缺少此请求格式和变体的模板

Question

我是Ruby on Rails的新手,我正在努力深入了解MVC的工作原理.

我做了以下事情:

rails new bubblesman 
rails generate controller bubble

在我的bubble控制器中,我创建了一个方法如下:

def available
  puts "YEP!!!!!!"
end

我在路线文件中添加了以下内容:

'welcome' => 'bubble#available'

我导航到http:// localhost:3000/welcome 我得到以下错误:

ActionController::UnknownFormat (BubbleController#available is missing a template for this request format and variant.

request.formats: ["text/html"]
request.variant: []

NOTE! For XHR/Ajax or API requests, this action would normally respond with 204 No Content: an empty white screen. Since you're loading it in a web browser, we assume that you expected to actually render a template, not… nothing, so we're showing an error to be extra-clear. If you expect 204 No Content, carry on. That's what you'll get from an XHR or API request. Give it a shot.):

我也不明白的是,如果我把它放在我的助手控制器而不是我的主控制器中,它一切正常.

Answer 1

您需要available.html.erb在views/bubble/目录中创建该文件.当路线将您带到该操作时,它还会导航到该视图,因此如果您放置:

<h2>YEP!!!!</h2>

作为该文件中的唯一一行,它应该在网页上返回给您.

在将来,您可以使用rails g scaffold bubbles,这将为您创建大部分文件(MVC)和路由.