From eb3d317a5c8d2d93035504b4de2b13b7c9188f7a Mon Sep 17 00:00:00 2001
From: Karim Bogtob <karim.bogtob@datadoghq.com>
Date: Sun, 26 Mar 2023 16:12:58 +0200
Subject: [PATCH] 2.6C - Mettre a jour les vieilles creatures

---
 README.md                                     | 19 +++++++++++++++++++
 .../20230326140943_set_size_on_creatures.rb   | 15 +++++++++++++++
 db/schema.rb                                  |  2 +-
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 db/migrate/20230326140943_set_size_on_creatures.rb

diff --git a/README.md b/README.md
index fc9b6b6..bca034a 100644
--- a/README.md
+++ b/README.md
@@ -91,4 +91,23 @@ irb(main):001:0> Creature.create(name: 'Big Chongus', health_points: 25)
 
 Toutes les créatures crées auront dorénavant une taille. 
 
+Maintenant il faut faire une migration pour mettre à jour celles en base.
 
+* `rails g migration SetSizeOnCreatures`
+
+* Après avoir écrit la mise à jour, j'applique avec : `rails db:migrate`
+
+* Je teste en console en regardant une vieille créature : 
+
+```ruby
+irb(main):012:0> Creature.first
+  Creature Load (0.5ms)  SELECT "creatures".* FROM "creatures" ORDER BY "creatures"."id" ASC LIMIT ?  [["LIMIT", 1]]
+=>
+#<Creature:0x0000000138c856e8
+ id: 1,
+ name: "Thrall",
+ health_points: 489,
+ created_at: Sun, 26 Mar 2023 13:19:57.492017000 UTC +00:00,
+ updated_at: Sun, 26 Mar 2023 14:11:33.479248000 UTC +00:00,
+ size: "giant">
+```
\ No newline at end of file
diff --git a/db/migrate/20230326140943_set_size_on_creatures.rb b/db/migrate/20230326140943_set_size_on_creatures.rb
new file mode 100644
index 0000000..0e7ceb6
--- /dev/null
+++ b/db/migrate/20230326140943_set_size_on_creatures.rb
@@ -0,0 +1,15 @@
+class SetSizeOnCreatures < ActiveRecord::Migration[7.0]
+  def change
+    Creature.all.each do |creature|
+      creature.size = case creature.health_points
+        when 0..10
+          :small
+        when 11..30
+          :big
+        else
+          :giant
+      end
+      creature.save!
+    end    
+  end 
+end
diff --git a/db/schema.rb b/db/schema.rb
index b9099e8..4104bde 100644
--- a/db/schema.rb
+++ b/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_03_26_140343) do
+ActiveRecord::Schema[7.0].define(version: 2023_03_26_140943) do
   create_table "creatures", force: :cascade do |t|
     t.string "name"
     t.integer "health_points"