5.11-12 implemented migration

app/controllers/styles_controller.rb

@@ -0,0 +1,2 @@
+class StylesController < ApplicationController
+end

app/helpers/styles_helper.rb

@@ -0,0 +1,2 @@
+module StylesHelper
+end

app/models/beer.rb

@@ -6,7 +6,7 @@ class Beer < ApplicationRecord
   has_many :users, through: :ratings
 
   validates :name, presence: true
-  validates :style, presence: true
+  validates :style_id, presence: true
 
   def to_s
     "#{name}, #{(Brewery.find_by_id brewery_id).name}"

app/models/style.rb

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

db/migrate/20231120133953_create_styles.rb

@@ -0,0 +1,52 @@
+class CreateStyles < ActiveRecord::Migration[7.0]
+  def self.up
+    create_table :styles do |t|
+      t.index :id
+      t.text :name
+
+      t.timestamps
+    end
+
+    change_table :beers do |t|
+      t.rename :style, :old_style
+      t.references :style
+    end
+
+    Beer.all.each do |beer|
+      style = Style.find_by name: beer.old_style
+      if style.nil?
+        Style.create name: beer.old_style
+      end
+    end
+
+    Beer.all.each do |beer|
+      style = Style.find_by name: beer.old_style
+
+      if style.nil?
+        Beer.update beer.id, { :style_id => 1 }
+      else
+        Beer.update beer.id, { :style_id => style.id }
+      end
+    end
+
+    remove_column :beers, :old_style
+  end
+
+  def self.down
+    add_column :beers, :style, :text
+
+    Beer.all.each do |beer|
+      style = Style.find_by id: beer.style_id
+      if style.nil?
+        Beer.update beer.id, { :style => "IPA" }
+      else
+        Beer.update beer.id, { :style => style.name }
+      end
+    end
+
+    remove_column :beers, :style_id
+    remove_column :beers, :old_style
+
+    drop_table :styles
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_08_10_180821) do
+ActiveRecord::Schema[7.0].define(version: 2023_11_20_133953) do
   create_table "beerclubs", force: :cascade do |t|
     t.string "name"
     t.integer "founded"
@@ -21,10 +21,11 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_10_180821) do
 
   create_table "beers", force: :cascade do |t|
     t.string "name"
-    t.string "style"
     t.integer "brewery_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "style_id"
+    t.index ["style_id"], name: "index_beers_on_style_id"
   end
 
   create_table "breweries", force: :cascade do |t|
@@ -49,6 +50,13 @@ ActiveRecord::Schema[7.0].define(version: 2023_08_10_180821) do
     t.integer "user_id"
   end
 
+  create_table "styles", force: :cascade do |t|
+    t.text "name"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["id"], name: "index_styles_on_id"
+  end
+
   create_table "users", force: :cascade do |t|
     t.string "username"
     t.datetime "created_at", null: false