Question

我正在使用带有PostGre数据库的Rails 4.2.3。我有一个有几个成员对象的对象。在我的app / models / my_object.rb文件中，我有

class MyObject < ActiveRecord::Base
  belongs_to :user
  has_many :my_object_times
  has_one :address
  attr_accessor :hour, :minute, :second

  validates_numericality_of :overall_rank, :age_rank, :gender_rank

  accepts_nested_attributes_for :my_object_times
end

然后在我看来，我的形式是......

  <%= f.fields_for :my_object_times do |rt| %>
  <div class="field">
    <%= rt.label :overall_rank %><br>
    <%= rt.text_field :overall_rank %>
  </div>

但提交表单时出现此错误

NoMethodError (undefined method `overall_rank' for #<MyObject:0x007fd66df43968>):
  app/controllers/my_objects_controller.rb:10:in `block in create'
  app/controllers/my_objects_controller.rb:9:in `create'

我不明白为什么我收到这个错误。下面是我的app / controllers / my_objects_controller.rb文件

class MyObjectsController < ApplicationController

  def create
    @my_object = MyObject.new(my_object_params)
    @current_user = User.find(session["user_id"])
    @my_object.user = @current_user
    @date = Date.strptime(my_object_params[:day], "%m/%d/%Y")
    @my_object.day = @date
    respond_to do |format|
      if @my_object.save
        flash[:notice] = 'Saved successfully' 
        format.html { redirect_to controller: "users", action: "index", notice: 'Saved successfully.' }
        format.js { render js: "window.location='/users'" }
      else
        format.html { render action: "index" }
        format.js   { render json: @my_object.errors, status: :unprocessable_entity }
      end
    end
  end

感谢任何帮助， - 戴夫

Answer 1

虽然您的my_object_params私有方法没有代码，但您可能会错过overall_rank吗？

Answer 2

您没有指定视图所针对的操作，但根据您的控制器代码，我假设您正在尝试创建新对象。换句话说，html代码用于新操作。

生成表单时，您在对象内部调用my_object_times，但它仍然不存在。

<%= f.fields_for :my_object_times do |rt| %>
  <div class="field">
    <%= rt.label :overall_rank %><br>
    <%= rt.text_field :overall_rank %>
  </div>
<% end %>

尝试保存子对象的字段时，NoMethodError未定义的方法

2 个答案: