Rails - 如何在控制器中包含 mail_to 助手 [英] Rails - How to include the mail_to helper inside of a controller

问题描述

在我的控制器中，我需要格式化一个 json 对象，这就是为什么我需要包含几个助手.

in my controller I need to format a json object, which is why I need to include several helpers.

到目前为止，我的控制器中有以下内容:

So far I have the following in my controller:

  include ApplicationHelper
  include ActionView::Helpers::TextHelper
  include ActionView::Helpers::TagHelper

这对 simple_format 很有用，问题是当 comment.content 有一个电子邮件地址时，rails 尝试做一个中断的 mailto 链接，在日志中显示以下错误:NoMethodError (undefined method `mail_to' for...."

This works great for simple_format, problem is when the comment.content has a email address, rails trys to do a mailto link which breaks, showing the following error in the logs: "NoMethodError (undefined method `mail_to' for...."

关于如何添加它的任何想法?我尝试添加 include ActionView::Helpers::UrlHelper 但这没有用.

Any ideas on how to add it in? I tried adding include ActionView::Helpers::UrlHelper but that did not work.

谢谢

推荐答案

在执行查看"任务(例如生成链接)时，您可以在控制器中使用 view_context.这样做的好处是您不必在控制器中包含视图助手.

You can use view_context in your controller when doing 'view' tasks like generating links. The good thing about it is you don't have to include the view helpers in your controller.

例如在您的控制器中，您可以创建一个变量，该变量将是一个带有 link_to 的 html 链接.

e.g. in your controller you can create a variable which will be a html link with link_to.

link = view_context.link_to("link", your_awesome_path(@awesome))

我尚未对此进行测试，但希望您能够在控制器中执行此操作:

I have not tested this but you should hopefully be able to do this in your controller:

email_link = view_context.mail_to(@user.email)

RyanB 在 paper_trail railscast 中使用 view_context:255-undo-with-paper-trail

RyanB uses view_context in the paper_trail railscast: 255-undo-with-paper-trail

不确定这是否能解决您的问题，因为不确定您对 JSON 助手等做了什么，但它可能会有所帮助.

Not sure if this will solve your problem, because not sure what your doing with the JSON helpers etc. but it may help.

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