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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>
    </build-info>


<item>
            <title>[GODRIVER-1332] primitive.ObjectID json omitempty doesn&apos;t work</title>
                <link>https://jira.mongodb.org/browse/GODRIVER-1332</link>
                <project id="14289" key="GODRIVER">Go Driver</project>
                    <description>
&lt;p/&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;import (&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;	&quot;go.mongodb.org/mongo-driver/bson/primitive&quot;&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;func main() {&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;	td := struct {&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;		EmptyExample primitive.ObjectID `json:&quot;,omitempty&quot;`&lt;/span&gt;&lt;/pre&gt;
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						&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;   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;	out, err := json.Marshal(td)&lt;/span&gt;&lt;/pre&gt;
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					&lt;pre style=&quot;font-size: 1em; margin: 0 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;	if err != nil {&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;

&lt;p&gt;You get the following output `&lt;/p&gt;
{&quot;EmptyExample&quot;:&quot;000000000000000000000000&quot;}
&lt;p&gt;` instead of an omitted field because the `ObjectID` type is an alias for a 12 byte slice and it doesn&apos;t have a custom json marshaler.&lt;/p&gt;</description>
                <environment></environment>
        <key id="959303">GODRIVER-1332</key>
            <summary>primitive.ObjectID json omitempty doesn&apos;t work</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="13202">Works as Designed</resolution>
                                        <assignee username="divjot.arora@mongodb.com">Divjot Arora</assignee>
                                    <reporter username="epelc@greatcloak.com">Ed Pelc</reporter>
                        <labels>
                    </labels>
                <created>Fri, 4 Oct 2019 14:47:11 +0000</created>
                <updated>Fri, 27 Oct 2023 13:16:31 +0000</updated>
                            <resolved>Mon, 7 Oct 2019 21:43:08 +0000</resolved>
                                                                    <component>BSON</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="2470075" author="divjot.arora" created="Mon, 7 Oct 2019 21:43:16 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=epelc%40greatcloak.com&quot; class=&quot;user-hover&quot; rel=&quot;epelc@greatcloak.com&quot;&gt;epelc@greatcloak.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;Thank you for your bug report and investigation. In addition to the issue you linked, I also found&#160;&lt;a href=&quot;https://github.com/golang/go/issues/29310&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/golang/go/issues/29310&lt;/a&gt;. The underlying issue is that &lt;tt&gt;omitempty&lt;/tt&gt;&#160;only considers an array to be empty if it is of length 0, which is never true for the &lt;tt&gt;ObjectID&lt;/tt&gt; type. By the time &lt;tt&gt;ObjectID.MarshalJSON&lt;/tt&gt; is called, the &lt;tt&gt;encoding/json&lt;/tt&gt; library has already determined that the value is not zero and therefore will not be omitted. Furthermore, there is nothing that our &lt;tt&gt;MarhsalJSON&lt;/tt&gt; function can return to indicate that the value is zero and should not be marshalled (returning an empty &lt;tt&gt;[]byte&lt;/tt&gt; causes a panic in the json code). As a result, I&apos;m going to close this ticket. If you find anything helpful or if the &lt;tt&gt;encoding/json&lt;/tt&gt; library changes to allow this behavior, feel free to re-open.&lt;/p&gt;

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

&lt;p&gt;&amp;#8211; Divjot&lt;/p&gt;</comment>
                            <comment id="2466487" author="epelc@greatcloak.com" created="Fri, 4 Oct 2019 15:09:00 +0000"  >&lt;p&gt;Upon further inspection you can not fix this by modifying `func (id ObjectID) MarshalJSON()` since the go json lib doesn&apos;t support it.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://github.com/golang/go/issues/11939&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/golang/go/issues/11939&lt;/a&gt;&lt;/p&gt;</comment>
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