書籍と著者のリレーションシップを定義。

app/controllers/authors_controller.rb

@@ -0,0 +1,65 @@
+class AuthorsController < ApplicationController
+  include Pagy::Backend
+  before_action :set_author, only: %i[show edit update destroy]
+
+  # GET /authors
+  def index
+    @authors = Author
+      .all
+    @q = @authors.ransack(params[:q])
+    @q.sorts = "id asc" if @q.sorts.empty?
+    @pagy, @authors = pagy(@q.result, page: params[:page], items: params[:items])
+  end
+
+  # GET /authors/1
+  def show
+  end
+
+  # GET /authors/new
+  def new
+    @author = Author.new
+  end
+
+  # GET /authors/1/edit
+  def edit
+  end
+
+  # POST /authors
+  def create
+    @author = Author.new(author_params)
+
+    if @author.save
+      redirect_to @author, notice: t("controller.create.success", model: Author.model_name.human)
+    else
+      render :new, status: :unprocessable_entity
+    end
+  end
+
+  # PATCH/PUT /authors/1
+  def update
+    if @author.update(author_params)
+      redirect_to @author, notice: t("controller.edit.success", model: Author.model_name.human)
+    else
+      render :edit, status: :unprocessable_entity
+    end
+  end
+
+  # DELETE /authors/1
+  def destroy
+    @author.destroy!
+    redirect_to authors_url, notice: t("controller.destroy.success", model: Author.model_name.human)
+  end
+
+  private
+
+    # Use callbacks to share common setup or constraints between actions.
+    def set_author
+      @author = Author
+        .find(params[:id])
+    end
+
+    # Only allow a list of trusted parameters through.
+    def author_params
+      params.require(:author).permit(:name)
+    end
+end

app/controllers/book_masters_controller.rb

@@ -61,6 +61,6 @@ def set_book_master
 
     # Only allow a list of trusted parameters through.
     def book_master_params
-      params.require(:book_master).permit(:isbn, :title, :publication_date, :ndc_category_id)
+      params.require(:book_master).permit(:isbn, :title, :publication_date, :ndc_category_id, {author_id: []})
     end
 end

app/helpers/authors_helper.rb

@@ -0,0 +1,3 @@
+module AuthorsHelper
+  include Pagy::Frontend
+end

app/models/author.rb

@@ -0,0 +1,8 @@
+class Author < ApplicationRecord
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[name id created_at updated_at]
+  end
+
+  has_many :book_author_relationship
+  has_many :book_masters, through: :book_author_relationship
+end

app/models/book_author_relationship.rb

@@ -0,0 +1,7 @@
+class BookAuthorRelationship < ApplicationRecord
+  def self.ransackable_attributes(_auth_object = nil)
+    %w[book_master_id author_id id created_at updated_at]
+  end
+  belongs_to :book_master
+  belongs_to :author
+end

app/models/book_master.rb

@@ -1,6 +1,11 @@
 class BookMaster < ApplicationRecord
   def self.ransackable_attributes(_auth_object = nil)
-    %w[isbn title publication_date ndc_category_id id created_at updated_at]
+    %w[isbn title publication_date ndc_category_id author_id id created_at updated_at]
+  end
+  def self.ransackable_associations(auth_object = nil)
+    ["authors", "book_author_relationship", "ndc_category"]
   end
   belongs_to :ndc_category
+  has_many :book_author_relationship
+  has_many :authors, through: :book_author_relationship
 end

app/views/authors/_author.html.erb

@@ -0,0 +1,42 @@
+<div id="<%= dom_id author %>">
+  <table class="table table-hover">
+    <tr>
+      <td>
+        <strong>Id:</strong>
+      </td>
+      <td>
+        <%= author.id %>
+      </td>
+    </tr>
+    <tr>
+      <td>
+        <strong>
+          <%= Author.human_attribute_name(:name) %>
+        </strong>
+      </td>
+      <td>
+        <%= author.name %>
+      </td>
+    </tr>
+    <tr>
+      <td>
+        <strong>
+          <%= Author.human_attribute_name(:created_at) %>
+        </strong>
+      </td>
+      <td>
+        <%= author.created_at && l(author.created_at) %>
+      </td>
+    </tr>
+    <tr>
+      <td>
+        <strong>
+          <%= Author.human_attribute_name(:updated_at) %>
+        </strong>
+      </td>
+      <td>
+        <%= author.updated_at && l(author.updated_at) %>
+      </td>
+    </tr>
+  </table>
+</div>

app/views/authors/_author.json.jbuilder

@@ -0,0 +1,2 @@
+json.extract! author, :id, :name, :created_at, :updated_at
+json.url author_url(author, format: :json)

app/views/authors/_form.html.erb

@@ -0,0 +1,45 @@
+<%= form_with(model: author, html: { class: %w[form-control form-control-sm] }) do |form| -%>
+  <%- if author.errors.any? -%>
+  <div style="color: red">
+    <h2><%= t("errors.template.header", model: Author.model_name.human, count: author.errors.count) %></h2>
+
+    <ul>
+    <% author.errors.each do |error| %>
+      <li><%= error.full_message %></li>
+    <%- end -%>
+    </ul>
+  </div>
+  <%- end -%>
+
+  <%- if author.persisted? -%>
+  <div>
+    <%= form.label :id, style: "display: block" %>
+    <div class="ps-2">
+      <%= form.number_field :id, class: %w[form-control form-control-sm], disabled: true %>
+    </div>
+  </div>
+  <%- end -%>
+  <div>
+    <%= form.label :name, style: "display: block" %>
+    <div class="ps-2">
+      <%= form.text_field :name, class: %w[form-control form-control-sm] %>
+    </div>
+  </div>
+  <%- if author.persisted? -%>
+  <div>
+    <%= form.label :created_at, style: "display: block" %>
+    <div class="ps-2">
+      <%= form.datetime_field :created_at, class: %w[form-control form-control-sm], disabled: true %>
+    </div>
+  </div>
+  <div>
+    <%= form.label :updated_at, style: "display: block" %>
+    <div class="ps-2">
+      <%= form.datetime_field :updated_at, class: %w[form-control form-control-sm], disabled: true %>
+    </div>
+  </div>
+  <%- end -%>
+  <div>
+    <%= form.submit class: %w[btn btn-primary] %>
+  </div>
+<% end %>

app/views/authors/edit.html.erb

@@ -0,0 +1,9 @@
+<h1><%= t("view.edit.title", model: Author.model_name.human) %></h1>
+<%= render "form", author: @author %>
+
+<br>
+
+<div>
+  <%= link_to t("view.edit.move_to_show", model: Author.model_name.human), @author %> |
+  <%= link_to t("view.edit.move_to_index", model: Author.model_name.human.pluralize), authors_path %>
+</div>

app/views/authors/index.html.erb

@@ -0,0 +1,111 @@
+<div style="display: flex;flex-direction: column;height: 100vh;">
+
+  <header class="main-content-header">
+    <p style="color: green"><%= notice %></p>
+
+    <h1><%= Author.model_name.human %><%= link_to "", new_author_path, class: %w[bi bi-plus-circle-fill ms-2] %></h1>
+
+  <div class="accordion">
+    <div class="accordion-item">
+      <h2 class="accordion-header" id="search-form-header">
+        <button
+          class="accordion-button collapsed"
+          type="button"
+          data-bs-toggle="collapse"
+          data-bs-target="#search-form"
+          aria-expanded="false"
+          aria-controls="search-form"><%= t("view.index.search_condition") %></button>
+      </h2>
+      <div id="search-form" class="panel panel-default accordion-collapse collapse" aria-labelledby="headingOne">
+<%= search_form_for @q, html: { class: %w[form-control form-control-sm], data: { turbo_frame: "list" } } do |f| %>
+        <div>
+          <%= f.label :id_eq %>
+          <div class="ps-2">
+            <%= f.number_field :id_eq, class: %w[form-control form-control-sm] %>
+          </div>
+        </div>
+        <div>
+          <%= f.label :name_cont %>
+          <div class="ps-2">
+            <%= f.search_field :name_cont, class: %w[form-control form-control-sm] %>
+          </div>
+        </div>
+        <div>
+          <%= f.label :created_at %>
+          <div class="ps-2">
+            <%= f.datetime_field :created_at_gteq, class: %w[form-control form-control-sm] %>
+            ～
+            <%= f.datetime_field :created_at_lteq_end_of_minute, class: %w[form-control form-control-sm] %>
+          </div>
+        </div>
+        <div>
+          <%= f.label :updated_at %>
+          <div class="ps-2">
+            <%= f.datetime_field :updated_at_gteq, class: %w[form-control form-control-sm] %>
+            ～
+            <%= f.datetime_field :updated_at_lteq_end_of_minute, class: %w[form-control form-control-sm] %>
+          </div>
+        </div>
+        <%= f.hidden_field :limit, id: "f-limit", value: params[:limit] || Pagy::DEFAULT[:limit] %>
+        <%= f.submit class: %w[btn btn-primary] %>
+        <input
+          type="reset"
+          class="btn btn-primary"
+          onclick="clear_form(arguments[0], this)"
+          value="<%= t("helpers.submit.clear") %>">
+<%- end -%>
+      </div>
+    </div>
+  </header>
+
+  <main style="flex-grow: 1;flex-shrink: 1;overflow-y: auto;">
+<%= turbo_frame_tag "list" do %>
+  <div id="authors" class="text-nowrap">
+    <table class="table table-hover text-nowrap">
+      <thead class="table-light sticky-top">
+        <th><%= sort_link(@q, :id, default_order: :asc, class: "d-block") %></th>
+        <th><%= sort_link(@q, :name, default_order: :asc, class: "d-block") %></th>
+        <th><%= sort_link(@q, :created_at, default_order: :asc, class: "d-block") %></th>
+        <th><%= sort_link(@q, :updated_at, default_order: :asc, class: "d-block") %></th>
+        <th><%= t("view.index.operation") %></th>
+      </thead>
+      <tbody>
+  <%- @authors.each do |author| %>
+        <tr
+          tabindex="0"
+          role="button"
+          onkeypress="handleEnterKeypressListIten(arguments[0], this, '<%= url_target(nil, author).to_s %>')"
+          onclick="handleClickListItem(arguments[0], this, '<%= url_target(nil, author).to_s %>')">
+          <td><%= author.id %></td>
+          <td><%= author.name %></td>
+          <td><%= author.created_at && l(author.created_at) %></td>
+          <td><%= author.updated_at && l(author.updated_at) %></td>
+          <td>
+            <%= button_to(
+                  t("helpers.submit.delete"),
+                  author,
+                  method: :delete,
+                  tabindex: 0,
+                  class: %w[btn btn-primary],
+                  onclick: "handleDeleteListItem(arguments[0], this)",
+                  data: { turbo_confirm: t("helpers.dialog.delete", id: author.id) }
+                ) %>
+          </td>
+        </tr>
+  <%- end %>
+      </tbody>
+    </table>
+  </div>
+  <div>
+    <%== pagy_bootstrap_nav(@pagy) %>
+    <%== pagy_limit_selector_js(@pagy, item_name: "Author".pluralize(@pagy.count), id: "pagy-limit-selector") %>
+    <%= link_to(
+          t("view.index.update_item_per_page", model: Author.model_name.human),
+          "javascript:void(0);",
+          onClick: "updateItemPerPage(arguments[0],
+          this)"
+        ) %>
+  </div>
+<% end %>
+  </main>
+</div>

app/views/authors/index.json.jbuilder

@@ -0,0 +1 @@
+json.array! @authors, partial: "authors/author", as: :author

app/views/authors/new.html.erb

@@ -0,0 +1,8 @@
+<h1><%= t("view.new.title", model: Author.model_name.human) %></h1>
+<%= render "form", author: @author %>
+
+<br>
+
+<div>
+  <%= link_to t("view.new.move_to_index", model: Author.model_name.human.pluralize), authors_path %>
+</div>

app/views/authors/show.html.erb

@@ -0,0 +1,16 @@
+<p style="color: green"><%= notice %></p>
+
+<h1><%= Author.model_name.human %></h1>
+
+<%= render @author %>
+
+<div>
+  <%= link_to t("view.show.move_to_update", model: Author.model_name.human), edit_author_path(@author) %> |
+  <%= link_to t("view.show.move_to_index", model: Author.model_name.human.pluralize), authors_path %>
+
+  <%= button_to t("helpers.submit.delete"),
+                @author,
+                method: :delete,
+                class: %w[btn btn-primary],
+                data: { turbo_confirm: t("helpers.dialog.delete", id: @author.id) } %>
+</div>

app/views/authors/show.json.jbuilder

@@ -0,0 +1 @@
+json.partial! "authors/author", author: @author

app/views/book_masters/_form.html.erb

@@ -49,6 +49,18 @@
           ) %>
     </div>
   </div>
+  <div>
+    <%= form.label :author %>
+    <div class="ps-2">
+      <%= form.collection_select(
+            :author_ids,
+            Author.all,
+            :id,
+            :name,
+            { multiple: true }
+          ) %>
+    </div>
+  </div>
   <%- if book_master.persisted? -%>
   <div>
     <%= form.label :created_at, style: "display: block" %>