Rails nomethod错误

Question

我是Rails的新手，正在尝试创建一个接受用户请求的应用程序。然而，当我尝试创建新请求时，这就是正在发生的事情。

请求控制器：

class RequestsController < ApplicationController
  before_action :set_request, only: [:show, :edit, :update, :destroy]

  # GET /requests
  # GET /requests.json
  def index
    @requests = Request.all
  end

  # GET /requests/1
  # GET /requests/1.json
  def show

  end

  # GET /requests/new
  def new
    @request = Request.new

  end

  # GET /requests/1/edit
  def edit
  end

  # POST /requests
  # POST /requests.json
  def create
    @request = Request.new(request_params)

    respond_to do |format|
      if @request.save # <-------------- The problem is here
        format.html { redirect_to @request, notice: 'Request was successfully created.' }
        format.json { render :show, status: :created, location: @request }
      else
        format.html { render :new }
        format.json { render json: @request.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /requests/1
  # PATCH/PUT /requests/1.json
  def update
    respond_to do |format|
      if @request.update(request_params)
        format.html { redirect_to @request, notice: 'Request was successfully updated.' }
        format.json { render :show, status: :ok, location: @request }
      else
        format.html { render :edit }
        format.json { render json: @request.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /requests/1
  # DELETE /requests/1.json
  def destroy
    @request.destroy
    respond_to do |format|
      format.html { redirect_to requests_url, notice: 'Request was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_request
      @request = Request.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def request_params
      params.require(:request).permit(:user_id, :description, :created)
    end
end

错误说没有＆＃34;创建＆＃34;请求控制器中的方法，但是说这是create方法的方法。我认为问题在于我的观点并未将描述作为参数传递，我不知道该怎么做/为什么它还没有。

_form.html.erb（由edit.html.erb呈现）：

%= form_for(@request) do |f| %>
  <% if @request.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@request.errors.count, "error") %> prohibited this request from being saved:</h2>

      <ul>
      <% @request.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <center>
  <div class="field">
    <%= f.label 'Describe your favor' %><br>
    <%= f.text_area :description %>
  </div>

  <div class="actions">
    <%= f.submit %>
  </div>
  </center>
<% end %>

如果有人可以告诉我如何将描述对象作为参数传递给我的create方法并让方法不崩溃。

以下是错误日志：

NoMethodError (undefined method `Request' for #<Request:0x007f9fbd8992e8>):
  app/controllers/requests_controller.rb:32:in `block in create'
  app/controllers/requests_controller.rb:31:in `create'


  Rendered /usr/local/rvm/gems/ruby-2.2.2/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/_source.erb (6.9ms)
  Rendered /usr/local/rvm/gems/ruby-2.2.2/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (2.8ms)
  Rendered /usr/local/rvm/gems/ruby-2.2.2/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (0.9ms)
  Rendered /usr/local/rvm/gems/ruby-2.2.2/gems/actionpack-4.2.5/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (29.4ms)

Answer 1

使用Request（或Response）作为模型的名称不是一个好主意，因为你最终会隐藏request object。这是Rails控制器的核心部分。

由于它会在MVC和Web开发中与核心概念发生冲突，因此它也会使你的代码变得非常混乱。

使用thesaurus并为您的模型找到另一个名称。