我想在重定向到用户配置文件后在图片上方显示图片标题。我上传了一张带有标题的图片，但它只显示带有标签和用户的图片。我尝试在下面的show.html.haml中添加代码，但标题根本不显示。我做错了什么？
图片_控制器.rb

class PhotosController < ApplicationController
  def create
    @user = User.find(params[:user_id])
    if params[:photo][:title] == ""
      flash[:alert] = "Please enter an image title"
      redirect_to :back
    elsif params[:photo][:image] == nil
      flash[:alert] = "Please upload a photo"
      redirect_to :back
    else
      @photo = Photo.create(photo_params)
      @photo.user_id = @user.id
      @photo.save
      flash[:notice] = "Successfully uploaded a photo"
      redirect_to user_path(@user)
    end
  end

  def new
    @user = User.find(params[:user_id])
    @photo = Photo.create()
  end

  private
  def photo_params
    params.require(:photo).permit(:image, :title)
  end
end

photo.rb

class Photo<ActiveRecord::Base
  belongs_to :user
  has_many :tags
  
  has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }
  validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/
  validates :title, :presence => true
end

20150318211456_照片_表格. rb

class PhotosTable < ActiveRecord::Migration
  def change
    create_table :photos do |photons|
      photons.column :user_id, :integer
      photons.column :title, :string
      photons.timestamps
    end
  end
end

new.html.haml

%h1 Add a Photo
= form_for Photo.new(), :url => user_photos_path, :html => {:multipart => true} do |form|
    = form.label :title
    = form.text_field :title
    %br
    %br
    = form.file_field :image
    %br
    %br
    %br
    = form.submit 'Upload', class: "btn btn-primary btn-lg"

show.html.haml

= link_to @user_photos_path do
    = @photo.title
    = image_tag @photo.image.url
    = image_tag @photo.image.url(:thumb)