如何在acts_as_taggable_on中生成标签云？
我无法调试为什么会出现错误：
class VendorsController < ApplicationController
def tag_cloud
@tags = Vendor.tag_counts_on(:tags)
end
我将此类设置为可标记：
class Vendor < ActiveRecord::Base
acts_as_taggable_on :tags, :competitors
我包含 TagsHelper：
module VendorsHelper
include TagsHelper
end
这是在我的视图中：
<% tag_cloud(@tags, %w(css1 css2 css3 css4)) do |tag, css_class| %>
<%= link_to tag.name, { :action => :tag, :id => tag.name }, :class => css_class %>
<% end %>
这是我收到的错误：
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.empty?
供应商的每个实例都至少有一个标签。
I can't debug why I am getting an error:
class VendorsController < ApplicationController
def tag_cloud
@tags = Vendor.tag_counts_on(:tags)
end
I set this class as Taggable:
class Vendor < ActiveRecord::Base
acts_as_taggable_on :tags, :competitors
I include the TagsHelper:
module VendorsHelper
include TagsHelper
end
This is in my View:
<% tag_cloud(@tags, %w(css1 css2 css3 css4)) do |tag, css_class| %>
<%= link_to tag.name, { :action => :tag, :id => tag.name }, :class => css_class %>
<% end %>
This is the error that I get:
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.empty?
Each instance of Vendor has at least one Tag.
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评论（1）
明白了，我需要在
索引控制器中添加：@tags = Vendor.tag_counts_on(:tags)。Got it, I needed to add:
@tags = Vendor.tag_counts_on(:tags)in theindex controller.