ruby on rails ： paperclip s3導入したのですが、DBに画像が保存されません。

DBにファイルの方が保存されません。
どこが間違っているのでしょうか？

バージョン

Rails：5.1.2
Ruby：2.3.4

model

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable,
         :omniauthable, omniauth_providers: [:facebook]

   validates :name, presence: true, uniqueness: true, length: { minimum: 3 ,maximum: 20 }, format: { with: /\A[a-z0-9]+\z/i }
   validates :email, {presence: true, uniqueness: true}
   validates :description, length: { maximum: 20 }

   has_many :likes, :dependent => :destroy
   has_many :customers, :dependent => :nullify
   has_many :reviews, :dependent => :nullify
   has_many :supports, :dependent => :destroy
   has_many :replies, :dependent => :destroy
   has_many :votes, :dependent => :nullify
   has_many :articles, :dependent => :destroy
   has_many :contributions, :dependent => :destroy

   include FriendlyId
   friendly_id :name, use: [:slugged, :history]

   def should_generate_new_friendly_id?
      name_changed?
   end

   def normalize_friendly_id(value)
      value.to_s.parameterize.present? ? value.to_s.parameterize : value
   end

   has_attached_file :avatar, :styles => {
                                :thumb  => "100x100",
                                :medium => "200x200"
                              },
                              :default_url => "avatar-default.png",
                              :storage => :s3,
                              :s3_permissions => :private,
                              :s3_credentials => "#{Rails.root}/config/s3.yml",
                              :path => ":attachment/:id/:style.:extension"

   validates_attachment_content_type :avatar, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]

 def authenticated_image_url(style)
   image.s3_object(style).url_for(:read, :secure => true)
 end

 def self.from_omniauth(auth)
   where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
     user.provider = auth.provider
     user.email = auth.info.email
     user.password = Devise.friendly_token[0,20]
     user.name = auth.info.name   # assuming the user model has a name
     user.avatar = auth.info.image # assuming the user model has an image
     # If you are using confirmable and the provider(s) you use validate emails,
     # uncomment the line below to skip the confirmation emails.
     # user.skip_confirmation!
   end
 end

 def connected?
   !stripe_user_id.nil?
 end



end

###　controller

class UsersController < ApplicationController
 before_action :authenticate_user, {only: [:likes, :edit, :update]}
 before_action :ensure_correct_user, {only: [:edit, :update]}


  def edit
    @user = current_user
  end

  def update
    @user = User.friendly.find(params[:id])

    if User.update(user_params)
      redirect_to user_path(current_user), notice: "ユーザー情報を編集しました", :status => :moved_permanently
    else
      redirect_to edit_user_path(current_user), notice: "ユーザー情報が編集できませんでした"
    end
  end



 private

 def user_params
   params.require(:user).permit(:avatar, :name, :email,  :headline, :description)
 end

end

view

            <%= form_for(@user, multipart: true) do |f| %>
                <div class="col-md-6 col-md-offset-3 item-new-form-page">
                    <div class="form-group item-new-form">

                        <strong> 基本情報<span class="important">（必須）</span></strong><br>
                        <%= f.label :ユーザー名 %><br />
                        <%= f.text_field :name, autofocus: true, :placeholder => "半角英数字のみ", :class => 'form-control', required: "true" %><br />
                        <%= f.label :メールアドレス %><br />
                        <%= f.email_field :email, :placeholder => "メールアドレス", :class => 'form-control', required: "true" %><br />

                    </div>
                </div>

                <div class="col-md-6 col-md-offset-3 item-new-form-page">
                    <div class="form-group item-new-form">

                        <strong>ユーザー情報</strong><br />
                        <%= f.label :プロフィール画像 %><br />
                        <%= f.file_field :avatar, :class => 'form-control' %><br />
                        <strong>ヘッドライン</strong>
                        <span class="count-word">残り<span class="count"></span>文字</span>
                        <%= f.text_area :description, :placeholder => "自己紹介",rows: 3, id: "memo_text", :class => 'form-control' %><br />

                        <hr>

                        <div class="actions text-center">
                            <%= f.submit "プロフィールを更新する", class: "btn btn-default" %>
                        </div>

                    </div>
                </div>
            <% end %>

Gemfile

gem 'paperclip'
gem 'aws-sdk-s3'
gem 'aws-sdk', '~> 2.3'

config/environments/development.rb

config.file_watcher = ActiveSupport::EventedFileUpdateChecker
   config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

   config.paperclip_defaults = {
  storage: :s3,
  s3_credentials: {
    bucket: ENV.fetch('S3_BUCKET_NAME'),
    access_key_id: ENV.fetch('AWS_ACCESS_KEY_ID'),
    secret_access_key: ENV.fetch('AWS_SECRET_ACCESS_KEY'),
    s3_region: 'ap-northeast-1',
  }
}

config/s3.yml

bucket: '**********'
access_key_id: '***********************'
secret_access_key: '******************************'
s3_host_name: s3-ap-northeast-1.amazonaws.com

Parameters

Parameters: {"utf8"=>"✓", "authenticity_token"=>"cMMt/5ftCBM9hDyrS8QiojILGeLgND0m9tddKkI+Fyn/yEGZ7mdejioSPBpsIVnKJ+bsJwEJZ9HIazIJwdvc/I1A==", "user"=>{"name"=>"admin", "email"=>"admin@gmail.com", "avatar"=>#<ActionDispatch::Http::UploadedFile:0x007fa866508410 @tempfile=#<Tempfile:/var/folders/1z/psyvq9q911b7hclx5xw03dk40000gn/T/RackMultipart20190527-9142-fa753n.jpg>, @original_filename="PCxV2U8Z_400x400.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"user[avatar]\"; filename=\"PCxV2U8Z_400x400.jpg\"\r\nContent-Type: image/jpeg\r\n">, "description"=>"よろしくお願い致します。"}, "commit"=>"プロフィールを更新する", "id"=>"admin"}

解決方法が分かりませんので、ご教授よろしくお願い致します！
不足がございましたら、コメントしていただけますと幸いです。