[在我的Rails应用程序中,我正在尝试创建一个预订表单,外部各方(parks
)可以指示其客户为各个公园进行预订。预订表单适用于子域book
https://book.myapp.com/en/parks/:park_id/park_availability
目标
我想用myapp.com
的网站替换我的域(park
),以便得到
https://book.parkapp.com/en/park_availability
不幸的是我收到错误消息创建公园后
NameError (uninitialized constant #<Class:0x0000563d7bf62250>::Heroku):
使用现有公园时
{park.website}'s server IP address could not be found.
尝试使用概述的方法
Park
具有website
列。在routes.rb
中,我尝试设置约束并将其应用于park_availability
操作。 Park
模型中,我试图将域(Park.website
)添加到我的Heroku应用程序中。Park controller
动作之前,我尝试在@park
中找到park_availability
。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
要解决有问题的错误,您可以尝试将类名写为::Heroku
,这将使ruby在正确的范围内查找它。
但是Heroku legacy api已经是disabled,因此您应该使用其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'], ...)
也可以检查域是否存在,您可以使用domain.info
api方法,而不是获取不需要的所有域。
请记住,回调不是进行任何外部调用的最佳位置:如果api调用由于某种原因而失败(临时网络问题,api中断,服务器重启等)-整个事务将被回滚,项目不会保存,您可以松散数据。更好的方法是在此排队一个后台作业,该作业将在以后处理域,并在需要时可以重试,等等。