Rails 4 - 回形針不顯示上傳的圖像

Question

我正在學習導軌，目前我正在跟隨Mattan Griffel的'One Mont Rails'。我花了很多時間尋找這個答案，並嘗試了一切，但似乎沒有任何工作。我使用回形針寶石來上傳圖片，但上傳後，圖片不顯示。唯一顯示的是缺失的圖像圖標。有人可以請幫忙。非常感謝。

這裏是我的GitHub庫的鏈接：github.com/robertguss/omrails

銷控制器：pins_controller.rb

class PinsController < ApplicationController 
    respond_to :html, :xml, :json 
    before_filter :authenticate_user!, except: [:index] 
    before_action :set_pin, only: [:show, :edit, :update, :destroy] 

    def index 
    @pins = Pin.all 
    respond_with(@pins) 
    end 

    def show 
    respond_with(@pin) 
    end 

    def new 
    @pin = current_user.pins.new 
    respond_with(@pin) 
    end 

    def edit 
    @pin = current_user.pins.find(params[:id]) 
    end 

    def create 
    @pin = current_user.pins.new(pin_params) 
    @pin.save 
    respond_with(@pin) 
    flash[:success] = "Pin was created successfully!" 
    end 

    def update 
    @pin = current_user.pins.find(params[:id]) 
    @pin.update(pin_params) 
    respond_with(@pin) 
    flash[:success] = "Pin was updated successfully!" 
    end 

    def destroy 
    @pin = current_user.pins.find(params[:id]) 
    @pin.destroy 
    respond_with(@pin) 
    flash[:alert] = "Pin was deleted!" 
    end 

    private 
    def set_pin 
     @pin = Pin.find(params[:id]) 
    end 

    def pin_params 
     params.require(:pin).permit(:description) 
    end 
end 

銷型號= pin.rb

class Pin < ActiveRecord::Base 

    validates :user_id, presence: true 
    validates :description, presence: true 
    has_attached_file :image, 
      :path => ":rails_root/public/system/:attachment/:id/:style/:filename", 
     :url => "/system/:attachment/:id/:style/:filename" 
    validates_attachment :image, content_type: { content_type: ['image/jpeg', 'image/jpg', 'image/png' 'image/gif'] }, 
                   size: { less_than: 5.megabytes } 

    belongs_to :user 

end 

Answer 1

在您的def pin_params上，您應該將權限添加到圖像文件;所以它會是：

def pin_params 
    params.require(:pin).permit(:description, :image) 
end