法是在那里排队后台作业，稍后将处理域，如果需要可以重试等等。

Managing multiple domains in a rails application error: "NameError (uninitialized constant #<Class:0x0000563d7bf62250>::Heroku):"

Managing multiple domains in a rails application error: "NameError (uninitialized constant #<Class:0x0000563d7bf62250>::Heroku):"

ruby-on-rails

heroku

cross-domain

heroku-api