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Hi,<div><br></div><div>yes there is a DBNull value. Thanks.</div><div><br></div><div><br><br><hr id="stopSpelling">From: dinov@microsoft.com<br>To: users@lists.ironpython.com<br>Date: Thu, 10 Jun 2010 15:56:50 +0000<br>Subject: Re: [IronPython] deepcopy<br><br>
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<p class="ecxMsoNormal"><span style="font-size:11.0pt;font-family:'Calibri','sans-serif';color:#1F497D">Is there a DBNull value somewhere in your object? DBNull is a singleton and I’d guess we’d need to add some custom logic which says the way we deserialize
it is by pulling the singleton from DBNull.Value. You can probably use copy_reg.pickle to register something which will handle objects of type DBNull that just returns DBNull.Value.</span></p>
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<p class="ecxMsoNormal"><b><span style="font-size:10.0pt;font-family:'Tahoma','sans-serif'">From:</span></b><span style="font-size:10.0pt;font-family:'Tahoma','sans-serif'"> users-bounces@lists.ironpython.com [mailto:users-bounces@lists.ironpython.com]
<b>On Behalf Of </b>Pablo Dalmazzo<br>
<b>Sent:</b> Thursday, June 10, 2010 7:57 AM<br>
<b>To:</b> IronPython Mailing list<br>
<b>Subject:</b> [IronPython] deepcopy</span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">Hi there,</span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">Im getting this error in the copy module. I moved the copy module from the IronPython 2.6 installation to work with</span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">IronPython 2.0 for some compatibility problem I had with IronPython 2.6 dll with another dll we use. </span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">The only difference I see between the cases which works and those which doesnt are, in the succesful case it is a custom class object "alone", and in the error case is the
deepcopy of a custom class object which contains a list with other instances of that object.</span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">Could that have anything to do with the problem? Is that a limitation of the copy module in Python or it should work?</span></p>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">error description: </span></p>
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<p class="ecxMsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'">No se puede encontrar el método 'DBNull..ctor'.<br>
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<b>Error de código fuente:</b> </span></p>
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<pre>Línea 322: args = deepcopy(args, memo)</pre>
<pre>Línea 323: </pre>
<pre><span style="color:red">Línea 324: y = callable(*args)</span></pre>
<pre>Línea 325:</pre>
<pre>Línea 326: memo[id(x)] = y</pre>
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<p class="ecxMsoNormal"><span style="font-size:10.0pt;font-family:'Verdana','sans-serif'"><br>
<b>Archivo de origen: </b>/SistemaVentaBaseIP2/App_Script/copy.py<b> </b>
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