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57 lines
4.9 KiB
Plaintext
57 lines
4.9 KiB
Plaintext
---
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title: Vue d'ensemble
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description: Configurer l'application elle-même — son identité, ses autorisations par défaut et ce qui s'exécute au moment de l'installation.
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icon: screwdriver-wrench
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---
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La **couche de configuration** d'une application Twenty est ce qui décrit l'application *à la plateforme* — son identité, les autorisations qu'elle détient et le code qui s'exécute lors de l'installation ou de la mise à niveau. Ces déclarations n'ajoutent pas de nouvelles structures de données ni de comportement à l'exécution ; elles indiquent à Twenty *qui est l'application* et *comment la configurer*.
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```text
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┌────────────────────────────────────────────────────────┐
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│ Application — identity, default role, variables, │
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│ marketplace metadata │
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│ │
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│ ┌──────────────────────────────────────────────────┐ │
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│ │ Role — what the app's logic functions can read │ │
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│ │ and write (referenced by Application) │ │
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│ └──────────────────────────────────────────────────┘ │
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└────────────────────────────────────────────────────────┘
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│
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▼ (at install / upgrade time)
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┌──────────────────────────────────┐
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│ Pre-install hook │ before metadata migration
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└──────────────────────────────────┘
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┌──────────────────────────────────┐
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│ Post-install hook │ after metadata migration
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└──────────────────────────────────┘
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│
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▼ (at uninstall time)
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┌──────────────────────────────────┐
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│ Uninstall hook │ before app removal
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└──────────────────────────────────┘
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```
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## Dans cette section
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<CardGroup cols={2}>
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<Card title="Configuration de l'application" icon="rocket" href="/l/fr/developers/extend/apps/config/application">
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`defineApplication` — identité, rôle par défaut, variables, métadonnées de la marketplace.
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</Card>
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<Card title="Rôles et autorisations" icon="shield-halved" href="/l/fr/developers/extend/apps/config/roles">
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`defineRole` — déclarez ce que les fonctions logiques de votre application peuvent lire et écrire.
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</Card>
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<Card title="Hooks d'installation" icon="wrench" href="/l/fr/developers/extend/apps/config/install-hooks">
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`definePreInstallLogicFunction`, `definePostInstallLogicFunction` et `defineUninstallLogicFunction` — sauvegarder les données, préremplir les valeurs par défaut, valider les mises à niveau, nettoyer lors de la suppression.
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</Card>
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</CardGroup>
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## Comment les éléments s'articulent
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* L'**application** est le point d'entrée. Chaque application comporte exactement un appel à `defineApplication()` qui pointe vers un **Rôle** par défaut.
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* Le **Rôle** contrôle ce que les fonctions logiques et les composants frontaux de l'application peuvent lire et écrire. Suivez le principe du moindre privilège : accordez uniquement les autorisations dont votre code a réellement besoin.
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* Les **hooks d'installation** s'exécutent lors de l'installation ou de la mise à niveau — la pré-installation avant la migration des métadonnées (ce qui permet de refuser une mise à niveau risquée), la post-installation après la migration (ce qui permet de préremplir les données par défaut selon le nouveau schéma). Le hook de désinstallation s’exécute juste avant que l’application ne soit supprimée, ce qui lui permet de nettoyer les ressources externes tant que les données de l’application sont encore lisibles.
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<Note>
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Les hooks d'installation partagent l'environnement d'exécution des [fonctions logiques](/l/fr/developers/extend/apps/logic/logic-functions) — même signature de handler, mêmes variables d'environnement, même client d'API typé — mais ils sont déclarés avec leurs propres fonctions `define` et vivent en dehors du modèle de déclencheurs habituel (HTTP, cron, événements de base de données).
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</Note>
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