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    <p>Well I tried for what you said and got the image preview in my application doing so:</p> <p><strong>My view</strong>:</p> <pre><code>&lt;% if current_user %&gt; &lt;p&gt;Welcome &lt;%= current_user.email %&gt;&lt;/p&gt; &lt;tr&gt;&lt;input type="file" id="files" name="files[]" multiple /&gt; &lt;img id="list" src="#" alt="Image" width="100" height="100"&gt;&lt;/img&gt;&lt;/tr&gt; &lt;% end %&gt; &lt;style&gt; .thumb { height: 75px; border: 1px solid #000; margin: 10px 5px 0 0; } &lt;/style&gt; &lt;script type="text/javascript"&gt; function handleFileSelect(evt) { var files = evt.target.files; // FileList object // Loop through the FileList and render image files as thumbnails. for (var i = 0, f; f = files[i]; i++) { // Only process image files. if (!f.type.match('image.*')) { continue; } var reader = new FileReader(); // Closure to capture the file information. reader.onload = (function(theFile) { return function(e) { // Render thumbnail. var span = document.createElement('span'); span.innerHTML = ['&lt;img class="thumb" src="', e.target.result, '" title="', escape(theFile.name), '"/&gt;'].join(''); document.getElementById('list').insertBefore(span, null); }; })(f); // Read in the image file as a data URL. reader.readAsDataURL(f); } } document.getElementById('files').addEventListener('change', handleFileSelect, false); &lt;/script&gt; </code></pre> <p>As you see above code is done by me taking into account a single user image preview before upload. But the same you can do for multiple users by changing the query and a little code for multiple users.</p> <p>Cheers!</p>
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    1. POShow image preview after image upload
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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