20210216081009_create_restaurants.rb

class CreateRestaurants < ActiveRecord::Migration[6.1]
  def change
    create_table :restaurants do |t|
      t.string :name
      t.integer :rating, null: false, default: 0
      t.string :address

      t.timestamps
    end
  end
end

20210216082443_add_phone_to_restaurants.rb

class AddPhoneToRestaurants < ActiveRecord::Migration[6.1]
  def change
    add_column :restaurants, :phone, :string
  end
end

edit.html.erb

<h1>Edit <%= @restaurant.name %></h1>

<%# Existing object, so build a PUT form to update one %>
<%= form_for @restaurant do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  <br>
  <%= f.label :rating %>
  <%= f.number_field :rating %>
  <br>
  <%= f.submit %>
<% end %>

index.html.erb

<h1>All restaurants</h1>


<ul>
  <% @restaurants.each do |restaurant| %>
    <li>
      <%= link_to restaurant.name, restaurant_path(restaurant) %>
      | <%= link_to "🗑", restaurant_path(restaurant), method: :delete %>
    </li>
  <% end %>
</ul>

new.html.erb

<h1>Submit a restaurant to our app</h1>

<%# Empty object, so build a POST form to create one %>
<%= form_for @restaurant do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  <br>
  <%= f.label :rating %>
  <%= f.number_field :rating %>
  <br>
  <%= f.submit %>
<% end %>

restaurant.rb

class Restaurant < ApplicationRecord
end

restaurants_controller.rb

class RestaurantsController < ApplicationController
  # I Should Never Call Ex Upon Drinking

  def index
    @restaurants = Restaurant.all
  end

  def show
    @restaurant = Restaurant.find(params[:id])
  end

  def new
    # Rails will figure out where to point the form
    # based on the class of that object and MAGIC CONVENTIONS
    @restaurant = Restaurant.new
  end

  def create
    @restaurant = Restaurant.new(restaurant_params)
    @restaurant.save
    redirect_to restaurant_path(@restaurant)
  end

  def edit
    @restaurant = Restaurant.find(params[:id])
  end

  def update
    @restaurant = Restaurant.find(params[:id])
    @restaurant.update(restaurant_params)
    redirect_to restaurant_path(@restaurant)
  end

  def destroy
    @restaurant = Restaurant.find(params[:id])
    @restaurant.destroy
    redirect_to restaurants_path
  end

  private

  # Strong params
  def restaurant_params
    params.require(:restaurant).permit(:name, :rating)
  end
end

routes.rb

Rails.application.routes.draw do
  # get "restaurants", to: "restaurants#index"
  # get "restaurants/new", to: "restaurants#new", as: :new_restaurant
  # get "restaurants/:id", to: "restaurants#show", as: :restaurant
  # post "restaurants", to: "restaurants#create"
  # get "restaurants/:id/edit", to: "restaurants#edit", as: :edit_restaurant
  # put "restaurants/:id", to: "restaurants#update"
  # patch "restaurants/:id", to: "restaurants#update"
  # delete "restaurants/:id", to: "restaurants#destroy"

  resources :restaurants
end

schema.rb

# This file is auto-generated from the current state of the database. Instead
# of editing this file, please use the migrations feature of Active Record to
# incrementally modify your database, and then regenerate this schema definition.
#
# This file is the source Rails uses to define your schema when running `bin/rails
# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
# be faster and is potentially less error prone than running all of your
# migrations from scratch. Old migrations may fail to apply correctly if those
# migrations use external dependencies or application code.
#
# It's strongly recommended that you check this file into your version control system.

ActiveRecord::Schema.define(version: 2021_02_16_082443) do

  create_table "restaurants", force: :cascade do |t|
    t.string "name"
    t.integer "rating", default: 0, null: false
    t.string "address"
    t.datetime "created_at", precision: 6, null: false
    t.datetime "updated_at", precision: 6, null: false
    t.string "phone"
  end

end

show.html.erb

<h1><%= @restaurant.name %></h1>

<div>
  Rated at <%= @restaurant.rating %> stars.
</div>