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@@ -47,3 +47,149 @@
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あと投稿とコメントはテーブルを分けたほうがいいですか？
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###追記
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```
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class Post < ApplicationRecord
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has_many :comments, class_name: "Post", foreign_key: parent_id
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belongs_to :post, optional: true, foreign_key: parent_id
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end
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```
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```
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sqlite> .schema posts
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CREATE TABLE "posts" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "title" varchar, "body" text, "parent_id" integer, "user_id" integer, "created_at" datetime NOT NULL, "updated_at" datetime NOT NULL, CONSTRAINT "fk_rails_5b5ddfd518"
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FOREIGN KEY ("user_id")
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REFERENCES "users" ("id")
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);
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CREATE INDEX "index_posts_on_parent_id" ON "posts" ("parent_id");
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CREATE INDEX "index_posts_on_user_id" ON "posts" ("user_id");
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```
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```
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class CreatePosts < ActiveRecord::Migration[5.1]
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def change
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create_table :posts do |t|
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t.string :title
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t.text :body
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t.integer :parent_id
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t.references :user, foreign_key: true
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t.timestamps
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end
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add_index :posts, :parent_id
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end
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end
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```
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```
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class PostsController < ApplicationController
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def index
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end
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def new
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@post = Post.new
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end
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def create
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end
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def show
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end
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end
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```
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```
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Rails.application.routes.draw do
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devise_for :users, controllers: {
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・
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・
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・
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resources :posts
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end
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```
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```
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<%= form_for(@post) do |f| %>
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<div class="field">
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<%= f.label :title %>
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<%= f.text_field :title %>
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<%= f.label :body %>
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<%= f.text_field :body %>
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<%= f.submit "投稿" %>
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</div>
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<% end %>
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```
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