Ruby-on-rails Rails 查看助手文件中的助手
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Rails view helpers in helper file
提问by Bob
I'm probably missing something obvious here but here's what I'm trying to do.
我可能在这里遗漏了一些明显的东西，但这就是我想要做的。
From the view, I'm calling a custom helper function
从视图上看，我正在调用自定义帮助函数
<div>
<%=display_services%>
</div>
In the helper file with the display_services function
在带有 display_services 函数的帮助文件中
def display_services
html = "<div>"
form_for @user do |f|
f.text_field ...
end
html << "</div>"
end
I find that form_for method and f.text_field output directly to HTML stream without the div wrapper that I like. What is the proper syntax to output all the HTML in display_services? Thanks in advance for your help.
我发现 form_for 方法和 f.text_field 直接输出到 HTML 流，而没有我喜欢的 div 包装器。在 display_services 中输出所有 HTML 的正确语法是什么？在此先感谢您的帮助。
回答by 0livier
IMHO, you should not have HTML hardcoded in Ruby code. Instead, prefer partials views.
恕我直言，你不应该在 Ruby 代码中硬编码 HTML。相反，更喜欢局部视图。
module ServicesHelper
def display_services(user)
render :partial => "shared/display_services", :locals => {:user => user}
end
end
回答by xijo
Just a suggestion for style, I like doing something like this:
只是对风格的建议，我喜欢做这样的事情：
In your view:
在您看来：
<% display_services %>
Please note that the =isn't needed any more.
The helper then uses concat()to append something to your page and the putting-long-strings-together thing is obsolete too:
请注意，=不再需要 。然后，帮助程序concat()用于将某些内容附加到您的页面，并且将长字符串放在一起的内容也已过时：
def display_services
concat("<div>")
form_for @user do |f|
f.text_field ...
end
concat("</div>")
end
Is it nessaccary to put the <div>tag into the helper. If you need a helper for embedding something into a block you could use some yield-magic as well:
将<div>标签放入助手中是否必要。如果您需要帮助将某些内容嵌入到块中，您也可以使用一些 yield-magic：
def block_helper
concat("<div>")
yield
concat("</div>")
end
And use it like this in your view - of course with helpers too:
并在您看来像这样使用它 - 当然也与助手一起使用：
<% block_helper do %>
cool block<br/>
<% display_services %>
<% end %>
回答by Bob
As it turns out, I had to do something like this
事实证明，我不得不做这样的事情
def display_services
html = "<div>"
html << (form_for @user do |f|
f.text_field ...
end)
html << "</div>"
end
Note the () wrapped around the form block. If someone has a better solution, let me know.
注意包裹在表单块周围的 ()。如果有人有更好的解决方案，请告诉我。
