editページで画像をアップロードすることができない状態になっています。

Question

私は、editページでも画像をアップロードしたいと考えています。しかし、newページでは、画像をアップロードすることができるのですが、editページでは、画像が保存できない状態になっています。

Started GET "/users/2/user_upload" for ::1 at 2020-07-25 16:59:34 +0900
Processing by UsersController#user_upload as HTML
  Parameters: {"id"=>"2"}
  User Load (0.6ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1
  User Load (0.4ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2  ORDER BY `users`.`id` ASC LIMIT 1
   (5.9ms)  SELECT COUNT(*) FROM `notifications` WHERE `notifications`.`visited_id` = 2 AND `notifications`.`checked` = 0
  CACHE (0.0ms)  SELECT COUNT(*) FROM `notifications` WHERE `notifications`.`visited_id` = 2 AND `notifications`.`checked` = 0  [["visited_id", 2], ["checked", false]]
  Rendered users/user_upload.html.erb (518.9ms)
Completed 200 OK in 525ms (Views: 514.4ms | ActiveRecord: 6.9ms)


Started PATCH "/users/2/done" for ::1 at 2020-07-25 16:59:44 +0900
Processing by UsersController#done as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"QD/BS6xFHbWPe0SB/sFwzyx7XeAT6WDsVFXpKeD+H+qcjznT0nfWUrFJh5YkToP6VAyO7wzQ1ns5Jn3GZgxZXA==", "event_background"=>"planets.jpg", "id"=>"2"}
  User Load (0.6ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2 LIMIT 1
  User Load (0.4ms)  SELECT  `users`.* FROM `users` WHERE `users`.`id` = 2  ORDER BY `users`.`id` ASC LIMIT 1
Unpermitted parameters: utf8, _method, authenticity_token, id
   (0.4ms)  BEGIN
  SQL (58.2ms)  UPDATE `users` SET `event_background` = '08084920174', `updated_at` = '2020-07-25 07:59:44' WHERE `users`.`id` = 2
   (42.7ms)  COMMIT
   (0.3ms)  SELECT COUNT(*) FROM `notifications` WHERE `notifications`.`visited_id` = 2 AND `notifications`.`checked` = 0
  CACHE (0.0ms)  SELECT COUNT(*) FROM `notifications` WHERE `notifications`.`visited_id` = 2 AND `notifications`.`checked` = 0  [["visited_id", 2], ["checked", false]]
  Rendered users/done.html.erb (443.0ms)
Completed 200 OK in 570ms (Views: 448.3ms | ActiveRecord: 102.7ms)

def user_upload
        @user   = User.find(params[:id])
        @group    = current_user.groups.group(:group_name).page(params[:page]).per(1).order("created_at DESC")

        render layout: false
    end

    def done
        @user   = User.find(params[:id])
        if @user.id == current_user.id
            @user.update(user_params)
        end
       
        render layout: false
    end

    def create
		User.create(event_background: params[:event_background])
    end

    private
    def user_params
    	params.permit(:event_background)
    end

  get "/users/:id/user_upload" => "users#user_upload"
  get "/users/:id/done" => "users#done"
  patch "/users/:id/done" => "users#done"

mount_uploader :event_background, EventBackgroundUploader

add_column :users, :event_background, :text

Answer 1

form_tagに:multipart => trueを加えたら、解決できました。