【画像を表示したいのですができません　〜Active Strageでの画像実装〜】

投稿画面のビュー

  <div class="container">
    <h3>投稿を作成</h3>
    <%="#{current_user.nickname}"%>
    <%= form_with(model: @photo, url: photos_path, local: true) do |form| %>
      <div class="field">
        <%= form.text_field :title, placeholder: "Title" %>
     </div>

      <div class="field">
      <%= form.date_field :date, placeholder: "Date" %>
      </div>

      <div class="field">
      <%= form.file_field :image, id:"photo-image" %>
      </div>

      <div class="field">
      <%= form.text_area :text, placeholder: "Text", rows: "20", cols: "200" %>
      </div>
      <%= form.submit "SEND" %>
    <% end %>
  </div>
</div>

GemFile

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.5'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.0'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.4.4'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of web drivers to run system tests with browsers
  gem 'webdrivers'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'devise'

gem 'mini_magick'
gem 'image_processing', '~> 1.2'

gem 'pry-rails'

photoモデル

class Photo < ApplicationRecord
  belongs_to :user
  has_one_attached :image

  validates :title, presence: true
  validates :text,  presence: true
  validates :date,  presence: true
  validates :image, presence: true
end

photosコントローラー

class PhotosController < ApplicationController
  def index
  end

  def new
    @photo = Photo.new
  end

  def create
    # Photo.create(photo_params) #createメソッドの引数に使用して、photosテーブルへ保存できるよう
    @photo = Photo.new(photo_params)
    if @photo.save
      redirect_to root_path
    else
      render :new
    end
  end

  def show
    @photos = Photo.all
  end

  def edit
    @photo = Photo.find(params[:id])
  end

  def update
    photo = Photo.find(params[:id])
    photo.update(photo_params)
    if photo.update
      redirect_to photo_path(photo.id), method: :get
    end
  end

  def destroy
    photo = Photo.find(params[:id])
    photo.destroy
    if photo.destroy
      redirect_to root_path
    end
  end

  private

  def photo_params
    params.require(:photo).permit(:title, :date, :image, :text).merge(user_id: current_user.id)
  end
end