Integrating Enumeration Types in Fields
To integrate enumeration types into GraphQL schemas, developers define the enum using the enum keyword followed by the enum’s name and its possible values within curly braces. For instance, defining an enum for order status might include values like PENDING, SHIPPED, DELIVERED, and CANCELLED.
type Task {
id: ID!
title: String!
description: String!
status: TaskStatus!
}
enum TaskStatus {
TODO
IN_PROGRESS
DONE
}
Explanation: Here, we define a Task type with fields id, title, description, and status. The status field uses the TaskStatus enum type, which defines three possible values: TODO, IN_PROGRESS, and DONE. This ensures that the status of a task can only be one of these predefined values.
Enumeration Types in GraphQL Schema
In the area of GraphQL schema design, enumeration types play an important role in defining a structured set of values for specific fields. Enumerations serve as a means to restrict the possible options for a field, ensuring data consistency and clarity throughout an API. In this article, we will explore the concept of enumeration types in GraphQL with their importance through practical examples and use cases.