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    <title>MongoDB Jira</title>
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    <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-743] $append modifier</title>
                <link>https://jira.mongodb.org/browse/SERVER-743</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Appends a string to a string field.&lt;br/&gt;
If the string field does not exist in the document, it just sets it.&lt;/p&gt;

&lt;p&gt;db.collection.insert({_id: &quot;test&quot;, message: &quot;Mongo&quot;}); //message is now &quot;Mongo&quot;&lt;/p&gt;

&lt;p&gt;db.colection.update({_id: &quot;test&quot;}, {$append: &lt;/p&gt;
{message: &quot;DB&quot;}
&lt;p&gt;, false, false}; //message is now &quot;MongoDB&quot;&lt;/p&gt;

&lt;p&gt;db.colection.update({_id: &quot;test&quot;}, {$append: &lt;/p&gt;
{anotherMessage: &quot;NoSQL&quot;}
&lt;p&gt;, false, false}; //anotherMessage is now &quot;NoSQL&quot;&lt;/p&gt;</description>
                <environment></environment>
        <key id="11500">SERVER-743</key>
            <summary>$append modifier</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="dabreaka">Slavi Pantaleev</reporter>
                        <labels>
                    </labels>
                <created>Sat, 13 Mar 2010 14:44:09 +0000</created>
                <updated>Tue, 6 Dec 2022 05:50:21 +0000</updated>
                            <resolved>Sat, 29 Jun 2019 07:13:36 +0000</resolved>
                                    <version>1.3.3</version>
                                                    <component>Write Ops</component>
                                        <votes>1</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="2305617" author="asya" created="Sat, 29 Jun 2019 07:13:36 +0000"  >&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-40381&quot; title=&quot;Add the ability to specify a pipeline to an update command&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-40381&quot;&gt;&lt;del&gt;SERVER-40381&lt;/del&gt;&lt;/a&gt; implemented support for aggregation expressions to specify update for 4.2.&#160;&lt;/p&gt;

&lt;p&gt;You can see some examples &lt;a href=&quot;https://docs.mongodb.com/master/reference/command/update/index.html#update-command-example-agg&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;here.&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="290396" author="justanyone" created="Fri, 15 Mar 2013 19:06:02 +0000"  >&lt;p&gt;See also:&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/CS-6195&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/CS-6195&lt;/a&gt;  Ability to append binary data to a binary object.&lt;/p&gt;</comment>
                            <comment id="21138" author="remonvv" created="Tue, 7 Dec 2010 14:41:55 +0000"  >&lt;p&gt;I think having a ton of modifiers with very specific use cases should be avoided. I don&apos;t think this is something that is really lacking, and it can be done with findAndModify()&lt;/p&gt;</comment>
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            <issuekey id="11617">SERVER-829</issuekey>
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