约束失败时从路由重定向 [英] Redirecting from routes when the constraints fail

问题描述

当路由约束失败时，我想重定向到其他网址

I want to redirect to a different url when the route constraint fails

Route.rb

match '/ u'=>'user＃signin'，：constraints => BlacklistDomain

match '/u' => 'user#signin', :constraints => BlacklistDomain

blacklist_domain.rb

blacklist_domain.rb

class BlacklistDomain
    BANNED_DOMAINS = ['domain1.com', 'domain2.com']

    def matches?(request)
        if BANNED_DOMAINS.include?(request.host)
            ## I WANT TO REDIRECT HERE WHEN THE CONDITION FAILS
            else
                    return true     
           end

    end
end

推荐答案

由于Rails路由是按顺序执行的，因此您可以通过以下方式模仿条件登录：

Because Rails routes are executed sequentially, you can mimic conditional login in the following manner:

# config/routes.rb
match '/u' => 'controller#action', :constraints => BlacklistDomain.new
match '/u' => 'user#signin'

第一行检查是否满足约束条件（例如，是否该请求是从列入黑名单的域发出的）。如果满足约束条件，则将请求路由到 controller＃action （当然，将其替换）。

The first line checks whether the conditions of the constraint are met (i.e., if the request is emanating from a blacklisted domain). If the constraint is satisfied, the request is routed to controller#action (replace accordingly, of course).

如果满足约束失败的条件（即，请求未列入黑名单），则请求将被路由到 user＃signing 。

Should the conditions of the constraint fail to be met (i.e., the request is not blacklisted), the request will be routed to user#signing.

由于在您的路线中有效处理了此条件逻辑，因此可以简化约束代码：

Because this conditional logic is effectively handled in your routes, your constraints code can be simplified:

# blacklist_domain.rb
class BlacklistDomain
  BANNED_DOMAINS = ['domain1.com', 'domain2.com']

  def matches?(request)
    if BANNED_DOMAINS.include?(request.host)
      return true     
    end
  end
end

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