PDF上傳Ruby on Rails服務器 - DB Postgres

Question

你好，我正在嘗試使用Ruby Rails將PDF文檔存儲在PostgreSQL數據庫中。 目前我的代碼看起來是這樣的：

DB文件：

 '$20151126021922_create_pdf_creates.rb' 

class CreatePdfCreates < ActiveRecord::Migration 
    def change 
    create_table :pdf_creates do |t| 
     t.binary :pdfload 

     t.timestamps null: false 
    end 
    end 
end 

型號：

'$pdf_create.rb' 

class PdfCreate < ActiveRecord::Base  

end 

控制器：

'$pdf_creates_controller.rb' 

class PdfCreatesController < ApplicationController 
    before_action :set_pdf_create, only: [:show, :edit, :update, :destroy] 

    # GET /pdf_creates 
    # GET /pdf_creates.json 
    def index 
    @pdf_creates = PdfCreate.all 
    end 

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

    # GET /pdf_creates/new 
    def new 
    @pdf_create = PdfCreate.new 
    end 

    # GET /pdf_creates/1/edit 
    def edit 
    end 

    # POST /pdf_creates 
    # POST /pdf_creates.json 
    def newpdf 
    @pdf_create = PdfCreate.new(pdf_create_params) 
    respond_to do |format| 
     if @pdf_create.save 
     format.html { redirect_to @pdf_create, notice: 'Pdf create was successfully created.' } 
     format.json { render :show, status: :created, location: @pdf_create } 
     else 
     format.html { render :new } 
     format.json { render json: @pdf_create.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    def create 
    @pdf_create = PdfCreate.new(pdf_create_params) 
    #data = File.read(Rails.root + "tmp/consent(1).pdf") 
    #Document.create pdfload: data 

    respond_to do |format| 
     if @pdf_create.save 
     format.html { redirect_to @pdf_create, notice: 'Pdf create was successfully created.' } 
     format.json { render :show, status: :created, location: @pdf_create } 
     format.pdf { send_data @pdf_create.render} 

     else 
      format.html { render :new } 
     # format.json { render json: @pdf_create.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

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

    # DELETE /pdf_creates/1 
    # DELETE /pdf_creates/1.json 
    def destroy 
    @pdf_create.destroy 
    respond_to do |format| 
     format.html { redirect_to pdf_creates_url, notice: 'Pdf create was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

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

    # Never trust parameters from the scary internet, only allow the white list through. 
    def pdf_create_params 
     params.require(:pdf_create).permit(:pdfload) 
    end 
end 

我送PDF表單，結果是返回的是我：

{「id」：5，「pdfload」：null，「created_at」：「2015-11-26T03：24：37.457Z」，「updated_at」：「2015-11-26T03：24：37.457Z」}

有什麼不對？ Tks

Answer 1

您正在發送整個新創建的記錄，而不是存儲在其中的PDF數據。

嘗試修改此：

format.pdf { send_data @pdf_create.render} 

這樣：

format.pdf { send_data @pdf_create.pdfload}