Ruby on Rails - 未定义的局部变量或方法（强参数）

Question

我的应用程序正在使用Rails 4.1.8并且我使用Simple Form gem。 我在private下的强参数定义中得到了未定义的局部变量或方法错误，我不明白其原因。

_form.haml.html

= simple_form_for @recipe, html: { multipart: true } do |f|
    - if @recipe.errors.any?
        #errors
            %h2
                = pluralize(@recipe.errors.count, "error") 
                prohibited this recipe from being saved
            %ul
                - @recipe.errors.full_messages.each do |msg|
                    %li= msg

    = f.input :title
    = f.input :serving
    = f.input :prep
    = f.input :cook


    = f.button :submit

控制器

class RecipesController < ApplicationController

 def create
    @recipe = Recipe.new(recipe_params)
    if @recipe.save 
      redirect_to @recipe, notice: "Successfully created"
    else
      render 'new'
    end

    private

    def recipe_params
      params.require(:recipe).permit(:title, :serving, :prep, :cook)
    end

  end
end

提交按钮带我去路由http://localhost:3000/recipes而不是 显示http://localhost:3000/recipes/1

Answer 1

您没有正确关闭create方法。它应该是：

class RecipesController < ApplicationController
  def create
    @recipe = Recipe.new(recipe_params)
    if @recipe.save 
      redirect_to @recipe, notice: "Successfully created"
    else
      render 'new'
    end
  end

  private

  def recipe_params
    params.require(:recipe).permit(:title, :serving, :prep, :cook)
  end
end