期望延迟加载不应该在事务范围之外工作(例如在rest控制器中),但它可以工作。
问题出在@ transmitting**中,我配置中的spring应用没有使用,怎么解决?
. Rest控制器没有任何transactional方法,它只使用specifiedServices来加载实体。如果没有在service中加载依赖集合,则应该为空。
应用程序启动器类:
@SpringBootApplication
@EntityScan("com.vl.pmanager.domain.model")
@EnableJpaRepositories("com.vl.pmanager.domain.repository")
@EnableTransactionManagement
public class ProjectManagerApplication {
public static void main(String[] args) {
SpringApplication.run(ProjectManagerApplication.class, args);
}
}
字符串
我知道spring Boot 会自动配置仓库和扫描实体,但我希望添加.
@EntityScan("com.vl.pmanager.domain.model")
@EnableJpaRepositories("com.vl.pmanager.domain.repository")
型
我还尝试将 *@ translation * 添加到仓库接口,但它对我不起作用
package com.vl.pmanager.domain.repository;
import com.vl.pmanager.domain.model.Tag;
import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
@Repository
@Transactional
public interface TagRepository extends PagingAndSortingRepository<Tag, Long> {
}
型
因此,我从仓库中删除了 *@ translation *,创建了其他服务层来使用注解管理它,并将服务注入到控制器:
package com.vl.pmanager.domain.db.service.api;
import com.vl.pmanager.domain.model.Tag;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
public interface ITagManager {
Page<Tag> findAll(Pageable pageable);
Tag findOne(Long id);
}
// ======================== TAG SERVICE WRAPPED WITH TRANSACTION ==========================
package com.vl.pmanager.domain.db.service;
import com.vl.pmanager.domain.db.service.api.ITagManager;
import com.vl.pmanager.domain.model.Tag;
import com.vl.pmanager.domain.repository.TagRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service
@Transactional
public class TagManager implements ITagManager {
@Autowired
private TagRepository tagRepository;
@Override
public Page<Tag> findAll(Pageable pageable) {
return tagRepository.findAll(pageable);
}
@Override
public Tag findOne(Long id) {
return tagRepository.findOne(id);
}
}
// ====================== REST CONTROLLER ============================
package com.vl.pmanager.web;
import com.vl.pmanager.domain.db.service.api.ITagManager;
import com.vl.pmanager.domain.model.Tag;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping(value = "/tags")
public class TagController {
private static final int DEFAULT_PAGE_SIZE = 50;
@Autowired
private ITagManager tagManager;
@RequestMapping(method = RequestMethod.GET, consumes = MediaType.ALL_VALUE)
public Page<Tag> getTags(@PageableDefault(size = DEFAULT_PAGE_SIZE) Pageable pageable) {
return tagManager.findAll(pageable);
}
@RequestMapping(value = "/{id}", method = RequestMethod.GET, consumes = MediaType.ALL_VALUE)
public Tag getTag(@PathVariable("id") Long id) {
return tagManager.findOne(id);
}
}
型
标记实体有一个字段 Set projectInfo Map到其他实体,该实体具有 @ManyToMany 关系,带有 FetchType fetch()default LAZY;,因此返回结果不能包含依赖实体,但它确实包含。
我还监视了DB日志:
// make request - load data using db service to controller level
Hibernate: select count(tag0_.id) as col_0_0_ from tag tag0_
Hibernate: select tag0_.id as id1_6_, tag0_.description as descript2_6_, tag0_.name as name3_6_ from tag tag0_ limit ?
// converting data to JSON automatically
Hibernate: select projectinf0_.tags as tags1_6_0_, projectinf0_.project_info as project_2_7_0_, projectinf1_.id as id1_4_1_, projectinf1_.description as descript2_4_1_, projectinf1_.name as name3_4_1_ from tag_project_info projectinf0_ inner join project_info projectinf1_ on projectinf0_.project_info=projectinf1_.id where projectinf0_.tags=?
Hibernate: select projectinf0_.tags as tags1_6_0_, projectinf0_.project_info as project_2_7_0_, projectinf1_.id as id1_4_1_, projectinf1_.description as descript2_4_1_, projectinf1_.name as name3_4_1_ from tag_project_info projectinf0_ inner join project_info projectinf1_ on projectinf0_.project_info=projectinf1_.id where projectinf0_.tags=?
Hibernate: select projectinf0_.tags as tags1_6_0_, projectinf0_.project_info as project_2_7_0_, projectinf1_.id as id1_4_1_, projectinf1_.description as descript2_4_1_, projectinf1_.name as name3_4_1_ from tag_project_info projectinf0_ inner join project_info projectinf1_ on projectinf0_.project_info=projectinf1_.id where projectinf0_.tags=?
Hibernate: select projectinf0_.tags as tags1_6_0_, projectinf0_.project_info as project_2_7_0_, projectinf1_.id as id1_4_1_, projectinf1_.description as descript2_4_1_, projectinf1_.name as name3_4_1_ from tag_project_info projectinf0_ inner join project_info projectinf1_ on projectinf0_.project_info=projectinf1_.id where projectinf0_.tags=?
Hibernate: select projectinf0_.tags as tags1_6_0_, projectinf0_.project_info as project_2_7_0_, projectinf1_.id as id1_4_1_, projectinf1_.description as descript2_4_1_, projectinf1_.name as name3_4_1_ from tag_project_info projectinf0_ inner join project_info projectinf1_ on projectinf0_.project_info=projectinf1_.id where projectinf0_.tags=?
型
我知道只有5个额外的请求,因为我只有5个依赖于 tag**project_info。因此,作为结论,我的transaction级别不管理transaction。.我已经检查了插件和transactionManager注入beans -创建了一个。没有错误,启动时或运行时没有警告.
1条答案
按热度按时间mrfwxfqh1#
由JB Nizet在评论中
这不是一个事务问题。在文档中查找属性spring.jpa.open-in-view,如果不需要,将其设置为false。
如果我在视图中关闭 *jpa open *,交易就像我预期的那样工作。