Java 使用实体管理器时，没有为该名称定义查询
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No Query defined for that name, when using Entity Manager
提问by mangusbrother
I have the following entity:
我有以下实体：
package com.server.models;
@Entity
@Table(name="users")
@NamedQueries({
@NamedQuery(name=User.QUERY_FIND_USER,query="SELECT c FROM user c WHERE c.username = :username")
})
public class User {
public static final String QUERY_FIND_USER = "LoginFindUser";
// ...
}
And then using the Entity Manager (em) i'm doing the following:
然后使用实体管理器（em）我正在执行以下操作：
package com.server.controllers;
@Service
@Transactional
@RestController
@RequestMapping("/user")
public class LoginController {
@PersistenceContext
private EntityManager em;
// my code
TypedQuery<User> queries = em.createNamedQuery(User.QUERY_FIND_USER,User.class).setParameter("username", username);
List<User> users = queries.getResultList();
}
However I am getting the following error:
但是我收到以下错误：
java.lang.IllegalArgumentException: No query defined for that name [LoginFindUser]
Here's my spring-boot Configuration. This should include the scanning of the entity.
这是我的 spring-boot 配置。这应该包括对实体的扫描。
package com.server.boot;
@Configuration
@ComponentScan({"com.server"})
@EnableAutoConfiguration
public class Starter {
public static void main(String[] args){
SpringApplication.run(Starter.class,args);
System.out.println("started application");
}
@Bean
public LoginController loginController(){
return new LoginController();
}
@Bean
public HibernateJpaSessionFactoryBean sessionFactory(EntityManagerFactory emf) {
HibernateJpaSessionFactoryBean factory = new HibernateJpaSessionFactoryBean();
factory.setEntityManagerFactory(emf);
return factory;
}
}
采纳答案by mangusbrother
Found it. Thanks to the guys in the comments
找到了。感谢评论区的小伙伴们
Add
添加
@EntityScan("com.server.models")
to your configuration class
到您的配置类
and I had an error in the query cause userneeded to be User
我在查询原因中有一个错误user需要User
回答by Rasheed
Okay, this might be an issue with you persistence configuration. If your models definitions are all in a separate ejb, make sure to add them in the persistence.xml in the persistence-unit
好的，这可能是您的持久性配置的问题。如果您的模型定义都在单独的 ejb 中，请确保将它们添加到persistence-unit 的persistence.xml 中
回答by Kevin Tomas
You can use this code snippet shown below.
您可以使用下面显示的代码片段。
<property name="packagesToScan" value="com.servers.model" />
回答by Shubhashish Mishra
Add
添加
entitymanager.packagesToScan:com.server.models
entitymanager.packagesToScan:com.server.models
to your application.properties file.
到您的 application.properties 文件。
