質問編集履歴
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写真の貼り付けではなく、<code>を使って記載
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@@ -28,38 +28,257 @@
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下記のようなエラーが出てしまい、解決策が分からないため、ご教授いただけると幸いです。
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### 発生している問題・エラーメッセージ
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```
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コード
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NoMethodError in Books#create
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Showing /home/ec2-user/environment/Bookers2/app/views/users/_user_show.html.erb where line #7 raised:
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undefined method `name' for nil:NilClass
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Extracted source (around line #7):
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38
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5 <tbody>
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6 <tr>
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7 <th>name</th><th><%= user.name %></th>
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8 </tr>
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9 <tr>
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10 <th>introduction</th><th><%= user.introduction %></th>
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-
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```
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### 該当のソースコード
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```
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ソースコード
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・models/book.rb
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[ブックモデル]
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class Book < ApplicationRecord
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belongs_to :user
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validates :title, presence: true
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validates :body, presence: true
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validates :body, length: { maximum: 200 }
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end
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・_user_show.html(部分テンプレートです）
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[ユーザーモデル]
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class User < ApplicationRecord
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# Include default devise modules. Others available are:
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# :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
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devise :database_authenticatable, :registerable,
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:recoverable, :rememberable, :validatable
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has_many :books, dependent: :destroy
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attachment :profile_image
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validates :name, uniqueness: true
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validates :name, length: { in: 2..20 }
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validates :introduction, length: { maximum: 50 }
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end
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[ブックコントローラー]
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class BooksController < ApplicationController
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before_action :authenticate_user!
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before_action :ensure_correct_user, only:[:edit]
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def new
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@book = Book.new
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end
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def create
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@book = Book.new(book_params)
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@book.user_id = current_user.id
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if @book.save
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flash[:notice] = "You have created book successfully."
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redirect_to book_path(@book)
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else
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render :index
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end
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end
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def index
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@books = Book.all
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@user = current_user
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@book = Book.new
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end
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def show
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@book = Book.find(params[:id])
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@book_new = Book.new
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end
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def edit
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@book = Book.find(params[:id])
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end
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def update
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@book = Book.find(params[:id])
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@book.user_id = current_user.id
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if @book.update(book_params)
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flash[:notice] = "You have updated book successfully."
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redirect_to book_path(@book)
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else
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render :edit
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end
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end
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def destroy
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@book = Book.find(params[:id])
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@book.destroy
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redirect_to books_path
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end
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private
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def book_params
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params.require(:book).permit(:title, :body)
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end
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def ensure_correct_user
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@book = Book.find(params[:id])
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unless @book.user == current_user
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redirect_to user_path
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end
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end
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end
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[ユーザーコントローラー]
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class UsersController < ApplicationController
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before_action :authenticate_user!
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before_action :ensure_correct_user, only:[:edit, :show]
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def show
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@user = User.find(params[:id])
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@book = Book.new
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@books = @user.books
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end
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def new
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@book = Book.new
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end
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def create
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@book = Book.new(book_params)
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@book.user_id = current_user.id
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if @book.save
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redirect_to book_path(@book)
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else
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render :index
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end
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end
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def index
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@users = User.all
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end
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def edit
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@user = User.find(params[:id])
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end
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def update
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@user = User.find(params[:id])
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@user = current_user
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if @user.update(user_params)
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flash[:notice] = "You have updated user succeessfully."
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redirect_to user_path(@user)
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else
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render :edit
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end
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end
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private
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def user_params
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params.require(:user).permit(:name, :introduction, :profile_image_id)
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end
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def ensure_correct_user
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@user = User.find(params[:id])
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unless @user == current_user
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redirect_to user_path(current_user.id)
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end
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end
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end
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[部分テンプレート、_book_new.html]
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<h2>New book</h2>
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<%= form_with model: book, local:true do |f| %>
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<div class="form-group">
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<%= f.label :title, 'Title' %>
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<%= f.text_field :title, class: 'form-control' %>
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</div>
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<div class="form-group">
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<%= f.label :body, 'Opinion' %>
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<%= f.text_area :body, class: 'form-control' %>
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</div>
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<div><%= f.submit 'Create Book', class: 'btn btn-success' %></div>
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<% end %>
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[部分テンプレート、_user_show.html]
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<h2>User info</h2>
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<%= attachment_image_tag user, :profile_image, size: "60x60", farmat: 'jpg', fallback: "no_image.jpg" %>
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<table class="table">
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<tbody>
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<tr>
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<th>name</th><th><%= user.name %></th>
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</tr>
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<tr>
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<th>introduction</th><th><%= user.introduction %></th>
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</tr>
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</tbody>
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</table>
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<div class="row">
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<%= link_to edit_user_path(user), class: "btn btn-outline-dark btn-block" do %>
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<span class="fas fa-user-cog"></span>
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<% end %>
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</div>
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[books/index.html（投稿に失敗した時は本の一覧画面に返るようにしたいので、ここに<% if @book.errors.any? %>を書きました）]
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<div class="container">
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<div class="row">
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<% if @book.errors.any? %>
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<%= @book.errors.count %>error prohibited this book from being saved:<br>
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<% @book.errors.full_messages.each do |message| %>
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<%= message %>
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<% end %>
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<% end %>
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<div class="col-md-3">
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<%= render 'users/user_show', user: @user %>
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<%= render 'books/book_new', book: @book %>
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</div>
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<div class="col-md-8 offset-md-1 pt-3">
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<%= render 'books/book_index', books: @books %>
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</div>
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</div>
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```
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63
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### 試したこと
|
|
64
283
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65
284
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コントローラなど見返したのですが、どのように直せば良いか分からなかったです。
|
|
@@ -67,4 +286,7 @@
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|
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67
286
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|
68
287
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### 補足情報（FW/ツールのバージョンなど）
|
|
69
288
|
|
|
70
|
-
ここにより詳細な情報を記載してください。
|
|
289
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+
ここにより詳細な情報を記載してください。
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290
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ご指摘ありがとうございます。
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291
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コピペして訂正しました、
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初めての質問で見辛い点もあるかと思いますが、よろしくお願いいたします。
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