Warning: file_get_contents(/data/phpspider/zhask/data//catemap/2/spring/13.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181

Warning: file_get_contents(/data/phpspider/zhask/data//catemap/0/jpa/2.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
Spring 嵌套投影_Spring_Jpa_Nested_Spring Data - Fatal编程技术网

Spring 嵌套投影

Spring 嵌套投影,spring,jpa,nested,spring-data,Spring,Jpa,Nested,Spring Data,我使用的是SpringData1.13和Spring-boot-starter-Data-jpa-1.5.4。(无法升级) 我只需要获取嵌套实体中的几个字段,并且我有多个可选的搜索条件 public class Entity1 { private Entity2 e2; --> i need e2.innerEntity.field private Entity3 e3; --> i need e3.innerEntity2.field... .... other en

我使用的是SpringData1.13和Spring-boot-starter-Data-jpa-1.5.4。(无法升级)

我只需要获取嵌套实体中的几个字段,并且我有多个可选的搜索条件

public class Entity1 {
   private Entity2 e2; --> i need e2.innerEntity.field
   private Entity3 e3; --> i need e3.innerEntity2.field... 
.... other entity and fields...
}
提取950 Entity1是一项非常缓慢的任务,因为在嵌套实体上急于提取

我尝试过规范,但我不能做投影(或者我不能…)

我能做什么(谢谢你的关注…我对我的英语很抱歉