使用jpa和hibernate在orm.xml中定义命名查询 [英] define named query in orm.xml with jpa and hibernate

问题描述

我试图将我的命名查询放在我的orm.xml中（把persistence.xml放在META-INF中），但是我的orm.xml似乎被hibernate / jpa忽略了。

当我尝试使用em.createNamedQuery（myQuery）创建我的命名查询时，它返回它无法找到此查询。

我使用注释，我想将orm.xml中的命名查询外部化（仅此）。

这是我的持久性。 xml：
$ b

<？xml version =1.0encoding =UTF-8？ >
< persistence xmlns =http://java.sun.com/xml/ns/persistencexmlns：xsi =http://www.w3.org/2001/XMLSchema-instancexsi：schemaLocation =http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsdversion =1.0>

< persistence-unit name =defaulttransaction-type =RESOURCE_LOCAL>
< mapping-file> META-INF / orm.xml< / mapping-file>

< class> com.mysite.Account< / class>

<属性>
< property name =hibernate.cache.provider_classvalue =net.sf.ehcache.hibernate.EhCacheProvider/>
< property name =hibernate.cache.use_query_cachevalue =true/>
< property name =hibernate.cache.use_second_level_cachevalue =true/>
< property name =hibernate.show_sqlvalue =true/>
< property name =hibernate.format_sqlvalue =true/>
< property name =use_sql_commentsvalue =false/>
< property name =hibernate.dialectvalue =org.hibernate.dialect.MYSQLDialect/>
< property name =hibernate.c3p0.min_sizevalue =5/>
< property name =hibernate.c3p0.max_sizevalue =20/>
< property name =hibernate.c3p0.timeoutvalue =300/>
< property name =hibernate.c3p0.max_statementsvalue =50/>
< property name =hibernate.c3p0.idle_test_periodvalue =3000/>

< property name =hibernate.search.default.directory_providervalue =org.hibernate.search.store.FSDirectoryProvider/>
< / properties>

< / persistence-unit>

< /持久性>


这里是我的orm.xml

 <？xml version =1.0encoding =UTF-8？> 
< entity-mappings xmlns =http://java.sun.com/xml/ns/persistence/ormxmlns：xsi =http://www.w3.org/2001/XMLSchema-instance xsi：schemaLocation =http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsdversion =1.0> 
 
< package> com.mysite< / package> 
 
< entity class =Account> 
< sql-result-set-mapping name =nicknames> 
< column-result name =nickname/> 
< / sql-result-set-mapping> 
< table name =Account/> 
< named-native-query name =myQueryresult-set-mapping =nicknames> 
< query><！[CDATA [从帐户a选择一个.nickname]]> 
< / query> 
< / named-native-query> 
< / entity> 
< / entity-mappings> 
  

我做错了什么？为什么我的orm.xml被忽略？

谢谢 好的我终于明白了！

我正在将META-INF目录中的orm.xml保存起来。当我把这个文件移动到我的包中有我的域对象的时候（比如在我的例子中：com.mysite），orm.xml不会被忽略，并且全部运行。

我还需要更改映射文件（persistence.xml）中的路径：com / mysite / orm.xml

I'm trying to put my named queries in my orm.xml (put in META-INF with persistence.xml) but my orm.xml seems to be ignored by hibernate/jpa.

When I try to create my named query with em.createNamedQuery("myQuery"), it returns that it can't find this query.

I use annotation and I would like to externalize my named queries in orm.xml (only that).

Here is my persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

<persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
    <mapping-file>META-INF/orm.xml</mapping-file>

    <class>com.mysite.Account</class>

    <properties>
        <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.EhCacheProvider" />
        <property name="hibernate.cache.use_query_cache" value="true" />
        <property name="hibernate.cache.use_second_level_cache" value="true" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="use_sql_comments" value="false" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.MYSQLDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="20" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test_period" value="3000" />

        <property name="hibernate.search.default.directory_provider" value="org.hibernate.search.store.FSDirectoryProvider" />
    </properties>

</persistence-unit>

</persistence>

here is my orm.xml

<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" version="1.0">

<package>com.mysite</package>

<entity class="Account">
    <sql-result-set-mapping name="nicknames">
        <column-result name="nickname" />
    </sql-result-set-mapping>
    <table name="Account" />
    <named-native-query name="myQuery" result-set-mapping="nicknames">
        <query><![CDATA[select a.nickname from Account a]]>
    </query>
    </named-native-query>
</entity>
</entity-mappings>

What I'm doing wrong ? Why my orm.xml is ignored ?

thanks

解决方案

Ok I finally got it !

I was saving my orm.xml in META-INF directory. When I move this file to my package where I have my domain object (like in my example: com.mysite), the orm.xml is not ignored and all run.

I also need to change the path in mapping-file (persistence.xml) : com/mysite/orm.xml

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