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<channel>
    <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>
    </build-info>


<item>
            <title>[DOCS-15453] Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages</title>
                <link>https://jira.mongodb.org/browse/DOCS-15453</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>    &lt;div class=&quot;panel&quot; style=&quot;background-color: #c2d2c2;border-width: 1px;&quot;&gt;&lt;div class=&quot;panelHeader&quot; style=&quot;border-bottom-width: 1px;background-color: #239eb0;&quot;&gt;&lt;b&gt;Original Downstream Change Summary&lt;/b&gt;&lt;/div&gt;&lt;/div&gt;
&lt;p&gt;    $addFields and $set will no longer throw an error if you want to set a path to an empty object.&lt;br/&gt;
For example the stage {$set: {a: {}}} would take an incoming document and set the &apos;a&apos; field to an empty object.&lt;br/&gt;
The behavior of $project behavior has not been changed and in order to get the same behavior a user would still have to wrap the object with $literal like this: {$project: {a: {$literal: {}}}}&lt;/p&gt;
&lt;h2&gt;&lt;a name=&quot;DescriptionofLinkedTicket&quot;&gt;&lt;/a&gt;Description of Linked Ticket&lt;/h2&gt;
&lt;p&gt;    Permit empty objects as expressions in &lt;a href=&quot;https://docs.mongodb.com/manual/reference/operator/aggregation/set/#pipe._S_set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;$set&lt;/a&gt;&#160; and $addFields aggregation stages. For example, an aggregation stage definition&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; {$set: {a: {}}} &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;should be accepted and should add field &quot;a: {}&quot; to the resulting object (this looks like an intuitively expected system behavior). Nesting of objects should be supported, like in a following example:&#160;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$set: {a: {b: {}}}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;&#160;Currently, to achieve this behavior a wrapper expression $literal has to be used like this:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$set: {a: {$literal: {}}}}&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;But an aggregation stage definition&#160;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;{$set: {a: []}} &lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;is accepted and results in field &quot;a: []&quot;, which is somewhat inconsistent with handling of empty objects.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://docs.mongodb.com/manual/reference/operator/update/set/#up._S_set&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;$set&lt;/a&gt; update operator expression with a field with an empty object&#160;&#160;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.foo.updateOne({}, {$set: { a: {} }})&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;is accepted.&lt;/p&gt;

&lt;p&gt;Furthermore, we have recently relaxed restrictions for update modifiers (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38909&quot; title=&quot;Permit empty update modifiers, treating as a no-op rather than an error&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38909&quot;&gt;&lt;del&gt;SERVER-38909&lt;/del&gt;&lt;/a&gt;) and $addFields (&lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-48890&quot; title=&quot;allow $addFields with empty document and have it be a no-op&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-48890&quot;&gt;&lt;del&gt;SERVER-48890&lt;/del&gt;&lt;/a&gt;)(permits {$set: {}}) to permit empty documents, thus this improvement would increase consistency.&lt;/p&gt;

&lt;p&gt;Currently, execution of a $set aggregation stage with an empty object as an expression, like&#160;&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
		&lt;tbody &gt;
				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;db.foo.updateOne({}, [{$set: { a: {} }}])&lt;/span&gt;&lt;/pre&gt;
			&lt;/td&gt;
		&lt;/tr&gt;
			&lt;/tbody&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;p/&gt;
&lt;p&gt;fails with the following error message: &quot;Invalid $set :: caused by :: an empty object is not a valid value. Found empty object at path a&quot;.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="2078719">DOCS-15453</key>
            <summary>Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="jocelyn.mendez@mongodb.com">Jocelyn Mendez</assignee>
                                    <reporter username="backlog-server-pm">Backlog - Core Eng Program Management Team</reporter>
                        <labels>
                    </labels>
                <created>Tue, 28 Jun 2022 16:14:46 +0000</created>
                <updated>Mon, 13 Nov 2023 17:39:55 +0000</updated>
                            <resolved>Fri, 30 Sep 2022 11:37:01 +0000</resolved>
                                    <version>6.1.0</version>
                                    <fixVersion>6.1.0-rc0</fixVersion>
                    <fixVersion>Server_Docs_20231030</fixVersion>
                    <fixVersion>Server_Docs_20231106</fixVersion>
                    <fixVersion>Server_Docs_20231105</fixVersion>
                    <fixVersion>Server_Docs_20231113</fixVersion>
                                    <component>manual</component>
                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5049494" author="xgen-internal-githook" created="Mon, 12 Dec 2022 23:00:48 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jocelyn-mendez1&apos;, &apos;email&apos;: &apos;91144778+jocelyn-mendez1@users.noreply.github.com&apos;, &apos;username&apos;: &apos;jocelyn-mendez1&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; $addFields and $set accept paths to empty object (#1889)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; combined two bullets&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; combined two bullets&lt;br/&gt;
Branch: indexes-refactor&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/23698d08029d6cbb5cb659f69825fd5481f9878a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/23698d08029d6cbb5cb659f69825fd5481f9878a&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="4866753" author="xgen-internal-githook" created="Thu, 29 Sep 2022 20:18:21 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;jocelyn-mendez1&apos;, &apos;email&apos;: &apos;91144778+jocelyn-mendez1@users.noreply.github.com&apos;, &apos;username&apos;: &apos;jocelyn-mendez1&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; $addFields and $set accept paths to empty object (#1889)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt;  and  accept empty objects&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; added behavioral bullet&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; combined two bullets&lt;/li&gt;
&lt;/ul&gt;


&lt;ul&gt;
	&lt;li&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-15453&quot; title=&quot;Investigate changes in SERVER-54046: Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-15453&quot;&gt;&lt;del&gt;DOCS-15453&lt;/del&gt;&lt;/a&gt; combined two bullets&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/10gen/docs-mongodb-internal/commit/23698d08029d6cbb5cb659f69825fd5481f9878a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/10gen/docs-mongodb-internal/commit/23698d08029d6cbb5cb659f69825fd5481f9878a&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="4645269" author="edu.bot" created="Tue, 28 Jun 2022 16:14:59 +0000"  >&lt;p&gt;&lt;em&gt;Fix Version updated for upstream &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-54046&quot; title=&quot;Permit empty objects as expressions in $set and $addFields aggregation stages&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-54046&quot;&gt;&lt;del&gt;SERVER-54046&lt;/del&gt;&lt;/a&gt;:&lt;/em&gt; &lt;br/&gt;
6.1.0-rc0&lt;/p&gt;</comment>
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                            <customfieldvalue>$addFields and $set will no longer throw an error if you want to set a path to an empty object.&lt;br/&gt;
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