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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>[GODRIVER-1816] recommend against the use of maps?</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-1816</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>&lt;p&gt;What originally drove me to this issue is related to&#160;&lt;a href=&quot;https://jira.mongodb.org/browse/GODRIVER-877&quot; title=&quot;FindOne() nondeterministically returns empty singleResult&quot; class=&quot;issue-link&quot; data-issue-key=&quot;GODRIVER-877&quot;&gt;&lt;del&gt;GODRIVER-877&lt;/del&gt;&lt;/a&gt;. However, rather than Go&apos;s non-deterministic maps being used in a filter expression, the use of maps in my actual data that I was inserting (and querying) was an issue.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Currently, you can create data that takes advantage of a map, for example:&lt;br/&gt;
&#160;&lt;/p&gt;
&lt;p/&gt;
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&lt;p/&gt;
&lt;p&gt;&#160;&lt;br/&gt;
&#160;&lt;br/&gt;
With the above example, when the data is inserted by mongodb-go-driver, it looks like it may take the same unordered/non-deterministic methods that Go itself does.&lt;br/&gt;
&#160;&lt;br/&gt;
The problem with this is let&apos;s say you want to compare the entire &lt;b&gt;provider_arguments&lt;/b&gt; field, by passing in your own map field... this isn&apos;t possible as that non-deterministic logic will intermittently fail.&lt;br/&gt;
&#160;&lt;br/&gt;
With BSON, and order on insert mattering, but the comparison and insert essentially being random, I believe the &lt;b&gt;use of maps&lt;/b&gt;&#160;should be discouraged, and noted that this will not work as intended (and how Go&apos;s behavior will make querying difficult).&lt;br/&gt;
&#160;&lt;br/&gt;
It&apos;s possible to use something like &lt;b&gt;provider_arguments.&amp;lt;field&amp;gt;&lt;/b&gt;&#160;in a bson.M/bson.D, but this is very hacky when the the keys aren&apos;t hardcoded, and may lead to potential security concerns without proper validation of input keys (e.g, my &lt;b&gt;provider_arguments&lt;/b&gt;&#160;are coming from parsed data from HTTP GET parameters, and you have to join them together).&lt;br/&gt;
&#160;&lt;br/&gt;
Thoughts?&lt;br/&gt;
&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="1579435">GODRIVER-1816</key>
            <summary>recommend against the use of maps?</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="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="me@liamstanley.io">Liam Stanley</reporter>
                        <labels>
                    </labels>
                <created>Sat, 2 Jan 2021 06:32:29 +0000</created>
                <updated>Wed, 30 Mar 2022 23:46:02 +0000</updated>
                                                                            <component>Documentation</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3547961" author="isabella.siu" created="Mon, 4 Jan 2021 22:17:10 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=me%40liamstanley.io&quot; class=&quot;user-hover&quot; rel=&quot;me@liamstanley.io&quot;&gt;me@liamstanley.io&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thanks for filing this ticket! We&apos;ll add notes to the documentation to advise against using bson.Ms for nested fields.&lt;/p&gt;</comment>
                    </comments>
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