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From Clinton Begin <clinton.be...@gmail.com>
Subject Re: Bidirectional association in iBATIS 3?
Date Fri, 04 Sep 2009 20:06:09 GMT
PS:  Please include the exception as well.

Clinton

On Fri, Sep 4, 2009 at 2:05 PM, Clinton Begin <clinton.begin@gmail.com>wrote:

> A stack overflow is most likely a bug in iBATIS.  Can you create a simple
> unit test (HSQLDB or Derby/JavaDB) and create a Jira ticket for it?
>
> I believe we have unit tests to cover this case, but your code must test
> the framework in a new way.
>
> Thanks much.
>
> Clinton
>
>
> On Fri, Sep 4, 2009 at 12:43 PM, rtrip <rtrip@mailinator.com> wrote:
>
>>
>> This may have been asked a couple of times, but I haven't seen a useful
>> answer yet. My domain model has a parent-child relationship, but the child
>> also needs to have a reference to the parent object. Something like
>>
>> Group {
>>     int groupId;
>>     String groupName;
>>     List<Item> items;
>>     .....
>>     .....
>> }
>>
>> Item {
>>    int itemId;
>>    String itemName;
>>    Group parentGroup;
>>    ....;
>> }
>>
>>
>> How do I express this relationship in a resultMap? I tried the following,
>> but it gives me a StackOverflowError when I try to run a <select> query
>> with
>> a join between the Group and Item tables:
>>
>>    <resultMap id="groupMap" type="GroupDTO">
>>        <id property="groupId" column="groupId"/>
>>        <collection property="items" resultMap="itemMap"/>
>>    </resultMap>
>>
>>    <resultMap id="itemMap" type="ItemDTO">
>>            <id property="itemId" column="itemId"/>
>>            <result property="objectId" column="objectId"/>
>>            <result property="objectType" column="objectType"/>
>>            <association property="parentGroup" column="groupId"
>> resultMap="groupMap"/>
>>    </resultMap>
>>
>> I'm sure I'm doing something wrong here with the circular reference, but I
>> don't know what's the right way to do this. I have seen statements on this
>> list referring to this issue being solved by the iBATIS cache, but I'm not
>> sure how. Can anyone help, or point me to the solution? (Hibernate does
>> this
>> kind of stuff easily, but sucks for many other reasons)
>>
>> Thanks
>>
>> - rtrip
>> --
>> View this message in context:
>> http://www.nabble.com/Bidirectional-association-in-iBATIS-3--tp25299690p25299690.html
>> Sent from the iBATIS - User - Java mailing list archive at Nabble.com.
>>
>>
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>>
>

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