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            <title>[SERVER-1298] ON DELETE, ON CASCADE for DBRef</title>
                <link>https://jira.mongodb.org/browse/SERVER-1298</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;I love the way MongoDB handles data.&lt;/p&gt;

&lt;p&gt;But there is no mechanism for &apos;foreign keys&apos; in the way like sql, what is a must have.&lt;/p&gt;

&lt;p&gt;I mean, there should be a mechanism we can delete items automatically if a DBRef becomes null&lt;br/&gt;
(the item wehere the reference points to is removed). In SQL you have foreign keys with ON DELETE CASCADE  or ON UPDATE CASCADE, etc.&lt;/p&gt;

&lt;p&gt;Is it possible to do this (easily) ?&lt;/p&gt;</description>
                <environment></environment>
        <key id="12249">SERVER-1298</key>
            <summary>ON DELETE, ON CASCADE for DBRef</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="vdvleon">Leon van der Veen</reporter>
                        <labels>
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                <created>Fri, 25 Jun 2010 08:03:45 +0000</created>
                <updated>Fri, 2 Jun 2023 11:46:31 +0000</updated>
                            <resolved>Tue, 23 Jun 2015 17:10:26 +0000</resolved>
                                                                    <component>Usability</component>
                    <component>Write Ops</component>
                                        <votes>5</votes>
                                    <watches>9</watches>
                                                                                                                <comments>
                            <comment id="5470106" author="JIRAUSER1273994" created="Fri, 2 Jun 2023 11:46:31 +0000"  >&lt;p&gt;I created a new ticket for this, since transactions on sharded clusters work nowadays &lt;a href=&quot;https://feedback.mongodb.com/forums/924280-database/suggestions/46728697-cascading-delete-for-dbrefs&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://feedback.mongodb.com/forums/924280-database/suggestions/46728697-cascading-delete-for-dbrefs&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="948334" author="ian@10gen.com" created="Tue, 23 Jun 2015 17:10:26 +0000"  >&lt;p&gt;Hi Leon, thanks a lot for filing this feature request and apologies for the time since it was last updated.&lt;/p&gt;

&lt;p&gt;We&apos;re going to close this ticket as &quot;Won&apos;t Fix&quot; given the constraints around making this work seamlessly in a sharded cluster.&lt;/p&gt;</comment>
                            <comment id="15066" author="eliot" created="Fri, 25 Jun 2010 09:34:40 +0000"  >&lt;p&gt;The big problem is how this interacts with sharding, since a ref may point to something on a different server.&lt;/p&gt;</comment>
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