hibernate/jpa元模型类不包含所有字段 [英] hibernate/jpa metamodel classes do not include all fields

问题描述

我正在使用maven开发并在eclipse中进行编辑的hibernate/jpa应用程序遇到此超级烦人的问题.

I am having this super irritating issue with my hibernate/jpa app I'm developing using maven and editing in eclipse.

我在属性">编译器">注释处理"中设置了目标/元模型位置，并且一切正常，除了一个类，其中元模型类仅包含id.

I have my target/metamodel location set up in Properties > compiler > annotation processing, and it's all working fine, except for one class, where the metamodel class only contains the id.

这是实体:

@Entity
public class User {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;

private String username;
private String password;

@Transient
private Authorization authorization;
// getters/setters omitted, but I do have them in the entity class
}

这是元模型类

@Generated(value="Dali", date="2019-06-22T11:49:45.797-0400")
@StaticMetamodel(User.class)
public class User_ {
     public static volatile SingularAttribute<User, Integer> id;
}

此问题仅发生在User类中，所有其他类都可以.我在DAO中遇到编译错误，试图在该DAO中尝试使用用户名/pw获得用户，并且这些字段在metamodel类中不存在.

This issue only occurs in the User class, all other classes are fine. I am getting compile errors in my DAO where I try to get a user with username/pw, and those fields do not exist in the metamodel class.

有什么想法会导致这种情况吗? 在linux上工作，编译器设置为1.8. 谢谢

Any ideas what would cause this? Working on linux, compiler set to 1.8. thanks

最后我通过在persistence.xml中为实体添加条目来解决它

I ended up solving it by adding an entry for the entity in persistence.xml

<class>com.mypack.model.User</class>

我经历了创建实体以及执行id保存，更新，删除和获取id函数的过程，而没有persistence.xml条目.我想我从一些开始，发现我不需要它们，并注释掉了它们.

I had gone thru the process of creating the entity and doing crud save, update, delete, and get by id functions, without the persistence.xml entries. I think I started with a few, found I didn't need them and commented them out.

现在看到，当我尝试创建criteriabuilder/root/query等时，遇到了这个问题.将实体添加到persistence.xml似乎已经解决了它.

Seeing now that when I try to create a criteriabuilder/root/query, etc, I run into that issue. Adding the entity to persistence.xml seems to have resolved it.

推荐答案

我认为这可能是Dali Generator的错.我通过常规的Maven插件尝试了hibernate-jpamodelgen，它工作正常.

I think it may be Dali generator's fault. I tried with hibernate-jpamodelgen through regular maven plugin and it works fine.

我建议您做同样的事情:它可以工作，项目中的每个人都会从中受益，您不必提交生成的源代码，也不必告诉每个人以相同的方式配置Eclipse.

I suggest you do the same: it works, and everyone working on the project will benefit from it, you won't have to commit generated sources or tell everyone to configure Eclipse in the same way.

<build>
  <plugins>
    <plugin>
      <artifactId>maven-compiler-plugin</artifactId>
      <configuration>
        <source>1.8</source>
        <target>1.8</target>
        <compilerArguments>
          <processor>org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor</processor>
        </compilerArguments>
      </configuration>
    </plugin>
  </plugins>
</build>

<dependencies>
  <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-jpamodelgen</artifactId>
    <version>5.4.3.Final</version>
  </dependency>
</dependencies>

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