我希望用户能够将 Word文档和 PDF 文件上传到我的rails应用程序。我的应用程序类似于Pinterest应用程序,用户可以创建 Pins ,其中附加图片后跟描述(使用 Paperclip 将图像附加到 Pin < /强>)。
这是我的 Pins 模型:
class Pin < ActiveRecord::Base
belongs_to :user
has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
validates_attachment :image, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
validates :image, presence: true
end
我的 Pins 控制器:
class PinsController < ApplicationController
before_action :set_pin, only: [:show, :edit, :update, :destroy]
before_action :correct_user, only: [:edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@pins = Pin.all.order("created_at DESC").paginate(:page => params[:page], :per_page => 15)
end
def show
end
def new
@pin = current_user.pins.build
end
def edit
end
def create
@pin = current_user.pins.build(pin_params)
if @pin.save
redirect_to @pin, notice: 'Pin was successfully created.'
else
render action: 'new'
end
end
def update
if @pin.update(pin_params)
redirect_to @pin, notice: 'Pin was successfully updated.'
else
render action: 'edit'
end
end
def destroy
@pin.destroy
redirect_to pins_url
end
private
def set_pin
@pin = Pin.find(params[:id])
end
def correct_user
@pin = current_user.pins.find_by(id: params[:id] )
redirect_to pins_path, notice: "Not authorized to edit this Pin" if @pin.nil?
end
def pin_params
params.require(:pin).permit(:description, :image)
end
end
我想知道我是否只需要为 Pin 模型中的 Word文档和 PDF 文件创建另一种has_attached_file
方法然后为用户创建一个视图以上传文件。
答案 0 :(得分:34)
这取决于......
如果要附加图像 AND 文档,则需要为文档创建另一个回形针属性。在您的模型上:
has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
validates_attachment :image, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
has_attached_file :document
validates_attachment :document, :content_type => { :content_type => %w(application/pdf application/msword application/vnd.openxmlformats-officedocument.wordprocessingml.document) }
如果您想附加图片或文件,您可以执行以下操作:
has_attached_file :document
validates_attachment :document, :content_type => {:content_type => %w(image/jpeg image/jpg image/png application/pdf application/msword application/vnd.openxmlformats-officedocument.wordprocessingml.document)}
如果选择第一个选项,则视图中需要两个文件输入,第二个只有一个。这不是对或错。这取决于你想做什么。