Ruby On Rails 3, form_tag remote on responding to Ajax request
thanks for reading this post. I\'ve been stuck on an issue with RoR for the past few days. I have a form under index.html.erb as:
A
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<span>(楼主)</span>
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<span>2021-02-02 02:16</span>
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<p>I posted this answer on Hacker News, but figured the Stack Overflow community might benefit as well :-)</p>
<p>In Rails 3, the javascript drivers are very hands-off (i.e. unobtrusive). The problem you're having is that your app is returning to the browser a string of javascript, but there is nothing in the page that is then executing that javascript in the context of the page.</p>
<p>The rails.js ujs driver binds to forms and links with <code>data-remote=true</code>, which is what the <code>:remote => true</code> is doing, to make them submit their requests remotely, but that is where the Rails magic stops. </p>
<p>The good news is that the remote requests fires off some events you can bind to, which give you access to the data returned by the server (which fire off in the following order):</p>
<pre><code> ajax:before
ajax:loading
ajax:success
ajax:complete
ajax:failure
ajax:after
</code></pre>
<p>You need to bind an event to the <code>ajax:success</code> event of your form. So, if your form had the id "myform", you'd want something like this on your page:</p>
<pre><code> $('#myform').bind('ajax:success', function(evt, data, status, xhr){
eval(xhr.responseText);
});
</code></pre>
<p><code>xhr.responseText</code> is what your server returns, so this simply executes it as javascript.</p>
<p>Of course, it's proper to also bind to the failure event with some error handling as well.</p>
<p>I usually don't even use the action.js.erb method of returning javascript, I just have my controller render the HTML partial, and then I have a binding like this in the page:</p>
<pre><code> $('#myform').bind('ajax:success', function(evt, data, status, xhr){
$('#target-div').html(xhr.responseText);
});
</code></pre>
<p>I'm actually in the middle of writing a full article on this, but hopefully this is enough to get you going.</p>
<p>EDIT: I finished that article, fully explaining remote links and forms in Rails 3. Maybe it will help: </p>
<p>Rails 3 Remote Links and Forms:
A Definitive Guide</p>
</p>
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