scaffold products

app/controllers/products_controller.rb

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

app/models/product.rb

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

app/views/products/_form.html.erb

@@ -0,0 +1,27 @@
+<%= form_with(model: product) do |form| %>
+  <% if product.errors.any? %>
+    <div id="error_explanation">
+      <h2><%= pluralize(product.errors.count, "error") %> prohibited this product from being saved:</h2>
+
+      <ul>
+        <% product.errors.each do |error| %>
+          <li><%= error.full_message %></li>
+        <% end %>
+      </ul>
+    </div>
+  <% end %>
+
+  <div class="field">
+    <%= form.label :name %>
+    <%= form.text_field :name %>
+  </div>
+
+  <div class="field">
+    <%= form.label :price %>
+    <%= form.number_field :price %>
+  </div>
+
+  <div class="actions">
+    <%= form.submit %>
+  </div>
+<% end %>

app/views/products/edit.html.erb

@@ -0,0 +1,6 @@
+<h1>Editing Product</h1>
+
+<%= render 'form', product: @product %>
+
+<%= link_to 'Show', @product %> |
+<%= link_to 'Back', products_path %>

app/views/products/index.html.erb

@@ -0,0 +1,29 @@
+<p id="notice"><%= notice %></p>
+
+<h1>Products</h1>
+
+<table>
+  <thead>
+    <tr>
+      <th>Name</th>
+      <th>Price</th>
+      <th colspan="3"></th>
+    </tr>
+  </thead>
+
+  <tbody>
+    <% @products.each do |product| %>
+      <tr>
+        <td><%= product.name %></td>
+        <td><%= product.price %></td>
+        <td><%= link_to 'Show', product %></td>
+        <td><%= link_to 'Edit', edit_product_path(product) %></td>
+        <td><%= link_to 'Destroy', product, method: :delete, data: { confirm: 'Are you sure?' } %></td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>
+
+<br>
+
+<%= link_to 'New Product', new_product_path %>

app/views/products/new.html.erb

@@ -0,0 +1,5 @@
+<h1>New Product</h1>
+
+<%= render 'form', product: @product %>
+
+<%= link_to 'Back', products_path %>

app/views/products/show.html.erb

@@ -0,0 +1,14 @@
+<p id="notice"><%= notice %></p>
+
+<p>
+  <strong>Name:</strong>
+  <%= @product.name %>
+</p>
+
+<p>
+  <strong>Price:</strong>
+  <%= @product.price %>
+</p>
+
+<%= link_to 'Edit', edit_product_path(@product) %> |
+<%= link_to 'Back', products_path %>

config/routes.rb

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

db/migrate/20210307202032_create_products.rb

@@ -0,0 +1,10 @@
+class CreateProducts < ActiveRecord::Migration[6.1]
+  def change
+    create_table :products do |t|
+      t.string :name
+      t.integer :price
+
+      t.timestamps
+    end
+  end
+end