我有这个代码库:
@Repository
public interface ProductRepository extends JpaRepository<Product, Long>{
@Query("SELECT p.textToSearch as text, count(*) as counter FROM Product p GROUP BY text_to_search ORDER BY counter DESC")
List<TopProductDTO> findTopProducts();
}
TopProductDTO类位于:
public class TopProductDTO {
public TopProductDTO() {}
private String text;
private Integer counter;
// Getters and Setters are omited
}
但是当我执行这段代码时
List<TopProductDTO> topProducts = productRepository.findTopProducts();
它返回一个。
List<Object[]> insted a List<TopProductDTO>
就像每个列是列表中对象数组的索引一样...... Spring Data难道不应该将查询的“text”和“counter”列与TopProductDTO中的字段绑定吗?
结果,我在我的Thymeleaf模板中得到了这个错误:
00:37:22.659 [http-nio-8080-exec-5] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Exception evaluating SpringEL expression: "topProductDTO.text" (products/top:46)] with root cause
org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 14): Property or field 'text' cannot be found on object of type 'java.lang.Object[]' - maybe not public?
我正在使用Spring Boot 1.3.3和Postgres 9.2