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トップに関する質問ユーザーのログアウトをするとエラーが起きる

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質問編集履歴

2

内容の修正

2021/05/20 16:50

投稿

yuu0000
yuu0000

スコア4

test CHANGED
File without changes
test CHANGED
@@ -14,7 +14,7 @@
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- ログアウトはdeviseを使用した機能になっております。
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+ ログアウトはdeviseを使用した機能になっております。また、ログアウトを何も投稿していない時にすると正常にログアウトできるのですが、``投稿後にログアウトをするとエラーが起きる``状況です。
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@@ -222,6 +222,154 @@
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+ **app/controllers/uploads_controller.er**
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+
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+
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+
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+ ```controller
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+
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+ class UploadsController < ApplicationController
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+
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+ before_action :authenticate_user!, except: [:index, :show]
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+
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+ before_action :set_upload, only: [:show, :edit, :update, :destroy]
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+
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+
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+
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+
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+
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+ def index
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+
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+ @uploads = Upload.all.order(created_at: :desc)
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+
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+ @tag_list = Tag.all
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+
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+ end
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+
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+
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+
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+ def new
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+
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+ @upload_form = UploadForm.new
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+
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+ end
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+
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+
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+
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+ def create
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+
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+ @upload_form = UploadForm.new(upload_params)
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+
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+ tag_list = params[:upload][:name].split(",")
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+
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+ if @upload_form.valid?
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+
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+ @upload_form.save(tag_list)
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+
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+ redirect_to root_path
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+
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+ else
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+
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+ render :new
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+
275
+ end
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+
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+ end
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+
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+
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+
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+ def show
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+
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+ @tag = @upload.tags
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+
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+ end
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+
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+
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+
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+ def edit
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+
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+ @upload_form = UploadForm.new(upload: @upload)
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+
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+ if current_user.id != @upload.user.id
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+
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+ redirect_to root_path
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+
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+ end
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+
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+ end
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+
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+
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+
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+ def update
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+
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+ @upload_form = UploadForm.new(upload_params, upload: @upload)
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+
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+ tag_list = params[:upload][:name].split(",")
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+
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+ if @upload_form.valid?
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+
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+ @upload_form.save(tag_list)
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+
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+ redirect_to upload_path(@upload.id)
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+
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+ else
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+
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+ render :edit
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+
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+ end
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+
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+ end
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+
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+
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+
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+ def destroy
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+
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+ @upload.image.purge if @upload.image.attached?
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+
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+ if current_user.id == @upload.user.id
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+
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+ @upload.destroy
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+
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+ redirect_to root_path
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+
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+ else
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+
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+ render :show
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+
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+ end
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+
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+
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+
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+ end
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+
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+
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+
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+ private
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+
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+
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+
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+ def upload_params
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+
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+ params.require(:upload).permit(:title, :text, :url, :working_day, :day_off, :cafe_wifi_id, :cafe_charging_id, :cafe_smoking_id, :image, :name).merge(user_id: current_user.id)
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+
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+ end
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+
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+
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+
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+ def set_upload
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+
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+ @upload = Upload.find(params[:id])
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+
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+ end
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+
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+ end
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+
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+
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+
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+ ```
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+
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+
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+
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  **app/views/shared/_header.html.erb**
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@@ -292,6 +440,32 @@
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+ **app/config/routes.rb**
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+
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+
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+
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+ ```config
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+
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+ Rails.application.routes.draw do
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+
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+ devise_for :users
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+
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+ get 'uploads/index'
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+
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+ root to: "uploads#index"
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+
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+ resources :uploads
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+
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+ resources :users, only: :show
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+
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+ end
462
+
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+
464
+
465
+ ```
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+
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+
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+
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  ### 試したこと
@@ -306,6 +480,54 @@
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+ ・ログアウトの挙動を調べましたが、投稿をしていない場合ではログアウトができますが、``投稿後にログアウトをするとエラーが起きる``ことがわかりました。
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+
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+
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+
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+ ・検証としては、``current_userが空``となっているために、ログアウトしようとするとログインユーザーを見つけることができないために起きるエラーと考えました。
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+
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+
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+
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+ ##エラーメッセージの値の確認
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+
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+
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+
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+ ```
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+
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+ >> @uploads
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+
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+ => #<ActiveRecord::Relation [#<Upload id: 1, title: "testcafe", text: "カフェの説明", url: "", working_day: "", day_off: "", cafe_wifi_id: 1, cafe_charging_id: 1, cafe_smoking_id: 1, user_id: 1, created_at: "2021-05-20 16:14:11.950862000 +0000", updated_at: "2021-05-20 16:14:11.997068000 +0000">]>
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+
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+
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+
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+ >> upload.id
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+
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+ => 1
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+
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+
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+
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+ >> upload
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+
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+ => #<Upload id: 1, title: "testcafe", text: "カフェの説明", url: "", working_day: "", day_off: "", cafe_wifi_id: 1, cafe_charging_id: 1, cafe_smoking_id: 1, user_id: 1, created_at: "2021-05-20 16:14:11.950862000 +0000", updated_at: "2021-05-20 16:14:11.997068000 +0000">
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+
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+
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+
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+ >> current_user
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+
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+ => nil
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+
519
+
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+
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+ >> current_user.id
522
+
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+ NoMethodError: undefined method `id' for nil:NilClass
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+
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+ from (eval):1:in `block in _app_views_uploads_index_html_erb___1943206866683830353_21680'
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+
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+ ```
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+
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+
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+
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  ### 補足情報（FW/ツールのバージョンなど）

1

エラー文の修正

2021/05/20 16:50

投稿

yuu0000
yuu0000

スコア4

test CHANGED
File without changes
test CHANGED
@@ -28,10 +28,72 @@
28
28
 
29
29
  NoMethodError in Uploads#index
30
30
 
31
+ Showing /Users/fujimotoyuunosuke/RubymineProjects/locat/app/views/uploads/index.html.erb where line #117 raised:
32
+
31
33
 
32
34
 
33
35
  undefined method `id' for nil:NilClass
34
36
 
37
+ Extracted source (around line #117):
38
+
39
+ 115
40
+
41
+ 116
42
+
43
+ 117
44
+
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+ 118
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+
47
+ 119
48
+
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+ 120
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+
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+
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+
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+ </div>
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+
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+ <p class="upload-user">
56
+
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+ <%= link_to image_tag(upload.user.avatar, class: "avatar-img"), user_path(current_user.id) %>⇦この部分
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+
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+ <%= link_to upload.user.name, user_path(current_user.id), class: "upload-user__name" %>
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+
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+ </p>
62
+
63
+ </div>
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+
65
+
66
+
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+ Extracted source (around line #98):
68
+
69
+ 96
70
+
71
+ 97
72
+
73
+ 98
74
+
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+ 99
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+
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+ 100
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+
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+ 101
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+
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+
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+
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+ <% @uploads.each do |upload| %>
84
+
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+ <div class="content-page">
86
+
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+ <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>⇦この部分
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+
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+ <div class="upload-contents-wrapper">
90
+
91
+ <div class="upload-img-contents">
92
+
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+ <%= image_tag upload.image, class: "upload-img" if upload.image.attached? %>
94
+
95
+
96
+
35
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  Extracted source (around line #96):
36
98
 
37
99
  94
@@ -52,150 +114,90 @@
52
114
 
53
115
  <div id="content-table">
54
116
 
117
+ <% @uploads.each do |upload| %>⇦この部分
118
+
119
+ <div class="content-page">
120
+
121
+ <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>
122
+
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+ <div
124
+
125
+ ```
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+
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+
128
+
129
+
130
+
131
+
132
+
133
+ ### 該当のソースコード
134
+
135
+ **app/views/uploads/index.html.erb**
136
+
137
+
138
+
139
+ ```erb
140
+
141
+ <div id="content-table">
142
+
55
143
  <% @uploads.each do |upload| %>
56
144
 
57
145
  <div class="content-page">
58
146
 
59
- <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>⇦この部分
147
+ <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>
60
148
 
61
149
  <div class="upload-contents-wrapper">
62
150
 
63
-
64
-
65
- undefined method `id' for nil:NilClass
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-
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- Extracted source (around line #98):
68
-
69
- 96
70
-
71
- 97
72
-
73
- 98
74
-
75
- 99
76
-
77
- 100
78
-
79
- 101
80
-
81
-
82
-
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- <% @uploads.each do |upload| %>
84
-
85
- <div class="content-page">
86
-
87
- <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>⇦この部分
88
-
89
- <div class="upload-contents-wrapper">
90
-
91
151
  <div class="upload-img-contents">
92
152
 
93
153
  <%= image_tag upload.image, class: "upload-img" if upload.image.attached? %>
94
154
 
95
-
155
+ </div>
156
+
96
-
157
+ <div class="upload-contents-detail">
158
+
159
+ <div class="upload-name"><%= upload.title %></div>
160
+
97
- undefined method `id' for nil:NilClass
161
+ <div class="tag-container">
98
-
162
+
99
- Extracted source (around line #96):
163
+ <% upload.tags.each do |tag| %>
164
+
100
-
165
+ <div class="upload-tags">
166
+
167
+ #<%= tag.name %>
168
+
169
+ </div>
170
+
101
- 94
171
+ <% end %>
172
+
102
-
173
+ </div>
174
+
175
+ </div>
176
+
177
+ <div class="upload-contents-explain">
178
+
179
+ <div class="upload-explain"><%= upload.text %></div>
180
+
181
+ </div>
182
+
183
+ <p class="upload-user">
184
+
185
+ <%= link_to image_tag(upload.user.avatar, class: "avatar-img"), user_path(current_user.id) %>
186
+
187
+ <%= link_to upload.user.name, user_path(current_user.id), class: "upload-user__name" %>
188
+
103
- 95
189
+ </p>
190
+
104
-
191
+ </div>
192
+
105
- 96
193
+ <% end %>
194
+
106
-
195
+ </div>
196
+
107
- 97
197
+ <% end %>
108
-
109
- 98
110
-
111
- 99
112
-
113
-
114
198
 
115
199
  </div>
116
200
 
117
- <div id="content-table">
118
-
119
- <% @uploads.each do |upload| %>⇦この部分
120
-
121
- <div class="content-page">
122
-
123
- <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>
124
-
125
- <div class="upload-contents-wrapper">
126
-
127
- ```
128
-
129
-
130
-
131
- ### 該当のソースコード
132
-
133
- **app/views/uploads/index.html.erb**
134
-
135
-
136
-
137
- ```erb
138
-
139
- <div id="content-table">
140
-
141
- <% @uploads.each do |upload| %>
142
-
143
- <div class="content-page">
144
-
145
- <%= link_to upload_path(upload.id), class: "upload-link", method: :get do %>
146
-
147
- <div class="upload-contents-wrapper">
148
-
149
- <div class="upload-img-contents">
150
-
151
- <%= image_tag upload.image, class: "upload-img" if upload.image.attached? %>
152
-
153
- </div>
154
-
155
- <div class="upload-contents-detail">
156
-
157
- <div class="upload-name"><%= upload.title %></div>
158
-
159
- <div class="tag-container">
160
-
161
- <% upload.tags.each do |tag| %>
162
-
163
- <div class="upload-tags">
164
-
165
- #<%= tag.name %>
166
-
167
- </div>
168
-
169
- <% end %>
170
-
171
- </div>
172
-
173
- </div>
174
-
175
- <div class="upload-contents-explain">
176
-
177
- <div class="upload-explain"><%= upload.text %></div>
178
-
179
- </div>
180
-
181
- <p class="upload-user">
182
-
183
- <%= link_to image_tag(upload.user.avatar, class: "avatar-img"), user_path(current_user.id) %>
184
-
185
- <%= link_to upload.user.name, user_path(current_user.id), class: "upload-user__name" %>
186
-
187
- </p>
188
-
189
- </div>
190
-
191
- <% end %>
192
-
193
- </div>
194
-
195
- <% end %>
196
-
197
- </div>
198
-
199
201
  ```
200
202
 
201
203
  **app/controllers/users_controller.rb**