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Arthur van Hoff wrote:
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<p class="MsoNormal">I am trying to write a query to find the
broadcaster for a podcast
without inverting the query. I am guess that I can use “any_reverse”,
but the query below is not working for me and I can’t find a good
explanation of how it is supposed to work. Any suggestions on what I
might be doing
wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">“query”: [{<o:p></o:p></p>
<p class="MsoNormal"> "name": "ABC News",<o:p></o:p></p>
<p class="MsoNormal"> "type":
"/user/cotton/default_domain/podcast",<o:p></o:p></p>
<p class="MsoNormal">
"/type/reflect/any_reverse": [{<o:p></o:p></p>
<p class="MsoNormal">
"optional":true,<o:p></o:p></p>
<p class="MsoNormal"> "name":
null,<o:p></o:p></p>
<p class="MsoNormal"> "link":
{<o:p></o:p></p>
<p class="MsoNormal">
"master_property":
"/user/cotton/default_domain/broadcaster/broadcasts"<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> }]<o:p></o:p></p>
<p class="MsoNormal">}]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PS: I know there is a back pointer
"/user/cotton/default_domain/broadcast/broadcaster”
which makes this easy, but I am trying to understand how to do it the
hard way.</p>
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Heh, yeah sometimes the hard way is the only way to go.. sometimes
programatically the only good way to phrase queries is with
any_master/any_reverse. You'll see that we do this when viewing the
properties of a particular topic in the filter view.. here's bill
clinton's education - Use firebug to find the the any_master phrase in
the MQL query:<br>
<br>
<a class="moz-txt-link-rfc2396E" href="http://www.freebase.com/view/filter/education/education?propertyId=%2Fpeople%2Fperson%2Feducation&topicId=%2Ftopic%2Fen%2Fbill_clinton"><http://www.freebase.com/view/filter/education/education?propertyId=%2Fpeople%2Fperson%2Feducation&topicId=%2Ftopic%2Fen%2Fbill_clinton></a><br>
<br>
You've got the right general idea though, and I think you've got
any_reverse mixed up with the wrong master_property... so you can
either use any_master and
/user/cotton/default_domain/broadcaster/broadcasts, or you can use
any_reverse with /user/cotton/default_domain/broadcast/broadcaster.<br>
<br>
A third option is to phrase your master_property clause as such:<br>
<br>
"link": {<br>
"master_property": {"reverse_property":
"/user/cotton/default_domain/broadcaster/broadcasts" }}<br>
}<br>
<br>
this is saying "give me the reverse property, where the reverse of the
link is ...broadcaster/broadcasts...<br>
<br>
I suspect that any_master is really what you want though..<br>
<br>
Alec<br>
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<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 8pt; color: rgb(166, 166, 166);">___________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 8pt; color: rgb(166, 166, 166);">Arthur van Hoff,
CTO Software and Services, Dell-ZING<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 8pt; color: rgb(166, 166, 166);">W: 650-267-2413,
F: 650-267-2498, M: 650-283-0842<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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