缺少要链接的主机！请为 Rails 4 提供 :host 参数 [英] Missing host to link to! Please provide the :host parameter, for Rails 4

问题描述

缺少要链接的主机！请提供 :host 参数，设置default_url_options[:host]，或者设置:only_path 为true

Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true

我当时随机收到这个错误，一般重启服务器可以解决一段时间的问题，然后它又出现了.我已经添加了config.action_mailer.default_url_options = "localhost:3000"，在 development 和 test.rb 文件中.

I randomly get this error at time, generally restarting the server fixes the issue for a while, and then it shows up again. I have added config.action_mailer.default_url_options = "localhost:3000", in the development and test.rb files.

另外，我使用了 include Rails.application.routes.url_helpers在一个模块中访问路由，我读到这可能是我收到这些错误的原因，但删除它会使我无法访问路由.
该模块用于数据表 gem.

Also, I have used include Rails.application.routes.url_helpers in one module to get access to the routes, I read this could be the reason I get these errors but removing it will leave me with no access to the routes.
The module is for the datatables gem.

推荐答案

对于 Rails 5，使用:

For Rails 5, use:

Rails.application.routes.default_url_options[:host] = "XXX"

您可以将其放在 config/environments/ 文件(或任何其他初始化程序)中，或例如config/routes.rb 的开头.

You can put this in a config/environments/ file (or any other initializer), or e.g. at the beginning of config/routes.rb.

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