[ http://issues.apache.org/jira/browse/IBATIS-136?page=all ]
Clinton Begin closed IBATIS-136:
--------------------------------
Fix Version: 2.1.5
Resolution: Fixed
Assign To: Clinton Begin
Fixed. Extended result maps now carry forward the groupBy attribute, and also
allow it to be overridden.
> Unexpected interaction between "groupBy" and "extends" resultmap attributes
> ---------------------------------------------------------------------------
>
> Key: IBATIS-136
> URL: http://issues.apache.org/jira/browse/IBATIS-136
> Project: iBatis for Java
> Type: Bug
> Components: SQL Maps
> Versions: 2.1.0
> Environment: MS Windows XP Professional, JDK 1.3
> Reporter: Geoff Chiang
> Assignee: Clinton Begin
> Priority: Minor
> Fix For: 2.1.5
>
> If a resultmap extends another by means of the "extends" attribute, any
> grouping information in the "base" resultmap is not correctly reflected in
> any created objects when using the extended resultmap.
> Consider the following resultmaps:
> <resultMap id="communicationSearchResult" class="communication"
> groupBy="communicationID">
> <result property="communicationID" column="communication_id"/>
> <result property="communicationDate" column="communication_date"/>
> <result property="communicationType" column="communication_type_id"
> typeHandler="communicationTypeTHC"/>
> <result property="title" column="subject_1"/>
> <result property="subject" column="subject_2"/>
> <result property="customers" resultMap="Customer.customerResult"/>
> </resultMap>
> <resultMap id="communicationResult" class="communication"
> extends="Communication.communicationSearchResult">
> <result property="details" column="contact_detail" jdbcType="CLOB"/>
> </resultMap>
> Note the grouping on the "customers" attribute in the base resultmap.
> Execution of a query which uses the "communicationResult" result map will
> result in the "customers" attribute having a null value, despite the fact
> that the query clearly returns the correct data.
> A workaround for this is to repeat the grouping information in the extended
> resultmap, for example:
> <resultMap id="communicationResult" class="communication"
> extends="Communication.communicationSearchResult" groupBy="communicationID">
> <result property="details" column="contact_detail" jdbcType="CLOB"/>
> <result property="customers" resultMap="Customer.customerResult"/>
> </resultMap>
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