如何连接两个控制器

Question

我有这两个控制器关于故事和类别，他们单独工作。现在，我想在添加新闻时添加选择已创建的类别。我应该如何连接它们以及如何使用select标签在new.html.erb中显示所有类别？

class StoriesController < ApplicationController 
    def index 
    @stories = Story.all 
    end 

    def show 
    @story = Story.find(params[:id]) 
    end 

    def new 
    @story = Story.new 
    end 

    def create 
    @story = Story.new(params[:story]) 

    if @story.save 
     redirect_to stories_path, :notice => "Your story was saved" 
    else 
     render "new" 
    end 
    end 

    def edit 
    @story = Story.find(params[:id]) 
    end 

    def update 
    @story = Story.find(params[:id]) 

    if @story.update_attributes(params[:story]) 
     redirect_to stories_path, :notice => "Your story has been updated" 
    else 
     render "edit" 
    end 
    end 

    def destroy 
    @story = Story.find(params[:id]) 
    @story.destroy 
    redirect_to stories_path, :notice => "Your story has been deleted" 
    end 
end 

class CategoriesController < ApplicationController 
    def index 
    @categories = Category.all 
    end 

    def new 
    @category = Category.new 
    end 

    def create 
    @category = Category.new(params[:category]) 

    if @category.save 
     redirect_to categories_path, :notice => "Your category was saved" 
    else 
     render "new" 
    end 
    end 

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

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

    if @category.update_attributes(params[:category]) 
     redirect_to categories_path, :notice => "Your category has been updated" 
    else 
     render "edit" 
    end 
    end 

    def destroy 
    @category = Category.find(params[:id]) 
    @category.destroy 
    redirect_to categories_path, :notice => "Your category has been deleted" 
    end 
end 

Answer 1

你可以尝试用：

# app/controllers/stories_controller.rb 
def new 
    @categories = Category.all 
    @story = Story.new 
end 

# app/views/stories/_form.html.erb 
<%= form_for @story do |f| %> 
    #.... 
    <%= f.collection_select :category_id, @categories, :id, :title %> 

Answer 2

这不是你需要将控制器连接在一起。你真的只需要StoriesController来查询类别列表，并将其放置到类变量中，以便视图可以利用它。

class StoriesController < ApplicationController 
    ... 
    def new 
    @categories = Category.all 
    @story = Story.new 
    end 

Answer 3

嘿控制器ü可以访问类的标题。创建一个分类标题数组而不是分类对象数组。

# app/controllers/stories_controller.rb 
    def new 
    @categories = Category.all.map(&:title) 
    @story = Story.new 
    end