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PORails keep if false, render if true
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  1. PORails keep if false, render if true
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    copied!<p>I have a div tag that I want to change only if a function returns true, otherwise I want it to keep the same content. I used <code>render: nothing =&gt; true</code> but that removes everything.</p> <pre><code>&lt;%= javascript_include_tag :defaults %&gt; &lt;div id="x"&gt;Hi&lt;/div&gt; &lt;% form_remote_tag :url =&gt; {:action =&gt; 'get'}, :update =&gt; 'x' do %&gt; &lt;%= text_field_tag 'url' %&gt; &lt;%= submit_tag "Submit" %&gt; &lt;% end %&gt; def getImage @img = params[:url] if !verify @img render :nothing =&gt; true end end private def verify url return true if url =~ /https?:\/\/.*\.(jpg|png|gif|bmp)$/ return false end </code></pre> <p>I want to make my rails code do this</p> <pre><code>var lastrequest = ""; function ajaxObj() { //Returns the ajax object based on browser if ( window.XMLHttpRequest ) { return new XMLHttpRequest(); //Firefox } else if ( window.ActiveXObject ) { return new ActiveXObject("Microsoft.XMLHTTP"); //IE } } window.onload = function() { document.getElementById("Submit").onclick = function() { var request = ajaxObj(); request.onreadystatechange = function() { if ( request.readyState == 4 ) { document.getElementById("imgdisplay").innerHTML = request.responseText; document.getElementById("imgurl").value = ""; } } if ( lastrequest != document.getElementById("imgurl").value ) { // Makes sure it doesn't request the same image twice var parameters = "url=" + document.getElementById("imgurl").value; request.open("POST", "imageget.php", true); // Sends the ajax request request.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); request.setRequestHeader("Content-length", parameters.length); request.setRequestHeader("Connection", "close"); request.send(parameters); lastrequest = document.getElementById("imgurl").value; } } } </code></pre>
 

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