轨道：未定义的局部变量或方法"view_context"，用于#<ActionView：：Base：0x007f8091a1cb88>

Question

我有一个叫做FeaturesHelper的助手，它有一些特性的数据:

feature_info = [
{features:
[
{
description: "This is a #{view_context.link_to "link!", "https://www.example.com", target: :_blank, class: "pink-link"}", 
}
]
}, ...]

然后我有一个使用feature_info的部分:

<% feature_info.each do |info|%>    
<% info[:features].each do |feature| %>
<%= feature[:description].html_safe %>                               
<% end %>
<% end %>    

然后在视图中渲染局部:

<%= render partial: "partial_name" %>

这会导致堆栈跟踪指向no myFeaturesHelper:

的错误。

未定义的局部变量或方法' view_context'为#ActionView::Base:0x007f80a6cdcf20

Answer 1

view_context在这里不可见，您需要将其作为参数传递。

module FeaturesHelper
def self.feature_info(view_context)
[
{
features: [
{
description: "This is a #{view_context.link_to 'link!', 'https://www.example.com', target: :_blank, class: 'pink-link'}",
}
]
}, # ...
]
end
end

关于你的观点:

<% feature_info = FeaturesHelper.feature_info(view_context) %>
<% feature_info.each do |info| %>
<% info[:features].each do |feature| %>
<%= feature[:description].html_safe %>
<% end %>
<% end %>