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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Method of Queryable take expression trees. Ruby lambdas are not
convertible to expression trees.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You need to build the expression tree yourself.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Tomas<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><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"'>
ironruby-core-bounces@rubyforge.org
[mailto:ironruby-core-bounces@rubyforge.org] <b>On Behalf Of </b>Ivan Porto
Carrero<br>
<b>Sent:</b> Tuesday, April 07, 2009 11:06 AM<br>
<b>To:</b> ironruby-core<br>
<b>Subject:</b> [Ironruby-core] Linq syntax?<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>What would be the syntax to call Linq methods?<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>for example: <o:p></o:p></p>
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<p class=MsoNormal>I have an IQueryable<Users> and I want to get the
equivalent out of<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>from user in MyRepository.Users<o:p></o:p></p>
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<p class=MsoNormal>where <a href="http://user.name">user.name</a> ==
"somename"<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>That of course is only one example, I want to do a lot more
:)<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>My best guess is that I would have to do something like this
only it doesn't work<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>System::Linq::Queryable.where(MyRepository.Users, lambda {
|user| <a href="http://user.name">user.name</a> == "somename" })<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>yields wrong number of arguments (2 for 2147483647)<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>So what is the correct way?<o:p></o:p></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'>---<br>
Met vriendelijke groeten - Best regards - Salutations<br>
Ivan Porto Carrero<br>
Blog: <a href="http://flanders.co.nz">http://flanders.co.nz</a><br>
Twitter: <a href="http://twitter.com/casualjim">http://twitter.com/casualjim</a><br>
Author of IronRuby in Action (<a href="http://manning.com/carrero">http://manning.com/carrero</a>)<o:p></o:p></p>
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