浏览器在Locals#show中显示以下错误:
NilClass的未定义方法'model_name':Class
51: <%= form_for(@food) do |f| %>
52: <%= render 'shared/error_messages', object: f.object %>
53: <div class="field">
54: <%= f.label :nome %>
这是我的locals_controller.rb(show动作)
def show
@local = Local.find(params[:id])
@foods = @local.foods.paginate(page: params[:page])
respond_to do |format|
format.html # show.html.erb
format.json { render json: @local }
end
端
这里的foods_controller.rb(创建动作)
def create
@food = @local.foods.build(params[:food])
if @food.save
flash[:success] = "Food created!"
redirect_to '/locals'
else
flash[:error] = "Error on creating food"
render '/locals'
end
end
食物模型和本地模型与:has_many和belongs_to
相关问题是什么?谢谢
答案 0 :(得分:8)
然后将您的视图代码更改为:
<%= form_for :food, :url => {:action => :create} do |f| %>
答案 1 :(得分:2)
通过添加以下代码进行检查(我假设您的模型是本地的)
@food = Local.new
在你的新动作中
答案 2 :(得分:0)
如果您在编辑时发生这种情况,但在创建时它可以正常工作
您必须添加之前的操作并设置食物
before_action :set_food, only: [:show, :edit, :update, :destroy]
答案 3 :(得分:0)
您可以使用以下任何代码:
<%= form_for :food, :url => {:controller => :food, :action => :create} do |f| %>
<%= form_for :food, url: food_create_path do |f| %>
<%= form_for Food.new , url: food_create_path do |f| %>