Ruby on rails 轨道&x2013；嵌套资源-我的编辑和删除方法检索错误的ID

感谢您抽出时间回顾此问题

我有一个名为templates的嵌套资源，它属于类别。我在类别显示页面中显示了模板创建、编辑和删除操作。但是，当试图编辑或删除同一模板时，我可以通过其ID（通常是在类别下创建的第一个模板）检索该模板，而不会产生任何问题

代码

config/routes.rb

  resources :categories do
    resources :templates

app/models/template.rb

class Template < ApplicationRecord
  belongs_to :category
  validates :title, presence: true
  validates :content, presence: true
end

app/views/categories/show.html.erb

  <% @templates.each do |template| %>
    <div class= "template-grid">
      <div class= "template-index-card">
        <h1><%= template.title%></h1>
        <p><%= template.content %></p>
        <div class= "template-options">
          <%= link_to image_tag("edit.png", class: "icon"), edit_category_template_path([@category, @template])%>
          <%= link_to image_tag("bin.png", class: "icon"), category_template_path([@category, @template]), method: :delete,
            data: { confirm: 'Are you sure?' }%>

---

谢谢

如何传递参数，而不是作为数组传递

<%= link_to image_tag("edit.png", class: "icon"), edit_category_template_path(category_id: @category.id, id: @template.id)%>
<%= link_to image_tag("bin.png", class: "icon"), category_template_path(category_id: @category.id, id: @template.id), method: :delete,
...

这个问题最终是由太多同名变量造成的。为了解决此问题，我必须进行以下更改：

1-在app/views/categories/show.html.erb上，我删除了@form模板，因为我在迭代中，我还传递了参数，而不是建议的数组

  <% @templates.each do |template| %>
    <div class= "template-grid">
      <div class= "template-index-card">
        <h1><%= template.title%></h1>
        <p><%= template.content %></p>
        <div class= "template-options">
          <%= link_to image_tag("edit.png", class: "icon"), edit_category_template_path(@category, template)%>
          <%= link_to image_tag("bin.png", class: "icon"), category_template_path(@category, template), method: :delete,
            data: { confirm: 'Are you sure?' }%>




我在app/controllers/categories\u controller.rb的show方法中将@template变量的名称更新为@template，这样我就可以使用@template在template\u控制器的edit方法上传递id
由于链接位于categories/show视图中，因此show us categories\u controllerI添加了categories\u Controllers。谢谢谢谢我以前试过，但不幸的是，它不起作用。我得到以下错误：没有路由匹配{:action=>“edit”，：category_id=>“1”，：controller=>“templates”，：id=>nil}，缺少必需的键：[:id]
<%= simple_form_for([@category, @template]) do |f| %>
  <div class="form-inputs">
      <%= f.input :title %>
      <%= f.input :content %>
  </div>
  <div class= "form-btn-flex">
      <%= f.button :submit, "Update Template", class:"btn-mdpm-forms"%>
    <% end %>

class TemplatesController < ApplicationController

  def new
    @template = Template.new
  end

  def create
    @template = Template.new(template_params)
    @template.user_id = current_user.id
    @template.category = Category.find(params[:category_id])
    if @template.save
      redirect_to category_path(@template.category_id)
    else
      render :show
    end
  end

  def index
    @templates = Template.all
  end

  def show
    @template = Template.find(params[:id])
  end

  def edit
    @category = Category.find(params[:category_id])
    @template = @category.templates.find_by(params[:id])
  end

  def update
    @category = Category.find_by(params[:category_id])
    @template = @category.templates.find_by(params[:id])
    if @template.update(template_params)
      redirect_to category_path(@category)
    else
      render :edit
    end
  end

  def destroy
    @template = Template.find_by(params[:id])
    @template.destroy
    redirect_to category_path(@template.category_id)
  end

  private

  def template_params
    params.require(:template).permit(:title, :content)
  end
end

class CategoriesController < ApplicationController
  before_action :set_category, only: [:edit, :update]

  def new
    @category = Category.new
  end

  def create
    @category = Category.new(category_params)
    @category.user = current_user
    if @category.save
      redirect_to categories_path
    else
      render :index
    end
  end

  def index
    @category = Category.new
    @categories = Category.all
  end

  def show
    @template = Template.new
    @category = Category.find(params[:id])
    @templates = @category.templates
  end

  def edit
    @category = Category.find(params[:id])
  end

  def update
    if @category.update(category_params)
      redirect_to category_path(@category)
    else
      render :edit
    end
  end

  def destroy
    @category = Category.find(params[:id])
    @category.destroy
    redirect_to categories_path
  end

  private

  def category_params
    params.require(:category).permit(:name)
  end

  def set_category
    @category = Category.find(params[:id])
  end
end

      category_templates GET    /categories/:category_id/templates(.:format)                                             templates#index
                          POST   /categories/:category_id/templates(.:format)                                             templates#create
    new_category_template GET    /categories/:category_id/templates/new(.:format)                                         templates#new
   edit_category_template GET    /categories/:category_id/templates/:id/edit(.:format)                                    templates#edit
        category_template GET    /categories/:category_id/templates/:id(.:format)                                         templates#show
                          PATCH  /categories/:category_id/templates/:id(.:format)                                         templates#update
                          PUT    /categories/:category_id/templates/:id(.:format)                                         templates#update
                          DELETE /categories/:category_id/templates/:id(.:format)                                         templates#destroy
               categories GET    /categories(.:format)                                                                    categories#index
                          POST   /categories(.:format)                                                                    categories#create
             new_category GET    /categories/new(.:format)                                                                categories#new
            edit_category GET    /categories/:id/edit(.:format)                                                           categories#edit
                 category GET    /categories/:id(.:format)                                                                categories#show
                          PATCH  /categories/:id(.:format)                                                                categories#update
                          PUT    /categories/:id(.:format)                                                                categories#update
                          DELETE /categories/:id(.:format)                                                                categories#destroy

<%= link_to image_tag("edit.png", class: "icon"), edit_category_template_path(category_id: @category.id, id: @template.id)%>
<%= link_to image_tag("bin.png", class: "icon"), category_template_path(category_id: @category.id, id: @template.id), method: :delete,
...

  <% @templates.each do |template| %>
    <div class= "template-grid">
      <div class= "template-index-card">
        <h1><%= template.title%></h1>
        <p><%= template.content %></p>
        <div class= "template-options">
          <%= link_to image_tag("edit.png", class: "icon"), edit_category_template_path(@category, template)%>
          <%= link_to image_tag("bin.png", class: "icon"), category_template_path(@category, template), method: :delete,
            data: { confirm: 'Are you sure?' }%>