質問編集履歴

修正

2020/09/05 11:48

投稿

スコア14

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -250,7 +250,9 @@
 **book.rb**
+```
-```class Book < ApplicationRecord
+class Book < ApplicationRecord
   validates :name, presence: true
@@ -260,39 +262,49 @@
   validates :author, presence: true
+  belongs_to :user
+  has_many :categories
+  has_many :categories, through: :books_categories
+end
+```
+**category.rb**
+```
+class Category < ApplicationRecord
+  validates :name, presence: true
+  has_many :books
+  has_many :books, through: :books_categories
+end
+```
+**book_category.rb**
+```
+class BookCategory < ApplicationRecord
+  validates :book_id, presence: true
   validates :category_id, presence: true
-  belongs_to :user
-  has_many :categories
-  has_many :categories, through: :books_categories
-end
-```
-**category.rb**
-```
-class Category < ApplicationRecord
-  has_many :books
-  has_many :books, through: :books_categories
-end
-```
-**book_category.rb**
-```
-class BookCategory < ApplicationRecord
   belongs_to :book

修正

2020/09/05 11:48

投稿

スコア14

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -248,6 +248,96 @@
 ```
+**book.rb**
+```class Book < ApplicationRecord
+  validates :name, presence: true
+  validates :price, presence: true
+  validates :image, presence: true
+  validates :author, presence: true
+  validates :category_id, presence: true
+  belongs_to :user
+  has_many :categories
+  has_many :categories, through: :books_categories
+end
+```
+**category.rb**
+```
+class Category < ApplicationRecord
+  has_many :books
+  has_many :books, through: :books_categories
+end
+```
+**book_category.rb**
+```
+class BookCategory < ApplicationRecord
+  belongs_to :book
+  belongs_to :category
+end
+```
+**user.rb**
+```
+class User < ApplicationRecord
+  # Include default devise modules. Others available are:
+  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
+  devise :database_authenticatable, :registerable,
+         :recoverable, :rememberable, :validatable
+end
+```
+**application_record.rb**
+```
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end
+```
 #自分で調べたことや試したこと
 ・　下記category_idの記述の仕方が違うと判断し、検索して出てきた記述を書いてみたが全て違った

修正

2020/09/05 11:04

投稿

スコア14

test CHANGED Viewed

File without changes

test CHANGED Viewed

@@ -50,21 +50,97 @@
 ```
+class BooksController < ApplicationController
+  before_action :move_to_index, except: [:index, :show]
+  before_action :set_book, only: [:edit, :show]
+  def index
+    @books = Book.all.order(created_at: :DESC)
+  end
+  def new
+    @book = Book.new
+  end
   def create
+    ActiveRecord::Base.transaction do
-    Book.create(book_params)
+      book = Book.create!(book_params)
+      BookCategory.create!(book: book, category_id: params[:category])
+    end
+    redirect_to root_path
+  rescue ActiveRecord::RecordInvalid => e
+    render :new
+  end
+  def destroy
+    book = Book.find(params[:id])
+    book.destroy
-    if Book.create
+    if !book.save
       redirect_to root_path
+    end
+  end
+  def show
+  end
+  def edit
+  end
+  def update
+    book = Book.find(params[:id])
+    book.update(book_params)
+    if book.save
+      redirect_to book_path(book.id)
     else
-      render :new
+      render :index
-    end
+    end
-  end
+  end
@@ -74,11 +150,35 @@
   def book_params
+    params
-    params.require(:book).permit(:name, :price, :author, :image, :user_id, { category_id: [] })
+      .require(:book).permit(:name, :price, :author, :image)
+      .merge(user_id: current_user.id)
-  end
+  end
+  def set_book
+    @book = Book.find(params[:id])
+  end
+  def move_to_index
+    unless user_signed_in?
+      redirect_to action: :index
+    end
+  end
+end
 ```