[英]Rails - Simple Forms - undefined method `model_name' for nil:NilClass
[英]Rails simple form undefined method `model_name' for nil:NilClass
我想创建一个简单的表单来对食谱中发布的食谱进行新的评论。 我在食谱展示页面上显示了审阅表,但它总是给我同样的错误:
nil:NilClass的未定义方法“ model_name”
当我不在app / views / recipes / show.html.erb呈现部分新的审阅表单时,而是创建了文件app / views / reviews / new.html.erb ,只有该表单起作用。 当我尝试在“显示食谱”页面上呈现该表单时,我不理解该表单为何不起作用。
这是我的代码:
简单形式:
<%= simple_form_for(@review, url: recipe_reviews_path(@recipe)) do |f| %>
<%= f.error_notification %>
<%= f.input :content %>
<%= f.input :rating %>
<%= f.button :submit, class: "btn btn-success" %>
<% end %>
评论控制器:
class ReviewsController < ApplicationController
def new
@recipe = recipe.find(params[:recipe_id])
@review = Review.new(review_params)
end
def create
@recipe = recipe.find(params[:recipe_id])
@review = Review.new(review_params)
@review.recipe = @recipe
if @review.save
redirect_to recipe_path(@recipe)
else
render 'recipe/show'
end
end
private
def review_params
params.require(:review).permit(:content, :rating)
end
end
配方控制器:
class RecipesController < ApplicationController
skip_before_action :authenticate_user!
def index
@recipes = Recipe.all
end
def show
@recipe = Recipe.find(params[:id])
@user = User.find(@recipe.user_id)
@full_name = @recipe.user.first_name + " " + @recipe.user.last_name
end
end
配方显示页面:
<div class="review">
<%= render 'review/new' %>
<% @recipe.reviews.each do |review| %>
<%= review.content %>
<%= review.rating %>
<% end %>
</div>
路线:
resources :recipes, only: [:index, :show] do
resources :reviews, only: [:create]
end
楷模:
class Recipe < ActiveRecord::Base
belongs_to :user
has_many :ingredients, dependent: :destroy
has_many :reviews, dependent: :destroy
validates :name, :summary, :course, :kitchen, :photo, :description, presence: true
validates :summary, length: { maximum: 30 }
mount_uploader :photo, PhotoUploader
accepts_nested_attributes_for :ingredients, reject_if: :all_blank, allow_destroy: true
end
模型审查:
class Review < ActiveRecord::Base
belongs_to :recipe
validates :content, length: { minimum: 20 }
validates :rating, presence: true
validates_numericality_of :rating, :greater_than_or_equal_to => 0, :less_than_or_equal_to => 5
validates :content, presence: true
end
谁能看到这个问题? 先感谢您!
只需在RecipesController的show动作中创建Review Modal的新实例-:
@review =评论。新
就这样,我会工作。 :)
您的RecipesController中是否有新方法? 因为您在simpleform视图中使用了@recipe。 你需要
def new
@recipe = recipe.find(params[:recipe_id])
@review = Review.new(review_params)
end
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