Spring 数据(REST)和@Query:作为参数的可选列表

Spring Data (REST) & @Query: optional list as param

我的一个存储库中有以下功能:

@RestResource(path = "filter", rel = "filter")
@Query("SELECT t "
        + "FROM Trip t "
        + "WHERE "
        + "(:from IS NULL OR t.startTs >= :from) "
        + "AND (:categories IS NULL OR t.category IN :categories) ")
Page<Trip> filter(
        @Param("from") Instant from,
        @Param("categories") List<Category> categories,
        Pageable pageable);

Category 是一个枚举,存储为:

@Enumerated(EnumType.STRING)

Trips table.

当我对一个类别执行 HTTP 请求时,我得到了正确的结果。在没有类别键的情况下执行请求时的行为相同。

htt*://localhost/filter?categories=PRIVATE ==> 好的

htt*://localhost/filter ==> 好的

当使用多个类别时:

htt*://localhost/filter?categories=PRIVATE,BUSINESS

我遇到以下异常:

org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: {vector} [select count(t) FROM foo.bar.services.trips.model.Trip t WHERE (:from IS NULL OR t.startTs >= :from) AND (:categories_0_, :categories_1_ IS NULL OR t.category IN (:categories_0_, :categories_1_)) ]

有人知道我做错了什么吗?

尝试以下方法之一:

1) 尝试将涉及列表的语句括在括号中:

@Query("SELECT t "
        + "FROM Trip t "
        + "WHERE "
        + "(:from IS NULL OR t.startTs >= :from) "
        + "AND ((:categories IS NULL) OR (t.category IN :categories)) ")

2) 将 :categories 括在括号中

t.category IN (:categories)