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57 lines
4.6 KiB
Plaintext
57 lines
4.6 KiB
Plaintext
---
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title: Übersicht
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description: Konfigurieren Sie die App selbst – ihre Identität, Standardberechtigungen und das, was zur Installationszeit ausgeführt wird.
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icon: screwdriver-wrench
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---
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Die **Konfigurationsebene** einer Twenty-App beschreibt die App *für die Plattform* – ihre Identität, die Berechtigungen, die sie hält, und den Code, der während der Installation oder Aktualisierung ausgeführt wird. Diese Deklarationen fügen keine neuen Datentypen oder Laufzeitverhalten hinzu; sie teilen Twenty mit, *wer die App ist* und *wie sie eingerichtet werden soll*.
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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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## In diesem Abschnitt
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<CardGroup cols={2}>
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<Card title="App-Konfiguration" icon="rocket" href="/l/de/developers/extend/apps/config/application">
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`defineApplication` – Identität, Standardrolle, Variablen, Marketplace-Metadaten.
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</Card>
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<Card title="Rollen & Berechtigungen" icon="shield-halved" href="/l/de/developers/extend/apps/config/roles">
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`defineRole` – deklariert, was die Logikfunktionen Ihrer App lesen und schreiben können.
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</Card>
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<Card title="Installations-Hooks" icon="wrench" href="/l/de/developers/extend/apps/config/install-hooks">
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`definePreInstallLogicFunction`, `definePostInstallLogicFunction` und `defineUninstallLogicFunction` – Daten sichern, Standardwerte befüllen, Aktualisierungen validieren, beim Entfernen aufräumen.
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</Card>
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</CardGroup>
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## Wie die Bausteine zusammenhängen
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* **Application** ist der Einstiegspunkt. Jede App hat genau einen `defineApplication()`-Aufruf, und dieser verweist auf eine **Rolle** als Standard.
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* Die **Rolle** steuert, was die Logikfunktionen und Frontend-Komponenten der App lesen und schreiben können. Folgen Sie dem Prinzip der geringsten Privilegien: Gewähren Sie nur die Berechtigungen, die Ihr Code tatsächlich benötigt.
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* **Install Hooks** laufen während der Installation oder Aktualisierung – Pre-Install vor der Metadatenmigration (so kann ein riskantes Upgrade abgelehnt werden), Post-Install nach der Migration (so können Standarddaten gegen das neue Schema befüllt werden). Der Uninstall-Hook wird direkt ausgeführt, bevor die App entfernt wird, sodass er externe Ressourcen bereinigen kann, während die Daten der App noch lesbar sind.
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<Note>
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Installations-Hooks nutzen die Laufzeit der [Logikfunktion](/l/de/developers/extend/apps/logic/logic-functions) – gleiche Handler-Signatur, gleiche Umgebungsvariablen, gleicher typisierter API-Client –, werden aber mit ihren eigenen Define-Funktionen deklariert und leben außerhalb des regulären Trigger-Modells (HTTP, Cron, Datenbankereignisse).
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</Note>
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