GraphQL Types

📰 Dev.to · JackTT

Learn how to declare fields in GraphQL and handle null values

intermediate Published 3 Jul 2024

Action Steps

Define a field in your GraphQL schema using the type system
Declare a field as non-nullable by adding an exclamation mark (!) after the type
Use the @nullable directive to specify whether a field can return null
Test your GraphQL schema with sample queries to ensure correct null handling
Configure your resolvers to handle null values and provide default values or error messages

Who Needs to Know This

Backend developers and GraphQL enthusiasts can benefit from understanding field declaration and null handling in GraphQL schema design

Key Insight

💡 In GraphQL, fields can return null by default, but you can declare them as non-nullable or use directives to control nullability