在liferay中生成one to many 关系说明
在liferay中生成one to many 关系说明
1：在service.xml中配置
For example：
<column< p="">
?????? name="shoppingItemPrices"
?????? type="Collection"
?????? entity="ShoppingItemPrice"
?????? mapping-key="itemId"
/>
说明： entity和mapping-key属性被指定将建立一个一对多的关系。
2：运行ant build
?????? 生成相关文件
3：在生成的实体实现类中，如ShoppingItemImp.java，新增getShoppingItemPrice()方法
?????? For example：
?????? public List getItemPrices()
?????? throws PortalException, SystemException {
/*此处return有2种写法
第一种是要求在关系实体中定义根据关联实体id进行查询的方法，如：
*/
return ShoppingItemPriceLocalServiceUtil.getItemPrices(getItemId());
/*
第二种是通过业务层代理类获的实体的持久类实例进行操作
*/
return ActiveEntryLocalServiceUtil.getActiveEntryPersistence().getCheckItemEntries(this.getActiveId());
??? }
4：再次运行 ant build
如此便可在使用实体的时候直接获取关联对象实体
如：
List list = ActiveEntry.getCheckItemEntries ();
如果要在hbm配置文件中生成一对多关系描述，则需修改freemarker模板文件
文件路径：com/liferay/portal/tool/servicebuilder/dependencies/hbm_xml.flt
（如果对其他生成文件内容做调整，也可修改其他对应的模板文件）
修改为如下内容（也可直接copy）
<#list entities as entity>
??? <#if entity.hasColumns()>
?????? <class name="${packagePath}.model.impl.${entity.name}Impl" table="${entity.table}">
?????????? <cache usage="read-write">
?????????? <#if entity.hasCompoundPK()>
????????????? <composite-id name="primaryKey" class="${packagePath}.service.persistence.${entity.name}PK">
????????????????? <#assign pkList = entity.getPKList()>
????????????????? <#list pkList as column>
???????????????????? <key-property name="${column.name}" <="" span="">
???????????????????? <#if column.name != column.DBName>
???????????????????????? column="${column.DBName}"
???????????????????? <!---->
???????????????????? />
????????????????? <!---->
????????????? </composite-id>
?????????? <#else>
????????????? <#assign column = entity.getPKList()?first>
????????????? <id name="${column.name}" <="" span="">
????????????? ??? <#if column.name != column.DBName>
???????????????????? column="${column.DBName}"
????????????????? <!---->
????????????????? type="<#if !entity.hasPrimitivePK()>java.lang.<!---->${column.type}">
????????????????? <#if column.idType??>
???????????????????? <#assign class = serviceBuilder.getGeneratorClass("${column.idType}")>
???????????????????? <#if class == "class">
???????????????????????? <#assign class = column.IdParam>
???????????????????? <!---->
????????????????? <#else>
???????????????????? <#assign class = "assigned">
????????????????? <!---->
????????????????? <generator class="${class}" <="" span="">
????????????????? <#if class == "sequence">
???????????????????????? ${column.IdParam}
???????????????????? </generator>
????????????????? <#else>
???????????????????? />
????????????????? <!---->
????????????? </id>
?????????? <!---->
?????????? <#list entity.columnList as column>
????????????? <#if column.EJBName??>
????????????????? <#assign ejbName = true>
????????????? <#else>
????????????????? <#assign ejbName = false>
????????????? <!---->
????????????? <#if !column.isPrimary() && !column.isCollection() && !ejbName>
????????????????? <property name="${column.name}" <="" span="">
????????????????? <#if column.name != column.DBName>
???????????????????? column="${column.DBName}"
????????????????? <!---->
????????????????? <#if column.isPrimitiveType() || column.type == "String">
????????????????? ??? type="com.liferay.util.dao.hibernate.${serviceBuilder.getPrimitiveObj("${column.type}")}Type"
????????????????? <!---->
????????????????? />
????????????? <!---->
????????????? <#if !column.isPrimary() && column.isCollection()>
????????????????? ????
????????????????? <#if column.isMappingOneToMany()>
???????????????? ????????
???????????????????????? <key column="${column.getMappingKey()}">
???????????????????????? <one-to-many class="${packagePath}.service.persistence.${column.EJBName}">
????????????????????????
?????? ?????????????<!---->
???????????????????
????????????? <!---->
?????????? <!---->
?????? </class>
??? <!---->
<!---->
