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PORails + ajaxForm: Use the 'error' callback when error uploading file
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  1. PORails + ajaxForm: Use the 'error' callback when error uploading file
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    copied!<h2>Background</h2> <p>I first wanted to upload a file via json and get a response in that way as well.</p> <p>I'm using:</p> <ul> <li>Rails 3</li> <li><a href="http://jquery.malsup.com/form" rel="nofollow noreferrer">ajaxForm</a></li> </ul> <p>I soon found out that <a href="https://stackoverflow.com/questions/2755802/jquery-ajaxform-returning-json-file/2756314#2756314">you can't get a reponse in json</a>. So, I follow that advice and returned as text.</p> <p>I'm able to get things working after removing the pre tags. Ugly solution, but it's an ugly problem.</p> <h1>Problem</h1> <p>Now, my problem is <strong>handling errors</strong>.</p> <h2>Here's the JS:</h2> <pre><code>$('form#new_image').submit(function() { $(this).ajaxSubmit({ dataType: 'text', beforeSubmit: showLoading, success: imageUploadSuccess, error: imageUploadError }); return false; }); function imageUploadSuccess(data) { var jsonObject = $.parseJSON((/&lt;pre&gt;(.+)&lt;\/pre&gt;/.exec(data))[1]); //Do something } function imageUploadError(data) { alert("FAIL!"); } </code></pre> <p>Even if I respond with an error, the success callback (imageUploadSuccess) is always executed.</p> <h2>Here's my controller:</h2> <pre><code>def create @image = Image.new params[:file] @image.imageable_type = params[:imageable_type] @image.imageable_id = params[:imageable_id] respond_to do |f| if @image.save logger.debug "PASSED" f.text {render :text =&gt; @image.to_json} else logger.debug "FAIL" f.text { render :text =&gt; "Fail!", :status =&gt; 500 } end end end </code></pre> <p>Now, while I could return a json object with <code>success: false</code> in it when it fails, it just feels dirty that the success callback is always executed.</p> <p><strong>How do I make use of the error callback?</strong></p>
 

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