Collections MyBatis,集合的嵌套结果为空
我按照MyBatis网站中的示例创建了一个具有嵌套集合的映射器,当我执行选择操作时,我的对象提供程序返回,但其中的集合ProviderParameter为空,当我转到数据库工具并应用相同的查询时,我得到了预期的结果,集合也返回 这是我的地图:Collections MyBatis,集合的嵌套结果为空,collections,mybatis,Collections,Mybatis,我按照MyBatis网站中的示例创建了一个具有嵌套集合的映射器,当我执行选择操作时,我的对象提供程序返回,但其中的集合ProviderParameter为空,当我转到数据库工具并应用相同的查询时,我得到了预期的结果,集合也返回 这是我的地图: <resultMap id="Provider" type="xxx.Provider"> <result column="idProvider" property="idProvider"/>
<resultMap id="Provider" type="xxx.Provider">
<result column="idProvider" property="idProvider"/>
<result column="providerType" property="providerType"/>
<result column="username" property="username"/>
<result column="password" property="password"/>
<result column="licenceInformation" property="licenseInformation"/>
<collection property="parameters" ofType="xxx.ProviderParameter">
<result column="idProviderParameter" property="idProviderParameter"/>
<result column="name" property="name"/>
<result column="value" property="value"/>
</collection>
</resultMap>
然后选择:
<select id="getProviderById" resultType="xxx.Provider">
select P.idProvider as idProvider
,P.providerType as providerType
,P.username as username
,P.password as password
,P.licenceInformation as licenceInformation
,PP.idProviderParameter as idProviderParameter
,PP.name as name
,PP.value as value
from [dbo].[msg_Provider] AS P
left outer join [dbo].[msg_ProviderParameter] AS PP on P.idProvider = PP.idProvider
where P.idProvider = #{idProvider}
</select>
我的问题是,在选择中,我将resultType而不是resultMap 因此,select应该如下所示:
<select id="getProviderById" resultMap="Provider">
select P.idProvider as idProvider
,P.providerType as providerType
,P.username as username
,P.password as password
,P.licenceInformation as licenceInformation
,PP.idProviderParameter as idProviderParameter
,PP.name as name
,PP.value as value
from [dbo].[msg_Provider] AS P
left outer join [dbo].[msg_ProviderParameter] AS PP on P.idProvider = PP.idProvider
where P.idProvider = #{idProvider}
</select>