質問編集履歴
3
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title
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File without changes
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body
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@@ -124,12 +124,12 @@
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= render partial: 'footer.html.haml'
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```
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**book.rb**
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+
```
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-
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class Book < ApplicationRecord
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validates :name, presence: true
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validates :price, presence: true
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validates :image, presence: true
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validates :author, presence: true
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-
validates :category_id, presence: true
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belongs_to :user
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has_many :categories
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@@ -139,6 +139,8 @@
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**category.rb**
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```
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class Category < ApplicationRecord
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validates :name, presence: true
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+
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has_many :books
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has_many :books, through: :books_categories
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end
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@@ -146,6 +148,10 @@
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**book_category.rb**
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```
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class BookCategory < ApplicationRecord
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validates :book_id, presence: true
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validates :category_id, presence: true
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+
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+
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belongs_to :book
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belongs_to :category
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end
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2
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title
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File without changes
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body
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@@ -123,6 +123,51 @@
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%footer
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= render partial: 'footer.html.haml'
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```
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126
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+
**book.rb**
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127
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+
```class Book < ApplicationRecord
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validates :name, presence: true
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+
validates :price, presence: true
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130
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+
validates :image, presence: true
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131
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+
validates :author, presence: true
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+
validates :category_id, presence: true
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+
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+
belongs_to :user
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+
has_many :categories
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136
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has_many :categories, through: :books_categories
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+
end
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+
```
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139
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+
**category.rb**
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140
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+
```
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+
class Category < ApplicationRecord
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+
has_many :books
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+
has_many :books, through: :books_categories
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end
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+
```
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146
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+
**book_category.rb**
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```
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class BookCategory < ApplicationRecord
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belongs_to :book
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+
belongs_to :category
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end
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```
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+
**user.rb**
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```
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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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end
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+
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```
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**application_record.rb**
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```
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class ApplicationRecord < ActiveRecord::Base
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self.abstract_class = true
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end
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+
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```
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+
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#自分で調べたことや試したこと
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・ 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
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> params.require(:book).permit(:name, :price, :author, :image, :user_id, { category_id: [] })
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1
修正
title
CHANGED
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File without changes
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body
CHANGED
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@@ -24,21 +24,71 @@
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24
24
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#該当のソースコード
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25
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**books_controller.rb**
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26
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```
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+
class BooksController < ApplicationController
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before_action :move_to_index, except: [:index, :show]
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29
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before_action :set_book, only: [:edit, :show]
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+
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def index
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@books = Book.all.order(created_at: :DESC)
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33
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end
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34
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+
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35
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+
def new
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36
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@book = Book.new
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37
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+
end
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38
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+
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27
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def create
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40
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+
ActiveRecord::Base.transaction do
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28
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-
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41
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+
book = Book.create!(book_params)
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42
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BookCategory.create!(book: book, category_id: params[:category])
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43
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end
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44
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redirect_to root_path
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45
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rescue ActiveRecord::RecordInvalid => e
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46
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render :new
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47
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+
end
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48
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+
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49
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def destroy
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50
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book = Book.find(params[:id])
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51
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book.destroy
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29
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-
if
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52
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+
if !book.save
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30
53
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redirect_to root_path
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54
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+
end
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55
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+
end
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56
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+
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57
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+
def show
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58
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+
end
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59
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+
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60
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+
def edit
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61
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+
end
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62
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+
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63
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+
def update
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64
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+
book = Book.find(params[:id])
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65
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+
book.update(book_params)
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66
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if book.save
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67
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redirect_to book_path(book.id)
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31
68
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else
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32
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-
render :
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69
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+
render :index
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33
70
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end
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34
71
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end
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35
72
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73
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+
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36
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private
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37
75
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38
76
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def book_params
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77
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+
params
|
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39
|
-
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78
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+
.require(:book).permit(:name, :price, :author, :image)
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79
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+
.merge(user_id: current_user.id)
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|
40
80
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end
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|
41
81
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|
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82
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+
def set_book
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83
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+
@book = Book.find(params[:id])
|
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84
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+
end
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|
85
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+
|
|
86
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+
def move_to_index
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|
87
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+
unless user_signed_in?
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88
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+
redirect_to action: :index
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|
89
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+
end
|
|
90
|
+
end
|
|
91
|
+
end
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42
92
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```
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43
93
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**new.html.haml**
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44
94
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投稿する画面のviewです。
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