Graphql 返回枚举集合

Question

我想使用 graphql 返回枚举的所有值。我有schema：

schema {
    query: Query
}
type Query {
    getDataTypes: [DictionaryType]
}

enum DictionaryType{
   RISK
   SALES_CHANNEL
   PERSON_TYPE
}

我们有正常的java枚举：

public enum DictionaryType {
    RISK,
    SALES_CHANNEL,
    PERSON_TYPE
}

和配置Controller：

public class DictionaryController {
    @Value("classpath:items.graphqls")
    private Resource schemaResource;
    private GraphQL graphQL;
    private final DictionaryService dictionaryService;
    @PostConstruct
    public void loadSchema() throws IOException {
        File schemaFile = schemaResource.getFile();
        TypeDefinitionRegistry registry = new SchemaParser().parse(schemaFile);
        RuntimeWiring wiring = buildWiring();
        GraphQLSchema schema = new SchemaGenerator().makeExecutableSchema(registry, wiring);
        graphQL = GraphQL.newGraphQL(schema).build();
    }
    private RuntimeWiring buildWiring() {
        DataFetcher<Set<DictionaryType>> fetcher3 = dataFetchingEnvironment -> {
            return dictionaryService.getDictionaryTypes();
        };
        return RuntimeWiring.newRuntimeWiring().type("Query", typeWriting ->
            typeWriting
                    .dataFetcher("getDataTypes", fetcher3))
                    .build();
    }
    @PostMapping("getDataTypes")
    public ResponseEntity<Object> getDataTypes(@RequestBody String query) {
        ExecutionResult result = graphQL.execute(query);
        return new ResponseEntity<Object>(result, HttpStatus.OK);
    }
}   

当我POST http://localhost:50238/getDataTypes带身体：

{
    getDataTypes {
    }
}

我得到"errorType": "InvalidSyntax",作为回应。

Answer 1

这是一个无效的查询，因为您的大括号没有内容（即 { }）。不过，您的架构表明查询应该简单得多：

{ getDataTypes }