title: Update single field in CouchDB
body: <p>I want update one field in a document. I created a new document:</p>
  
  <p><a href="https://i.stack.imgur.com/5XgSU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5XgSU.png" alt="My new document"></a></p>
  
  <p>And I would like to change the value of field <code>name</code> from <code>aaa</code> to <code>test</code>. I copied a script from: <code>wiki.apache.org/couchdb/Document_Update_Handlers</code>, and I created a new design document:</p>
  
  <p><a href="https://i.stack.imgur.com/52rLO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/52rLO.png" alt="New design document"></a></p>
  
  <p>Next I created a URL:</p>
  
  <pre><code>localhost:5984/asd/_design/temp/_update/in-place-query/8d6257096bbb199a3757954c00000d0c?name=title&amp;value=test
  </code></pre>
  
  <p>That should update my field. I instead saw the error:</p>
  
  <pre><code>"{"error":"TypeError","reason":"{[{&lt;&lt;\"message\"&gt;&gt;,&lt;&lt;\"point is undefined\"&gt;&gt;},\n  {&lt;&lt;\"fileName\"&gt;&gt;,&lt;&lt;\"../share/couchdb/server/main.js\"&gt;&gt;},\n  {&lt;&lt;\"lineNumber\"&gt;&gt;,1500},\n  {&lt;&lt;\"stack\"&gt;&gt;,\n   &lt;&lt;\"(\\\"_design/temp\\\",[object Array],[object Array])@../share/couchdb/server/main.js:1500\\n()@../share/couchdb/server/main.js:1562\\n@../share/couchdb/server/main.js:1573\\n\"&gt;&gt;}]}"}"
  </code></pre>
  
  <p>Have you got any idea to repair it?</p>