如何显示来自 rails 帮助程序内容标签的组织数据

Question

How to show organized data from rails helper content tag?

如下是我的辅助方法，我想显示按 parent 分组的所有类别名称，即 ul li 如果可以，请看下面的方法我认为您将了解该代码以及我想要什么。该方法输出数据但不使用 ul li

辅助方法

def category
    parent_categories = Category.select(:id, :name, :parent).group_by(&:parent)
    parent_categories.each do |parent, childs|
        content_tag(:div) do 
            content_tag(:h1, parent)
        end +
        content_tag(:ul) do 
            childs.each do |child|
                content_tag(:li, child.name)
            end
        end
    end
end

<%= category %>的输出

{"Technology"=>[#<Category id: 1, name: "Programming", parent: "Technology">, #<Category id: 3, name: "Ruby on Rails", parent: "Technology">, #<Category id: 9, name: "Full Time", parent: "Technology">, #<Category id: 14, name: "Business Opportunities", parent: "Technology">, #<Category id: 15, name: "Contract & Freelance", parent: "Technology">, #<Category id: 18, name: "Engineering", parent: "Technology">, #<Category id: 25, name: "IT", parent: "Technology">], 

"Education"=>[#<Category id: 5, name: "Industry", parent: "Education">, #<Category id: 6, name: "Education", parent: "Education">, #<Category id: 7, name: "Education & Industry", parent: "Education">, #<Category id: 16, name: "Customer Service", parent: "Education">, #<Category id: 17, name: "Diversity Opportunities", parent: "Education">],

"Other"=>[#<Category id: 8, name: "Part Time", parent: "Other">, #<Category id: 12, name: "Admin & Clerical", parent: "Other">]}

schema.rb

create_table "categories", force: :cascade do |t|
  t.string "name"
  t.string "parent"
end

那是我完成的作品。

例子之后就是我想要的样子

技术 (Parent)

编程
Ruby 在 Rails
Ruby
ReactJS

教育 (Parent)

办公室
老师
物理

其他 (Parent)

临床
健康
等...

请帮我完成这项工作。

谢谢

Answer 1

您在帮助程序中使用了 ERB，但它不是 html.erb 文件，因此您无法获取要创建的标签。为什么不直接使用您生成的哈希，然后我认为您正在寻找的是这样的东西：

辅助方法：

def category
  Category.select(:id, :name, :parent).group_by(&:parent)
end

然后在您的视图文件 (.html.erb) 中执行如下操作：

  <% category.each do |cat, list| %>
    <div class="category">
      <b> <%= cat %> </b>
      <ul>
        <% list.each do |item| %>
          <li> <%= item.name %> </li>
        <% end %>
      </ul>
    </div>
    <br>
  <% end %>

好的，你可以根据文档使用concat方法按照你建议的方式进行：

def category
    parent_categories = Category.select(:id, :name, :parent).group_by(&:parent)
    parent_categories.each do |parent, childs|
        concat content_tag(:div) do 
           concat content_tag(:h1, parent)
        end 
       concat content_tag(:ul) do 
            childs.each do |child|
               concat content_tag(:li, child.name)
            end
        end
    end
end

如何显示来自 rails 帮助程序内容标签的组织数据

How to show organized data from rails helper content tag

ruby-on-rails

ruby

helper