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# README
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Commandes lancées :
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Question 2.2 :
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* `rails server`
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Question 2.3 :
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* `rails generate controller HomeController`
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Question 3 :
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* `rails generate model Creature name:string health_points:integer`
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* La migration n'est pas lancée sur la base
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* `rails db:migrate`
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Question 3.1 :
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Je teste la creature dans une console rails que je lance avec `rails console` :
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```ruby
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❯ rails console
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Loading development environment (Rails 7.0.4.3)
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irb(main):001:0> c = Creature.create(name: "Thrall", health_points: 489)
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TRANSACTION (0.1ms) begin transaction
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Creature Create (0.4ms) INSERT INTO "creatures" ("name", "health_points", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["name", "Thrall"], ["health_points", 489], ["created_at", "2023-03-26 13:19:57.492017"], ["updated_at", "2023-03-26 13:19:57.492017"]]
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TRANSACTION (0.9ms) commit transaction
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=>
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#<Creature:0x00000001070374f8
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...
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irb(main):002:0> c.to_label
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=> "Thrall (489)"
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```
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Question 3.2 :
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* `bundle add random_name_generator` pour ajouter la gemme au gemfile, effectuer la résolution de dépendance et installer la nouvelle gemme
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* `rails db:seed`
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## TP4
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Question 2.5 :
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* J'ajoute une créature avec des PVs à 0 :
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```ruby
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❯ rails console
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Loading development environment (Rails 7.0.4.3)
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irb(main):001:0> Creature.create(name: 'Zombie', health_points: 0)
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TRANSACTION (0.1ms) begin transaction
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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"]]
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TRANSACTION (0.9ms) commit transaction
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=>
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#<Creature:0x00000001104b9310
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id: 27,
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name: "Zombie",
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health_points: 0,
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created_at: Sun, 26 Mar 2023 14:00:56.413028000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:00:56.413028000 UTC +00:00>
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```
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* J'essaie de renommer la créature dans postman et je vérifie que son nom ne change pas
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* J'ai bien une 404 et son nom n'a pas changé
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Question 2.6 :
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* Je génère la migration avec `rails g migration AddSizeColumnToCreatures size:integer`
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* `rails db:migrate`
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* J'ajoute le callback comme dans le sujet du TP pour setter la size à la création, je teste en console :
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```ruby
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irb(main):001:0> Creature.create(name: 'Big Chongus', health_points: 25)
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TRANSACTION (0.1ms) begin transaction
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Creature Create (0.4ms) INSERT INTO "creatures" ("name", "health_points", "created_at", "updated_at", "size") VALUES (?, ?, ?, ?, ?) [["name", "Big Chongus"], ["health_points", 35], ["created_at", "2023-03-26 14:07:03.876318"], ["updated_at", "2023-03-26 14:07:03.876318"], ["size", 2]]
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TRANSACTION (0.6ms) commit transaction
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=>
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#<Creature:0x0000000109a96d70
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id: 28,
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name: "Big Chongus",
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health_points: 25,
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created_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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size: "big">
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```
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Toutes les créatures crées auront dorénavant une taille.
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Maintenant il faut faire une migration pour mettre à jour celles en base.
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* `rails g migration SetSizeOnCreatures`
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* Après avoir écrit la mise à jour, j'applique avec : `rails db:migrate`
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* Je teste en console en regardant une vieille créature :
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```ruby
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irb(main):012:0> Creature.first
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Creature Load (0.5ms) SELECT "creatures".* FROM "creatures" ORDER BY "creatures"."id" ASC LIMIT ? [["LIMIT", 1]]
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=>
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#<Creature:0x0000000138c856e8
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id: 1,
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name: "Thrall",
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health_points: 489,
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created_at: Sun, 26 Mar 2023 13:19:57.492017000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:11:33.479248000 UTC +00:00,
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size: "giant">
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```
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Question 3 :
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* Je génère la migration pour ajouter les combats avec : `rails g migration CreateCombat result:integer name:string left_fighter:references right_fighter:references winner:references`
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Cette migration sera pré-chargée avec :
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```ruby
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class CreateCombat < ActiveRecord::Migration[7.0]
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def change
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create_table :combats do |t|
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t.integer :result
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t.string :name
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t.references :left_fighter, null: false, foreign_key: true
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t.references :right_fighter, null: false, foreign_key: true
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t.references :winner, null: false, foreign_key: true
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t.timestamps
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end
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end
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end
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```
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Il va falloir préciser vers quelle table doit pointer la foreign key, pour ça on remplace `foreign_key: true` par `foreign_key: { to_table: 'creatures' }`.
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On remplacera aussi le `null: false` de la référence `winner` pour supporter de ne pas en avoir.
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Question 3.1 :
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On ajoute la méthode baston! sur les combats et on teste en console. La méthode modifie les instances de créature mais ne sauvegarde pas.
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Pour une domination :
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```ruby
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❯ rails console
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Loading development environment (Rails 7.0.4.3)
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irb(main):001:0> c1 = Creature.first
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...
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irb(main):003:0> c1.to_label
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=> "Thrall (489)"
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irb(main):004:0> c2 = Creature.last
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...
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irb(main):005:0> c2.to_label
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=> "Big Chongus (35)"
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irb(main):006:0> combat = Combat.new(name: "L'orc vs le lapin", left_fighter: c1, right_fighter: c2)
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=> #<Combat:0x0000000111817d58 id: nil, result: nil, name: "L'orc vs le lapin", left_fighter_id: 1, right_fighter_id: 28, winner_id: nil, created_at: nil, updated_at: nil>
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irb(main):007:0> combat.baston!
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=> :domination
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irb(main):008:0> combat.winner
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=>
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#<Creature:0x00000001274b5e60
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id: 1,
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name: "Thrall",
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health_points: 454,
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created_at: Sun, 26 Mar 2023 13:19:57.492017000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:11:33.479248000 UTC +00:00,
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size: "giant">
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irb(main):009:0> combat.right_fighter
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=>
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#<Creature:0x00000001274bffa0
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id: 28,
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name: "Big Chongus",
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health_points: 0,
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created_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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size: "giant">
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```
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Pour un draw :
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```ruby
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irb(main):011:0> c2.reload # permet de recharger le record depuis la base
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...
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=>
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#<Creature:0x00000001274bffa0
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id: 28,
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name: "Big Chongus",
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health_points: 35,
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created_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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updated_at: Sun, 26 Mar 2023 14:07:03.876318000 UTC +00:00,
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size: "giant">
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irb(main):012:0> c3 = Creature.create!(name: "Big Chungus", health_points: 35)
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...
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irb(main):013:0> combat2 = Combat.new(name: "Le fake vs le vrai", left_fighter: c2, right_fighter: c3)
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=> #<Combat:0x00000001077212a0 id: nil, result: nil, name: "Le fake vs le vrai", left_fighter_id: 28, right_fighter_id: 29, winner_id: nil, created_at: nil, updated_at: ...
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irb(main):014:0> combat2.baston!
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=> :draw
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irb(main):015:0> combat2.winner
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=> nil
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irb(main):016:0> c2.to_label
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=> "Big Chongus (0)"
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irb(main):017:0> c3.to_label
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=> "Big Chungus (0)"
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```
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