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<p style="margin: 10px 0 0 0">I think the cause of the problem is the method </p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">MongoDBDialect#doAggregate</pre>
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<p style="margin: 10px 0 0 0">.<br /> It needs to unwind (<a href="http://docs.mongodb.org/manual/reference/operator/aggregation/unwind/" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">http://docs.mongodb.org/manual/reference/operator/aggregation/unwind/</a>) the result of a query when an embedded collection appears in the projection list.</p>
<p style="margin: 10px 0 0 0">I don't think it's something we can solve. Maybe we can try sending a test to the FongoDB project.<br /> Excluding the test for FongoDB and add note in the doucumentation seems a viable option to me.</p>
<p style="margin: 10px 0 0 0">Also, keep in mind this note from <a href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=emmanuel" class="user-hover" rel="emmanuel" style="color: #3b73af; text-decoration: none">Emmanuel Bernard</a> (on IRC the link is attached to the JIRA):</p>
<blockquote style="margin: 10px 0 0 0; border-left: 1px solid #ccc; color: #707070; margin-left: 19px; padding: 10px 20px">
<p style="margin: 10px 0 0 0">about fongo, it's likely that the MongoDB 3 driver migration will break it<br /> probably enough that we will ahve to remove the support</p>
</blockquote>
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