如何在 GraphQL 架构中指定日期时间？

Question

I am building my GraphQL schema for my project and one of my models has a DateTime format.

How do I write out date formats on my GraphQL schema?

I tried DateTime or Date but nothing shows up.

This is the model:

public Integer Id;
public String name;
public String description;
public LocalDate birthDate;

This is what's in my GraphQL schema:

type Pet {
    id: ID!
    name: String!
    description: String
    birthDate: DateTime
} 

But it says:

Unknown type DateTime

Answer 1

Create a custom scalar for your types that is not recognized by your framework.

I am not sure which graphql-java based framework you are using. I assume you are using the official Spring for GraphQL from Spring team.

1. Create a custom scalar, eg my LocalDateTime scalar .
2. Register it in your custom RuntimeWiring bean, check here .

If you are using Saclars in other graphql-java based frameworks(GraphQL Java, GraphQL Java Kickstart, GraphQL Kotlin, GraphQL SPQR, Netflix DGS etc) and spring integrations, check my Spring GraphQL Sample . The back-end principle is similar, just some different config.