link_to :action =>“创建"将索引而不是“创建" [英] link_to :action => 'create' going to index rather than 'create'

问题描述

我正在构建一个相当简单的食谱应用程序来学习 RoR，我试图允许用户通过单击链接而不是通过表单来保存食谱，因此我通过一个连接 user_recipe 控制器的创建"功能链接到.

不幸的是，由于某种原因，link_to 调用的是索引函数而不是创建函数.

我已经把link_to写成

<前><%= "保存这个食谱", :action => 'create', :recipe_id => @recipe %>

此链接位于 user_recipes/index.html.erb 上，正在调用同一控制器的创建"函数.如果我包含 :controller 似乎没有什么区别.

控制器看起来像这样

<前>定义索引@recipe = params[:recipe_id]@user_recipes = UserRecipes.all # 更改以查找当数据库中有多个用户时response_to do |格式|format.html #index.html.erbformat.xml { 渲染:xml => @recipes }结尾结尾定义创建@user_recipe = UserRecipe.new@user_recipe.recipe_id = params[:recipe_id]@user_recipe.user_id = current_userresponse_to do |格式|如果@menu_recipe.saveformat.html { redirect_to(r, :notice => '菜单创建成功.') }format.xml { render :xml => @menu, :status => :created, :location => @menu }别的format.html { 渲染:动作 =>新"}format.xml { 渲染 :xml => @menu.errors, :status => :unprocessable_entity }结尾结尾

解决方案

在标准 REST 方案中，索引操作和创建操作都具有相同的 url (/recipes)，唯一的不同在于index 使用 GET 访问，create 使用 POST 访问.所以 link_to :action =>:create 将简单地生成一个指向 /recipes 的链接，这将导致浏览器在点击时对 /recipes 执行 GET 请求，从而调用索引操作.

要调用创建操作，请使用 link_to {:action =>;:create}, :method =>:post，明确告诉 link_to 您想要发布请求，或者使用带有提交按钮而不是链接的表单.

I am building a fairly simple recipe app to learn RoR, and I am attempting to allow a user to save a recipe by clicking a link rather than through a form, so I am connecting the user_recipe controllers 'create' function through a link_to.

Unfortunately, for some reason the link_to is calling the index function rather than the create.

I've written the link_to as

<%= "save this recipe", :action => 'create', :recipe_id => @recipe %>

this link is on the user_recipes/index.html.erb and is calling the 'create' function of the same controller. It doesn't seem to make a difference if I include the :controller or not.

The controllers look like this

def index
    @recipe = params[:recipe_id]
    @user_recipes = UserRecipes.all # change to find when more than one user in db
    respond_to do |format|
         format.html #index.html.erb
         format.xml { render :xml => @recipes }
    end
end

def create
    @user_recipe = UserRecipe.new
    @user_recipe.recipe_id = params[:recipe_id]
    @user_recipe.user_id = current_user
    respond_to do |format|
      if @menu_recipe.save
        format.html { redirect_to(r, :notice => 'Menu was successfully created.') }
        format.xml  { render :xml => @menu, :status => :created, :location => @menu }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @menu.errors, :status => :unprocessable_entity }
      end
    end

解决方案

In the standard REST scheme the index action and the create action both have the same url (/recipes) and only differ in that index is accessed using GET and create is accessed using POST. So link_to :action => :create will simply generate a link to /recipes which will cause the browser to perform a GET request for /recipes when clicked and thus invoke the index action.

To invoke the create action use link_to {:action => :create}, :method => :post, telling link_to explicitly that you want a post request, or use a form with a submit button rather than a link.

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