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Date: Wed, 25 Jul 2007 09:05:03 -0500
From: "Bob Hanson" <mnbob70@gmail.com>
To: user-cs@ibatis.apache.org
Subject: Re: Constuctor with GroupBy Problem
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Group by result maps do not currently support the use of a constructor
element.

On 7/25/07, Samnang Chhun <samnang.chhun@gmail.com> wrote:
>
>  Hi,
>
>
>
> I'm just getting to work with iBatis.Net in my C# project. I found a
> problem when I call constructor with groupBy in my ResultMap. What have I
> done something wrong?
>
>
>
> <resultMap id="personResult" class="Person" groupBy="_id">
>
>       <constructor>
>
>           <argument argumentName="id" column="id"/>
>
>       </constructor>
>
>       <result property="_name" column="name" />
>
>       <result property="_address" resultMapping="Person.addressResult"/>
>
> </resultMap>
>
>
>
> <resultMap id="addressResult" class="Address">
>
>       <result property="_type" column="type" />
>
>       <result property="_value" column="value" />
>
> </resultMap>
>
>
>
> My error is : System.NullReferenceException: Object reference not set to
> an instance of an object.
>
>
>
>
>
> Cheers,
>
> Samnang
>

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Group by result maps do not currently support the use of a constructor element.<br><br><div><span class="gmail_quote">On 7/25/07, <b class="gmail_sendername">Samnang Chhun</b> &lt;<a href="mailto:samnang.chhun@gmail.com">samnang.chhun@gmail.com
</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">








<div link="blue" vlink="purple" lang="EN-US">

<div>

<p>Hi,</p>

<p>&nbsp;</p>

<p>I'm just getting to work with iBatis.Net in my C#
project. I found a problem when I call constructor with groupBy in my ResultMap.
What have I done something wrong?</p>

<p>&nbsp;</p>

<p style=""><span style="font-size: 10pt; color: blue;">&lt;</span><span style="font-size: 10pt; color: maroon;">resultMap</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
id</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">personResult</span>&quot;<span style="color: blue;"> </span><span style="color: red;">class</span>
<span style="color: blue;">=</span>&quot;<span style="color: blue;">Person</span>&quot;<span style="color: blue;"> </span><span style="color: red;">groupBy</span><span style="color: blue;">=</span>&quot;<span style="color: blue;">
_id</span>&quot;<span style="color: blue;">&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;</span><span style="font-size: 10pt; color: maroon;">constructor</span><span style="font-size: 10pt; color: blue;">&gt;</span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;
&nbsp;&lt;</span><span style="font-size: 10pt; color: maroon;">argument</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">argumentName</span><span style="font-size: 10pt; color: blue;">
=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">id</span>&quot;<span style="color: blue;"> </span><span style="color: red;">column</span><span style="color: blue;">=</span>&quot;<span style="color: blue;">
id</span>&quot;<span style="color: blue;">/&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;/</span><span style="font-size: 10pt; color: maroon;">constructor</span><span style="font-size: 10pt; color: blue;">&gt;</span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;</span><span style="font-size: 10pt; color: maroon;">result</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
property</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">_name</span>&quot;<span style="color: blue;"> </span><span style="color: red;">column</span>
<span style="color: blue;">=</span>&quot;<span style="color: blue;">name</span>&quot;<span style="color: blue;"> /&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;</span><span style="font-size: 10pt; color: maroon;">result</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
property</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">_address</span>&quot;<span style="color: blue;"> </span><span style="color: red;">resultMapping
</span><span style="color: blue;">=</span>&quot;<span style="color: blue;">Person.addressResult</span>&quot;<span style="color: blue;">/&gt;</span></span></p>

<p><span style="font-size: 10pt; color: blue;">&lt;/</span><span style="font-size: 10pt; color: maroon;">resultMap</span><span style="font-size: 10pt; color: blue;">&gt;</span></p>

<p><span style="font-size: 10pt; color: blue;">&nbsp;</span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&lt;</span><span style="font-size: 10pt; color: maroon;">resultMap</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
id</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">addressResult</span>&quot;<span style="color: blue;"> </span><span style="color: red;">class</span>
<span style="color: blue;">=</span>&quot;<span style="color: blue;">Address</span>&quot;<span style="color: blue;">&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;</span><span style="font-size: 10pt; color: maroon;">result</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
property</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">_type</span>&quot;<span style="color: blue;"> </span><span style="color: red;">column</span>
<span style="color: blue;">=</span>&quot;<span style="color: blue;">type</span>&quot;<span style="color: blue;"> /&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;</span><span style="font-size: 10pt; color: maroon;">result</span><span style="font-size: 10pt; color: blue;"> </span><span style="font-size: 10pt; color: red;">
property</span><span style="font-size: 10pt; color: blue;">=</span><span style="font-size: 10pt;">&quot;<span style="color: blue;">_value</span>&quot;<span style="color: blue;"> </span><span style="color: red;">column</span>
<span style="color: blue;">=</span>&quot;<span style="color: blue;">value</span>&quot;<span style="color: blue;"> /&gt;</span></span></p>

<p style=""><span style="font-size: 10pt; color: blue;">&lt;/</span><span style="font-size: 10pt; color: maroon;">resultMap</span><span style="font-size: 10pt; color: blue;">&gt;</span></p>

<p>&nbsp;</p>

<p>My error is : <span style="font-size: 8pt; font-family: Courier; color: darkred;">System.NullReferenceException: Object reference not set to an
instance of an object.</span></p>

<p><span style="font-size: 8pt; font-family: Courier; color: darkred;">&nbsp;</span></p>

<p>&nbsp;</p>

<p>Cheers,</p>

<p>Samnang</p>

</div>

</div>


</blockquote></div><br>

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