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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>[SERVER-637] Scoped variables in MongoCode do not work in map reduce operations (ReferenceError)</title>
                <link>https://jira.mongodb.org/browse/SERVER-637</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The following code should not give an error.&lt;/p&gt;

&lt;p&gt;&amp;lt;?php &lt;br/&gt;
$m = new Mongo(); &lt;br/&gt;
$db = $m-&amp;gt;selectDB(&apos;example&apos;); &lt;br/&gt;
$c = $db-&amp;gt;selectCollection(&apos;example&apos;); &lt;br/&gt;
$c-&amp;gt;save(array(&apos;test&apos;=&amp;gt;&apos;foo&apos;)); &lt;br/&gt;
$ordered_options&lt;span class=&quot;error&quot;&gt;&amp;#91;&amp;#39;mapreduce&amp;#39;&amp;#93;&lt;/span&gt; = &apos;example&apos;; &lt;br/&gt;
$map_str = &apos;function(){for (var i=0;i&amp;lt;testvar.length;i++){emit(i, &lt;br/&gt;
testvar&lt;span class=&quot;error&quot;&gt;&amp;#91;i&amp;#93;&lt;/span&gt;);}}&apos;; &lt;br/&gt;
$map_code = new MongoCode($map_str, array(&apos;testvar&apos; =&amp;gt; array(&apos;a&apos;, &apos;b&apos;, &lt;br/&gt;
&apos;c&apos;))); &lt;br/&gt;
$reduce_code = new MongoCode(&apos;function(key, values)&lt;/p&gt;
{return 1;}
&lt;p&gt;&apos;); &lt;br/&gt;
$options = array( &lt;br/&gt;
    &apos;mapreduce&apos; =&amp;gt; &apos;example&apos;, &lt;br/&gt;
    &apos;map&apos; =&amp;gt; $map_code, &lt;br/&gt;
    &apos;reduce&apos; =&amp;gt; $reduce_code &lt;br/&gt;
); &lt;br/&gt;
$mr_res = $db-&amp;gt;command($options); &lt;br/&gt;
print_r($map_code); &lt;br/&gt;
print_r($mr_res); &lt;br/&gt;
?&amp;gt; &lt;br/&gt;
OUTPUT &lt;br/&gt;
MongoCode Object &lt;br/&gt;
( &lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;code&amp;#93;&lt;/span&gt; =&amp;gt; function(){for (var i=0;i&amp;lt;testvar.length;i++){emit(i, &lt;br/&gt;
testvar&lt;span class=&quot;error&quot;&gt;&amp;#91;i&amp;#93;&lt;/span&gt;);}} &lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;scope&amp;#93;&lt;/span&gt; =&amp;gt; Array &lt;br/&gt;
        ( &lt;br/&gt;
            &lt;span class=&quot;error&quot;&gt;&amp;#91;testvar&amp;#93;&lt;/span&gt; =&amp;gt; Array &lt;br/&gt;
                ( &lt;br/&gt;
                    &lt;span class=&quot;error&quot;&gt;&amp;#91;0&amp;#93;&lt;/span&gt; =&amp;gt; a &lt;br/&gt;
                    &lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt; =&amp;gt; b &lt;br/&gt;
                    &lt;span class=&quot;error&quot;&gt;&amp;#91;2&amp;#93;&lt;/span&gt; =&amp;gt; c &lt;br/&gt;
                ) &lt;br/&gt;
        ) &lt;br/&gt;
) &lt;br/&gt;
Array &lt;br/&gt;
( &lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;errmsg&amp;#93;&lt;/span&gt; =&amp;gt; assertion: map invoke failed: JS Error: &lt;br/&gt;
ReferenceError: testvar is not defined nofile_b:0 &lt;br/&gt;
    &lt;span class=&quot;error&quot;&gt;&amp;#91;ok&amp;#93;&lt;/span&gt; =&amp;gt; 0 &lt;br/&gt;
) &lt;/p&gt;</description>
                <environment></environment>
        <key id="11308">SERVER-637</key>
            <summary>Scoped variables in MongoCode do not work in map reduce operations (ReferenceError)</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="3">Duplicate</resolution>
                                        <assignee username="eliot">Eliot Horowitz</assignee>
                                    <reporter username="mikedransfield">Mike Dransfield</reporter>
                        <labels>
                    </labels>
                <created>Mon, 15 Feb 2010 14:11:41 +0000</created>
                <updated>Mon, 15 Feb 2010 15:42:12 +0000</updated>
                            <resolved>Mon, 15 Feb 2010 15:42:12 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="12319" author="eliot" created="Mon, 15 Feb 2010 15:42:12 +0000"  >&lt;p&gt;See &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-520&quot; title=&quot;CodeWScope not working in reduce function for M/R&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-520&quot;&gt;&lt;del&gt;SERVER-520&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Though i&apos;m not sure this really makes sense.&lt;br/&gt;
See: &quot;scope&quot; on &lt;a href=&quot;http://www.mongodb.org/display/DOCS/MapReduce&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/MapReduce&lt;/a&gt; for a better more general method.&lt;/p&gt;</comment>
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