October 2020
Intermediate to advanced
202 pages
4h 25m
German
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9Implementierung mit Java II: Erweitertes Schema und Mutationen
Nach der Erstellung eines ersten Schemas im vorherigen Kapitel wird im Folgenden tiefer in die Möglichkeiten mit GraphQL eingeführt: Neben eigenen Datentypen werden auch Geschäftslogik-Felder implementiert.
Anschließend wird über die Schema-Modularisierung eine bessere Übersicht in der Projektstruktur zur Entwicklung des API erstellt. Diese Übersicht wird auch direkt getestet. Denn das aufgeteilte Schema wird anschließend um diverse Interaktionsmöglichkeiten aus dem Use Case erweitert und führt damit in die Java-spezifische Implementierung von Mutationen ein.
Der komplette Code befindet sich auch vollständig auf GitHub [38].
9.1Selbstdefinierte Skalar- und Geschäftslogik-Felder
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