#..Rails 4 的未定义方法“model_name_question”答案

【问题标题】：undefined method `model_name_question' for #..Rails 4#..Rails 4 的未定义方法“model_name_question”
【发布时间】：2014-01-13 21:15:47
【问题描述】：

提交表单后出现此错误：（在索引页面中）

<%= simple_form_for(@quiz, html: {class: 'form-vertical' }) do |f| %>
            <%= render 'shared/error_messages_question' %>
            <%= f.input_field :content, :rows => 3, :style => "width:80%", :placeholder => "enter your question."  %>
            <%= f.button :submit %>
<% end %>

我有question 模型：

class Question < ActiveRecord::Base
    validates :question, presence: true

    belongs_to :category
    belongs_to :questioner
end

和问题控制器：

class QuestionsController < ApplicationController
  def index
    @quiz = Question.new
    @questioner = Questioner.new
  end

  def new
    @quiz = Question.new(quiz_params)
  end

  def show
    @quiz = Question.find(params[:id])
  end

  def edit
    @quiz = find(params[:id])
    raise "Question Not edited!" unless @quiz
  end

  def create
    @quiz = Question.new(quiz_params)

    if @quiz.save
      flash[:success] = 'You have successfully posted the questions!'
      redirect_to questions_path
    else
      flash[:error] = "Please review the problems below."
      # render 'new'
      redirect_to questions_path
    end
  end

  private

    def quiz_params
      params.require(:question).permit(:content, :answered, :questioner_id, :category_id)
    end
end

可能是什么问题？在 Rails 服务器中，我有这个：

Completed 500 Internal Server Error in 5ms

    NoMethodError - undefined method `question' for #<Question:0x0000000433dfc0>:
      activemodel (4.0.2) lib/active_model/attribute_methods.rb:439:in `method_missing'

【问题讨论】：

标签： ruby-on-rails ruby ruby-on-rails-4 strong-parameters

【解决方案1】：

问题可能与此验证行有关

validates :question, presence: true

假设您的 Question 模型具有 :question 属性。换句话说，确保questions 数据库表中有正确的question 数据库列。

如果不是这种情况，请相应地修复表格或验证。

【讨论】：