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POLift - Autocomplete with Ajax Submission
 

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  1. POLift - Autocomplete with Ajax Submission
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    <p>I would like to use an autocomplete with ajax. So my goal is to have: </p> <ul> <li><p>When the user types something in the text field, some suggestions provided by the server appear (I have to find suggestions in a database)</p></li> <li><p>When the user presses "enter", clicks somewhere else than in the autocomplete box, or when he/she selects a suggestion, the string in the textfield is sent to the server. </p></li> </ul> <p>I first tried to use the autocomplete widget provided by lift but I faced three problems: </p> <ul> <li>it is meant to be an extended select, that is to say you can originally only submit suggested values. </li> <li>it is not meant to be used with ajax. </li> <li>it gets buggy when combined with <code>WiringUI</code>. </li> </ul> <p>So, my question is: How can I combine <a href="http://docs.jquery.com/Plugins/Autocomplete" rel="noreferrer">jquery autocomplete</a> and interact with the server in lift. I think I should use some callbacks but I don't master them. </p> <p>Thanks in advance. </p> <p><strong>UPDATE</strong> Here is a first implementation I tried but the callback doesn't work: </p> <pre><code>private def update_source(current: String, limit: Int) = { val results = if (current.length == 0) Nil else /* generate list of results */ new JsCmd{def toJsCmd = if(results.nonEmpty) results.mkString("[\"", "\", \"", "\"]") else "[]" } } def render = { val id = "my-autocomplete" val cb = SHtml.ajaxCall(JsRaw("request"), update_source(_, 4)) val script = Script(new JsCmd{ def toJsCmd = "$(function() {"+ "$(\"#"+id+"\").autocomplete({ "+ "autocomplete: on, "+ "source: function(request, response) {"+ "response("+cb._2.toJsCmd + ");" + "}"+ "})});" }) &lt;head&gt;&lt;script charset="utf-8"&gt; {script} &lt;/script&gt;&lt;/head&gt; ++ &lt;span id={id}&gt; {SHtml.ajaxText(init, s=&gt;{ /*set cell to value s*/; Noop}) } &lt;/span&gt; } </code></pre> <p>So my idea was: </p> <ul> <li>to get the selected result via an <code>SHtml.ajaxText</code> field which would be wraped into an autocomplete field</li> <li>to update the autocomplete suggestions using a javascript function</li> </ul>
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