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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>[SERVER-3046] $bit update modifier doesn&apos;t work when field does not exist</title>
                <link>https://jira.mongodb.org/browse/SERVER-3046</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The $bit update modifier doesn&apos;t work when field does not exist. In this case it also causes other update modifiers to be ignored. To be consistent with other modifieds (like $inc) it should probably treat a nonexistent field as an implied zero.&lt;/p&gt;

&lt;p&gt;To reproduce:&lt;/p&gt;

&lt;p&gt;&amp;gt; // $bit or should work if field doesn&apos;t exist:&lt;br/&gt;
&amp;gt; db.test.insert(&lt;/p&gt;
{x:1}
&lt;p&gt;)&lt;br/&gt;
&amp;gt; db.test.find()&lt;/p&gt;
{ &quot;_id&quot; : ObjectId(&quot;4dc29da73691b2a95024293b&quot;), &quot;x&quot; : 1 }
&lt;p&gt;&amp;gt; db.test.update({}, { $bit : { or : &lt;/p&gt;
{ y : 2 }
&lt;p&gt;}}) // y does not exist&lt;br/&gt;
&amp;gt; db.test.find()&lt;/p&gt;
{ &quot;_id&quot; : ObjectId(&quot;4dc29da73691b2a95024293b&quot;), &quot;x&quot; : 1 }
&lt;p&gt;&amp;gt;&lt;br/&gt;
&amp;gt; // $bit with field that doesn&apos;t exist causes other modifiers to be ignored&lt;br/&gt;
&amp;gt; db.test.update({}, { $set : &lt;/p&gt;
{ x : 2 }
&lt;p&gt;, $bit : { or : &lt;/p&gt;
{ y : 2 }
&lt;p&gt;}}) // y does not exist&lt;br/&gt;
&amp;gt; db.test.find()&lt;/p&gt;
{ &quot;_id&quot; : ObjectId(&quot;4dc29da73691b2a95024293b&quot;), &quot;x&quot; : 1 }
&lt;p&gt;&amp;gt;&lt;br/&gt;
&amp;gt; // $bit with field that doesn&apos;t exist causes other modifiers to be ignored&lt;br/&gt;
&amp;gt; db.test.update({}, { $set : &lt;/p&gt;
{ x : 2 }
&lt;p&gt;, $bit : { and : &lt;/p&gt;
{ y : 2 }
&lt;p&gt;}}) // y does not exist, $set of x is ignored&lt;br/&gt;
&amp;gt; db.test.find()&lt;/p&gt;
{ &quot;_id&quot; : ObjectId(&quot;4dc29da73691b2a95024293b&quot;), &quot;x&quot; : 1 }
&lt;p&gt;&amp;gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="16660">SERVER-3046</key>
            <summary>$bit update modifier doesn&apos;t work when field does not exist</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="david.storch@mongodb.com">David Storch</assignee>
                                    <reporter username="robert@mongodb.com">Robert Stam</reporter>
                        <labels>
                    </labels>
                <created>Thu, 5 May 2011 13:00:05 +0000</created>
                <updated>Tue, 12 Jul 2016 00:19:22 +0000</updated>
                            <resolved>Wed, 20 Nov 2013 20:39:35 +0000</resolved>
                                    <version>1.8.1</version>
                                    <fixVersion>2.5.3</fixVersion>
                                    <component>Write Ops</component>
                                        <votes>4</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="515904" author="fastest963" created="Fri, 14 Mar 2014 03:57:35 +0000"  >&lt;p&gt;Any chance of backporting this to 2.4 or 2.2? There isn&apos;t really a workaround for this without doing a lookup first.&lt;/p&gt;</comment>
                            <comment id="459339" author="scotthernandez" created="Wed, 20 Nov 2013 20:39:35 +0000"  >&lt;p&gt;Looks like there is already a test here &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/jstests/verify_update_mods.js#L55&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/blob/master/jstests/verify_update_mods.js#L55&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="459317" author="david.storch" created="Wed, 20 Nov 2013 20:23:17 +0000"  >&lt;p&gt;This is fixed in 2.5.3. I will add a js test before resolving.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="18041">SERVER-3223</issuekey>
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