Question

我是MyBatis的新手，所以如果有人可以帮我解决我的问题，那就太想了。问题围绕着电视节目。

物件

程序
产品

映射

一个程序显示多个产品
程序将来可以重复多次，或者已经过去

选择查询

<select id="findsProgramGuideDetails" resultMap="programGuideDetails" parameterType="map">
        select 
             sourceCode, showCode, productNumber, programTitle, OTHER_FIELDS 
             from MY_TABLE where SOME_CONDITIONS
</select>

结果地图

<resultMap id="programGuideDetails" type="com.qvc.integration.batch.programguide.vo.UdbProgramGuideDataloadDetailsVo">
    <id property="sourceCode" column="sourceCode"
typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />

  <result property="showCode" column="showCode"
  typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />

  <result property="programTitle" column="programTitle"
                typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
... Other Result tags

在Resultmap中收集

<collection property="plannedShows" ofType="com.test.programguide.dataload.model.vo.PlannedShow" column="programTitle">
    <id property="showTitle" column="programTitle"
                typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="id" column="sourceCode"
                typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="channelCode" column="channel"
                typeHandler="com.test.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="startDate" column="startDate"
                typeHandler="com.test.integration.batch.programguide.typehandler.DateFormatTypeHandler" />
    <result property="endDate" column="endDate"
                typeHandler="com.test.integration.batch.programguide.typehandler.DateFormatTypeHandler" />
</collection>

<collection property="productDetails" ofType="com.qvc.programguide.dataload.model.vo.ProductDetail" column="sourceCode">
    <id property="productId" column="productNumber"
                typeHandler="com.qvc.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="productName" column="productName"
                typeHandler="com.qvc.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="brandId" column="brandId"
                typeHandler="com.qvc.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="brandName" column="brandName"
                typeHandler="com.qvc.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
    <result property="priceCode" column="priceCode"
                typeHandler="com.qvc.integration.batch.programguide.typehandler.StringTrimmingTypeHandler" />
</collection>

问题

每个唱片都会正常播放多个产品，但计划中的电视节目，即之前和即将播放的重复电视广播仅仅是为了获取。

任何帮助将不胜感激。

Answer 1

关系一对多很简单，使用集合标记并定义参数以加入密钥，在这种情况下，我还使用请求参数作为子选择列。

<resultMap  type="package.pojo.Recipient" id="receiversResultMap">
    <result column="EMAIL_ADDRESS" property="emailAddress" />
    <result column="END_TS" property="endTs" />
    <result column="NAME" property="name" />        
    <result column="RECIPIENT_ID" property="recipientId" />         
    <result column="START_TS" property="startTs" />         
    <result column="TYPE" property="type" />        
    <result column="UPDATE_TS" property="updateTs" />       
    <result column="USER_ID" property="userId" />       
    <collection property="messages" column="{param1=RECIPIENT_ID, param2=LOCKID}"  javaType="ArrayList" ofType="java.util.List" select="findMessages" />            
</resultMap>

<select id="findReceivers" resultMap="receiversResultMap">

        SELECT 
               EMAIL_ADDRESS,
               END_TS,
               NAME,
               RECIPIENT_ID,
               START_TS,
               TYPE,
               UPDATE_TS,
               USER_ID,
               #{lockId} AS LOCKID

                 FROM T_DOPA0_RECIPIENT     
</select>   


<resultMap  type="package.pojo.Message" id="messageResultMap">
    <result column="EMAIL_USED" property="emailUsed" />
    <result column="LOCK_ID" property="lockId" />
    <result column="MESSAGE_ID" property="messageId" />
    <result column="RECEIPT_TS" property="receiptTs" />         
    <result column="RECIPIENT_ID" property="recipientId" />         
    <result column="SELECTED" property="selected" />        
    <result column="SEND_TS" property="sendTs" />               
    <result column="TYPE" property="type" />        
    <result column="DESCRIPTION" property="description" />
</resultMap>    

<select id="findMessages"   resultMap="messageResultMap">
            SELECT
                   EMAIL_USED,
                   LOCK_ID,
                   MESSAGE_ID,
                   RECEIPT_TS,
                   RECIPIENT_ID,
                   SELECTED,
                   SEND_TS,
                   TYPE,
                   DECODE.DESCRIPTION

                    FROM T_MESSAGE MESSAGE
                    LEFT OUTER JOIN D_MESSAGE_TYPE DECODE ON DECODE.LOCK_MESSAGE_TYPE = MESSAGE.TYPE

                    WHERE   RECIPIENT_ID = '${param1}'

                            AND LOCK_ID = '${param2}'

</select>

MyBatis - 获取多个集合

1 个答案: