Question

我最近一直试图通过在栏杆上使用 ruby on rails 来学习红宝石。一切都很好，直到我进入教程的现场，没有关于如何使用paperclip安装 s3 的指导，教程是用于dropbox的。我迷失了，并且已经错误了2天。我已经研究了很多这个问题，但由于我的知识有限，我很难理解它。我知道我的问题是回形针/ s3问题。到目前为止，我拥有所有宝石。有人可以和我一起工作并帮助指导我解决我的问题。这是我的listings_controller.fb文件。第66行给出了这个错误。

未初始化的常量ListingsController :: Listing。

class ListingsController < ApplicationController
  before_action :set_listing, only: [:show, :edit, :update, :destroy]

  # GET /listings
  # GET /listings.json
  def index
    @listings = Listing.all
  end

  # GET /listings/1
  # GET /listings/1.json
  def show
  end

  # GET /listings/new
  def new
    @listing = Listing.new
  end

  # GET /listings/1/edit
  def edit
  end

  # POST /listings
  # POST /listings.json
  def create
    @listing = Listing.new(listing_params)

    respond_to do |format|
      if @listing.save
        format.html { redirect_to @listing, notice: 'Listing was successfully created.' }
        format.json { render :show, status: :created, location: @listing }
      else
        format.html { render :new }
        format.json { render json: @listing.errors, status: :unprocessable_entity }
      end
    end
  end

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

  # DELETE /listings/1
  # DELETE /listings/1.json
  def destroy
    @listing.destroy
    respond_to do |format|
      format.html { redirect_to listings_url, notice: 'Listing was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

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

    # Never trust parameters from the scary internet, only allow the white list through.
    def listing_params
      params.require(:listing).permit(:name, :description, :price, :image)
    end
end
______________Terminal_______________-
Started GET "/listings/1" for 127.0.0.1 at 2017-02-09 21:36:39 +0900
Processing by ListingsController#show as HTML
  Parameters: {"id"=>"1"}
Completed 500 Internal Server Error in 2ms (ActiveRecord: 0.0ms)

NameError（未初始化的常量ListingsController :: Listing）：

app / controllers / listings_controller.rb：67：在`set_listing＆＃39;渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb   在救援/布局内渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_source.html.erb   渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_source.html.erb   （5.2ms）渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb呈现   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb(2.3ms）渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb   渲染   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb   （1.3ms）呈现   /Users/chrisdionne/.rvm/gems/ruby-2.3.3/gems/actionpack-5.0.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb   在救援/布局（161.7ms）内

红宝石新手。使用baserails。解决问题

0 个答案: