2.5 - Scope alive

README.md

@@ -40,3 +40,29 @@ Question 3.2 :
 
 * `rails db:seed`
 
+## TP4
+
+Question 2.5 :
+
+* J'ajoute une créature avec des PVs à 0 :
+
+```ruby
+❯ rails console
+Loading development environment (Rails 7.0.4.3)
+irb(main):001:0> Creature.create(name: 'Zombie', health_points: 0)
+  TRANSACTION (0.1ms)  begin transaction
+  Creature Create (0.4ms)  INSERT INTO "creatures" ("name", "health_points", "created_at", "updated_at") VALUES (?, ?, ?, ?)  [["name", "Zombie"], ["health_points", 0], ["created_at", "2023-03-26 14:00:56.413028"], ["updated_at", "2023-03-26 14:00:56.413028"]]
+  TRANSACTION (0.9ms)  commit transaction
+=>
+#<Creature:0x00000001104b9310
+ id: 27,
+ name: "Zombie",
+ health_points: 0,
+ created_at: Sun, 26 Mar 2023 14:00:56.413028000 UTC +00:00,
+ updated_at: Sun, 26 Mar 2023 14:00:56.413028000 UTC +00:00>
+```
+
+* J'essaie de renommer la créature dans postman et je vérifie que son nom ne change pas
+
+* J'ai bien une 404 et son nom n'a pas changé
+

app/controllers/creatures_controller.rb

@@ -21,7 +21,7 @@ class CreaturesController < ApplicationController
   end
 
   def update
-    @creature = Creature.find(params[:id])
+    @creature = Creature.alive.find(params[:id])
     @creature.update!(create_or_update_params)
     render json: @creature.as_json(only: SHOWABLE_ATTRIBUTES)
   rescue ActiveRecord::RecordNotFound

app/models/creature.rb

@@ -1,4 +1,6 @@
 class Creature < ApplicationRecord
+  scope :alive, -> { where('health_points > 0') }
+
   def to_label
     "#{name} (#{health_points})"
   end