scaffold posts

app/controllers/posts_controller.rb

@@ -0,0 +1,69 @@
+class PostsController < ApplicationController
+  before_action :set_post, only: %i[ show edit update destroy ]
+
+  # GET /posts or /posts.json
+  def index
+    @posts = Post.all
+  end
+
+  # GET /posts/1 or /posts/1.json
+  def show
+  end
+
+  # GET /posts/new
+  def new
+    @post = Post.new
+  end
+
+  # GET /posts/1/edit
+  def edit
+  end
+
+  # POST /posts or /posts.json
+  def create
+    @post = Post.new(post_params)
+
+    respond_to do |format|
+      if @post.save
+        format.html { redirect_to @post, notice: "Post was successfully created." }
+        format.json { render :show, status: :created, location: @post }
+      else
+        format.html { render :new, status: :unprocessable_entity }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /posts/1 or /posts/1.json
+  def update
+    respond_to do |format|
+      if @post.update(post_params)
+        format.html { redirect_to @post, notice: "Post was successfully updated." }
+        format.json { render :show, status: :ok, location: @post }
+      else
+        format.html { render :edit, status: :unprocessable_entity }
+        format.json { render json: @post.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /posts/1 or /posts/1.json
+  def destroy
+    @post.destroy
+    respond_to do |format|
+      format.html { redirect_to posts_url, notice: "Post was successfully destroyed." }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_post
+      @post = Post.find(params[:id])
+    end
+
+    # Only allow a list of trusted parameters through.
+    def post_params
+      params.require(:post).permit(:title, :content, :premium)
+    end
+end

app/models/post.rb

@@ -0,0 +1,2 @@
+class Post < ApplicationRecord
+end

app/views/posts/_form.html.erb

@@ -0,0 +1,32 @@
+<%= form_with(model: post) do |form| %>
+  <% if post.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(post.errors.count, "error") %> prohibited this post from being saved:</h2>
+
+      <ul>
+        <% post.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= form.label :title %>
+    <%= form.text_field :title %>
+  </div>
+
+  <div class="field">
+    <%= form.label :content %>
+    <%= form.text_area :content %>
+  </div>
+
+  <div class="field">
+    <%= form.label :premium %>
+    <%= form.check_box :premium %>
+  </div>
+
+  <div class="actions">
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/posts/edit.html.erb

@@ -0,0 +1,6 @@
+<h1>Editing Post</h1>
+
+<%= render 'form', post: @post %>
+
+<%= link_to 'Show', @post %> |
+<%= link_to 'Back', posts_path %>

app/views/posts/index.html.erb

@@ -0,0 +1,31 @@
+<p id="notice"><%= notice %></p>
+
+<h1>Posts</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Title</th>
+      <th>Content</th>
+      <th>Premium</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @posts.each do |post| %>
+      <tr>
+        <td><%= post.title %></td>
+        <td><%= post.content %></td>
+        <td><%= post.premium %></td>
+        <td><%= link_to 'Show', post %></td>
+        <td><%= link_to 'Edit', edit_post_path(post) %></td>
+        <td><%= link_to 'Destroy', post, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Post', new_post_path %>

app/views/posts/new.html.erb

@@ -0,0 +1,5 @@
+<h1>New Post</h1>
+
+<%= render 'form', post: @post %>
+
+<%= link_to 'Back', posts_path %>

app/views/posts/show.html.erb

@@ -0,0 +1,19 @@
+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Title:</strong>
+  <%= @post.title %>
+</p>
+
+<p>
+  <strong>Content:</strong>
+  <%= @post.content %>
+</p>
+
+<p>
+  <strong>Premium:</strong>
+  <%= @post.premium %>
+</p>
+
+<%= link_to 'Edit', edit_post_path(@post) %> |
+<%= link_to 'Back', posts_path %>

config/routes.rb

@@ -1,3 +1,4 @@
 Rails.application.routes.draw do
+  resources :posts
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
 end

db/migrate/20210311211518_create_posts.rb

@@ -0,0 +1,11 @@
+class CreatePosts < ActiveRecord::Migration[6.1]
+  def change
+    create_table :posts do |t|
+      t.string :title, null: false
+      t.text :content
+      t.boolean :premium
+
+      t.timestamps
+    end
+  end
+end