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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-1860] Comment on: &quot;manual/reference/operator/exists.txt&quot;</title>
                <link>https://jira.mongodb.org/browse/DOCS-1860</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;In my installation of MongoDB 2.4.3, using $exists as part of an $elemMatch subquery returns elements with fields that exist but are null. This seems contrary to the behavior described in the documentation.&lt;/p&gt;

&lt;p&gt;Here&apos;s the excerpt from my MongoDB session:&lt;/p&gt;

&lt;p&gt;&amp;gt; db.rewards.findOne({ funds: { $elemMatch: { transactionHash: &quot;915711f675abda802886039388f00feacbeaed843555fd173ca411d39bd30fa4&quot;, approved: {$exists: true}, }}})&lt;br/&gt;
{&lt;br/&gt;
	&quot;_availableFundAmounts&quot; : [ ],&lt;br/&gt;
	&quot;_availableFundPayoutAmounts&quot; : [ ],&lt;br/&gt;
	&quot;_expires&quot; : ISODate(&quot;2013-11-26T22:02:12.012Z&quot;),&lt;br/&gt;
	&quot;_id&quot; : &quot;5b76f2c5bbe1cb10ccc5ee4a&quot;,&lt;br/&gt;
	&quot;currency&quot; : &quot;btc&quot;,&lt;br/&gt;
	&quot;funds&quot; : [&lt;/p&gt;
		{
			&quot;_id&quot; : &quot;89d232cef8542043c985d0f5&quot;,
			&quot;address&quot; : &quot;1LYR9bgHjmXWUmPiz31xdMeMJEC9tp6HwZ&quot;,
			&quot;amount&quot; : &quot;0.05&quot;,
			&quot;approved&quot; : null,
			&quot;currency&quot; : &quot;btc&quot;,
			&quot;details&quot; : null,
			&quot;expires&quot; : ISODate(&quot;2013-11-26T22:02:12.012Z&quot;),
			&quot;payoutAmount&quot; : &quot;0.045&quot;,
			&quot;processor&quot; : &quot;blockchain.info&quot;,
			&quot;proxyAddress&quot; : &quot;14CkgPtryYc7bRr8RVA1nKLz91Q5bwErEq&quot;,
			&quot;refunded&quot; : null,
			&quot;transactionHash&quot; : &quot;915711f675abda802886039388f00feacbeaed843555fd173ca411d39bd30fa4&quot;,
			&quot;userId&quot; : &quot;3bSKsLAhh4LyX4utR&quot;
		}
&lt;p&gt;	],&lt;br/&gt;
	&quot;issueUrl&quot; : &quot;https://github.com/codebounty/codebounty/issues/96&quot;,&lt;br/&gt;
	&quot;lastSync&quot; : ISODate(&quot;2013-08-28T23:05:21.420Z&quot;),&lt;br/&gt;
	&quot;log&quot; : [ ],&lt;br/&gt;
	&quot;payout&quot; : null,&lt;br/&gt;
	&quot;receivers&quot; : [ ],&lt;br/&gt;
	&quot;status&quot; : &quot;open&quot;,&lt;br/&gt;
	&quot;userId&quot; : &quot;3bSKsLAhh4LyX4utR&quot;&lt;br/&gt;
}&lt;/p&gt;

</description>
                <environment>Ubuntu 13.04, 64-bit. MongoDB version 2.4.3.&lt;br/&gt;
&lt;br/&gt;
*Location*: &lt;a href=&quot;http://docs.mongodb.org/manual/reference/operator/exists/&quot;&gt;http://docs.mongodb.org/manual/reference/operator/exists/&lt;/a&gt;&lt;br/&gt;
*User-Agent*: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/28.0.1500.71 Chrome/28.0.1500.71 Safari/537.36&lt;br/&gt;
*Referrer*: &lt;a href=&quot;https://www.google.com/&quot;&gt;https://www.google.com/&lt;/a&gt;&lt;br/&gt;
*Screen Resolution*: 1600 x 900&lt;br/&gt;
*repo*: docs&lt;br/&gt;
*source*: reference/operator/exists&lt;br/&gt;
</environment>
        <key id="87819">DOCS-1860</key>
            <summary>Comment on: &quot;manual/reference/operator/exists.txt&quot;</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="auto">auto</reporter>
                        <labels>
                            <label>collector-298ba4e7</label>
                    </labels>
                <created>Wed, 28 Aug 2013 23:20:07 +0000</created>
                <updated>Fri, 3 Nov 2017 11:24:27 +0000</updated>
                            <resolved>Wed, 25 Sep 2013 18:52:13 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="431348" author="auto" created="Wed, 25 Sep 2013 18:59:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-1860&quot; title=&quot;Comment on: &amp;quot;manual/reference/operator/exists.txt&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-1860&quot;&gt;&lt;del&gt;DOCS-1860&lt;/del&gt;&lt;/a&gt; clarifying examples of $exists&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/d8946bb5d96e2d1743765eb0a94f45bc755c9c2e&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/d8946bb5d96e2d1743765eb0a94f45bc755c9c2e&lt;/a&gt;&lt;/p&gt;</comment>
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