SubSelectionRequired 类型的验证错误：字段时间戳类型需要子选择答案

【问题标题】：Validation error of type SubSelectionRequired: Sub selection required for type Timestamp of fieldSubSelectionRequired 类型的验证错误：字段时间戳类型需要子选择
【发布时间】：2019-09-20 12:09:59
【问题描述】：

我使用 GraphQL-SPQR 库问题是“SubSelectionRequired 类型的验证错误：Timestamp 类型需要子选择” 时间戳查询中可能有表达式或Entity中的格式

{"query":
"{findUserPointByUserId(userId:73){rowNum userAccountPointUserId totalPoint pointTypeDescription point userAccountCreatedDate} findUserAccountImgByUserId(userId:73){imageId,userId,presentImgNum}}"


}

错误

{
    "errors": [
        {
            "message": "Validation error of type SubSelectionRequired: Sub selection required for type Timestamp of field userAccountCreatedDate",
            "locations": [
                {
                    "line": 1,
                    "column": 103
                }
            ]
        }
    ]
}

实体

@NoArgsConstructor
@AllArgsConstructor
@Getter
@Setter
@Entity
@Table(name = "view_user_account_point", schema = "public", catalog = "corus")
public class ViewUserAccountPoint {
    @Id
    @Basic
    @GraphQLQuery(name = "rowNum")
    @Column(name = "row_num", nullable = true)
    private Long rowNum;

    @Basic
    @Column(name = "user_account_point_userid", nullable = true)
    @GraphQLQuery(name = "userAccountPointUserId")
    private Integer userAccountPointUserId;

    @Basic
    @Column(name = "subject_id", nullable = true)
    @GraphQLQuery(name = "subjectId")
    private Integer subjectId;

    @Basic
    @Column(name = "point", nullable = true)
    @GraphQLQuery(name = "point")
    private Integer point;

    @Basic
    @Column(name = "user_account_point_typeid", nullable = true)
    @GraphQLQuery(name = "userAccountPointTypeId")
    private Integer userAccountPointTypeId;

    @Basic
    @Column(name = "date_created", nullable = true)
    @GraphQLQuery(name = "userAccountCreatedDate")
    private Timestamp userAccountCreatedDate;

服务

public List<ViewUserAccountPoint> findUserPointByUserId(@GraphQLArgument(name = "userId") Integer userId){
        return viewUserAccountPointRepository.findByUserAccountPointUserIdOrderByUserAccountCreatedDateDesc(userId);
    }

控制器

 private final GraphQL graphQL;

    public UserController(UserAccountService userAccountService) {
        GraphQLSchema schema = new GraphQLSchemaGenerator()
                .withResolverBuilders(
                        //Resolve by annotations
                        new AnnotatedResolverBuilder())
                .withOperationsFromSingleton(userAccountService,UserAccountService.class)
                .withValueMapperFactory(new JacksonValueMapperFactory())
                .generate();
        graphQL = GraphQL.newGraphQL(schema).build();
    }

    @PostMapping(value = "/graphql", consumes = MediaType.APPLICATION_JSON_UTF8_VALUE, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
    @ResponseBody
    public Map<String, Object> graphql(@RequestBody Map<String, String> request, HttpServletRequest raw) {
        ExecutionResult executionResult = graphQL.execute(ExecutionInput.newExecutionInput()
                .query(request.get("query"))
                .operationName(request.get("operationName"))
                .context(raw)
                .build());
        return executionResult.toSpecification();
    }

我搜索所有查询时间戳格式但是，我找不到我希望听到解决方案。谢谢

【问题讨论】：

标签： java json spring-boot graphql graphql-spqr

【解决方案1】：

出于某种原因，Timestamp 的映射不正确。它最终成为一个对象而不是一个标量。正如the issue you opened 中所提到的，您的代码中的Timestamp 来自何处尚不清楚。

java.sql.Timestamp 在 GraphQL SPQR 的最新版本中是 supported out of the box，因此您可能使用的是旧版本。

如果不是这样，则意味着Timestamp 不是java.sql.Timestamp，您需要为其注册一个自定义映射器。

public class TimestampMapper implements TypeMapper {

    // Define the scalar as needed, see io.leangen.graphql.util.Scalars for inspiration
    private static final GraphQLScalarType TIMESTAMP = ...;

    @Override
    public GraphQLOutputType toGraphQLType(AnnotatedType javaType, OperationMapper operationMapper, Set<Class<? extends TypeMapper>> mappersToSkip, BuildContext buildContext) {
        return TIMESTAMP; //it's important to always return the same instance
    }

    @Override
    public GraphQLInputType toGraphQLInputType(AnnotatedType javaType, OperationMapper operationMapper, Set<Class<? extends TypeMapper>> mappersToSkip, BuildContext buildContext) {
        return TIMESTAMP; //same as above
    }

    @Override
    public boolean supports(AnnotatedType type) {
        return ClassUtils.isSuperClass(Timestamp.class, type);
    }
}

然后注册你的映射器：

generator.withTypeMappers(new TimestampMapper())

【讨论】：

【解决方案2】：

对于我的情况，查询正文不正确，请确保您有正确的。

【讨论】：