[英]ruby on rails: (eval):1: syntax error, unexpected $undefined
I'm getting the following syntax error: 我收到以下语法错误:
(eval):1: syntax error, unexpected $undefined
$#<MenuBuilder:0x007fccee84e7f8> = #<MENUBUILDER:0X007FCCEE84E7F8>
^
This is code execution: 这是代码执行:
#main-menu
= menu do |m|
= m.submenu "Products" do
= m.item "Products", Product
module BuildersHelper
def menu(options = {}, &block)
MenuBuilder.new(self).root(options, &block)
end
end
class MenuBuilder
attr_accessor :template
def initialize(template)
@template = template
end
def root(options, &block)
options[:class] = "jd_menu jd_menu_slate ui-corner-all"
content_tag :ul, capture(self, &block), options
end
def item(title, url, options = {})
content_tag :li, options do
url = ajax_route(url) unless String === url
url = dash_path + url if url.starts_with?("#")
link_to title, url
end
end
def submenu(title, options = {}, &block)
content_tag :li do
content_tag(:h6, title.t) +
content_tag(:ul, capture(self, &block), :class => "ui-corner-
all")
end
end
end
It fails on the capture() call in the root method: 它在root方法中的capture()调用上失败:
content_tag :ul, capture(self, &block), options
self refers to the instance of MenuBuilder and I am positive that a block is passed as the other parameter. self指的是MenuBuilder的实例,我很肯定将一个块作为另一个参数传递。 If I throw a puts statement in an if block_given?
如果我在if block_given中抛出puts语句? it will execute, but it wont get passed that content_tag line above.
它会执行,但不会通过上面的content_tag行。
The issue looks like it's in your use of the capture
helper method . 问题似乎出在您使用
capture
助手方法时 。
That method accepts a block of view code and assigns it to a variable that can be used elsewhere in your view. 该方法接受一个视图代码块,并将其分配给可以在视图中其他地方使用的变量。
Here's more info: http://api.rubyonrails.org/classes/ActionView/Helpers/CaptureHelper.html#method-i-capture 这是更多信息: http : //api.rubyonrails.org/classes/ActionView/Helpers/CaptureHelper.html#method-i-capture
Are you sure you're actually passing a block into the code the executes the capture? 您确定要传递代码到执行捕获的代码中吗?
You might consider something like this: 您可能会考虑这样的事情:
content_tag :li do
if block_given?
content_tag(:h6, title.t) +
content_tag(:ul, capture(self, &block), :class => "ui-corner-all")
else
content_tag(:h6, title.t) # whatever is appropriate if there's no block passed
end
end
Okay, I just had this problem, and I think I figured out how to fix it. 好的,我只是遇到了这个问题,我想我已经找到了解决方法。 The problem is most likely a bug introduced into ActiveRecord where they're overriding Kernel.capture.
问题很可能是ActiveRecord中引入的一个错误,该错误覆盖了Kernel.capture。 The fix, I've found, is to use the helper module's capture instead of the class-level capture.
我发现,解决方法是使用帮助程序模块的捕获而不是类级捕获。 So in your case, where you're calling
content_tag :ul, capture(self, &block), options
, try calling content_tag :ul, @template.capture(self, &block), options
instead so you use the helper module's capture method instead of the shoddy one from AR. 因此,在您的情况下,您在调用
content_tag :ul, capture(self, &block), options
,请尝试调用content_tag :ul, @template.capture(self, &block), options
以便改用helper模块的capture方法来自AR的劣质产品之一。
Check out these github issues for some more info. 查看这些 github 问题以获取更多信息。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.