在Grails中重用JPA注释类 [英] Reusing JPA annotated class in Grails

问题描述

我遵循了文档，并将我的JPA批注类放在 src / main / java 下。 b
$ b

我在 conf / hibernate 下面放置了一个 hibernate.cfg.xml ，如下所示：

 <？xml version ='1.0'encoding ='utf-8'？> 
<！DOCTYPE hibernate-configuration PUBLIC 
 -  // Hibernate / Hibernate Configuration DTD // EN
http://www.hibernate.org/dtd/hibernate-configuration- 3.0.dtd> 
< hibernate-configuration> 
< session-factory> 
< mapping package =com.damluar/> 
< mapping class =com.damluar.CustomerPropertyEntity/> 
 ... 
< / session-factory> 
< / hibernate-configuration> 
  

我还发现提及我需要添加

  configClass = org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsAnnotationConfiguration 
  

到我的 DataSource.groovy 。

然后我使用脚手架生成控制器和视图。当我启动应用程序或使用控制台时，Grails会抛出异常：

  URI 
 / dataTypeEntity / index 
类
 groovy.lang.MissingMethodException 
消息
无方法签名：static com.damluar.DataTypeEntity.count（）适用参数类型：（）values：[]可能的解决方案：print（java.lang.Object），print（java.io.PrintWriter），wait（），dump（），collect（），find（）
  

看起来Grails不会将持久性方法添加到域类中。

当我启动应用程序时，Grails列出了现有的工件：
Artefacts

 控制器：3 
域名：0 
  

解决方案

Grails 3.0.1，解决方案是在 grails-app / conf 中放入 hibernate.cfg.xml 在hibernate子目录内），如 mapping-with-hibernate-annotations-in-grails-3-0-1 。

I followed the documentation and put my JPA annotated classes under src/main/java.

In addition I put a hibernate.cfg.xml under conf/hibernate which looks like this:

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <mapping package="com.damluar" />
        <mapping class="com.damluar.CustomerPropertyEntity"/>
        ...
    </session-factory>
</hibernate-configuration>

I also found mentions that I need to add

configClass = org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsAnnotationConfiguration

to my DataSource.groovy.

Then I generated controllers and views using scaffolding. When I start the app or use a console, Grails throws exception:

URI
    /dataTypeEntity/index
Class
    groovy.lang.MissingMethodException
Message
    No signature of method: static com.damluar.DataTypeEntity.count() is applicable for argument types: () values: [] Possible solutions: print(java.lang.Object), print(java.io.PrintWriter), wait(), dump(), collect(), find()

It looks like Grails doesn't add persistence methods to the domain classes.

Also when I start the application Grails lists existing artefacts: Artefacts

Controllers: 3
Domains: 0

解决方案

I had a similar issue with Grails 3.0.1, and the solution was to put hibernate.cfg.xml in grails-app/conf (not inside a hibernate subdirectory) as described in mapping-with-hibernate-annotations-in-grails-3-0-1.

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