Update: Sergio, , the author of the livevalidation rails plugin updated the plugin so you can disregard the finale of the article (validatesconfirmationof is working, , as well as the newest version of livevalidation, , 1.3 is used in the plugin - so no additional tweaking is needed, , install and validate away ;-))
Surely I am not the only one who was a ‘bit nervous’ (that was a mild euphemism) when his carefully entered data disappeared after submitting a form to the server. , Nowadays web applications are doing better than that - valid data is saved and only the problematic fields are pointed out.
Of course even that feels so 1990’s now. , A contemporary (ehm… , web 2.0?) web application is expected to validate the form on the client side already (WARNING! That doesn’t mean at all you shouldn’t validate on the server side though - client side validation is for the good guys but you should still look out for the script kiddies et al), , pointing out the errors on the fly so there is no need to come back and change/edit those fields after submitting a form.
My library of choice is livevalidation, , which has a Rails companion too - if you are using Rails form helpers and standard validation on your models, , you don’t have to touch anything just install livevalidation (=drop it to your javascripts folder, , it’s a single .js file). , w00t!
The only major shortcoming (from my POV) of the Rails plugin is that validatesconfirmationof is not implemented. , However, , it’s easy to add it via standard javascript:
<input id="user_password" name="user[password]" size="30" type="password" />
<input id="user_password_confirmation" name="user[password_confirmation]" size="30">
<script type="text/javascript">
var validate = new LiveValidation('user_password_confirmation');
validate.add( Validate.Confirmation, , { match: 'user_password' } );
</script>
That’s it!
One more note: the Rails plugin contains version 1.2 but there is a newer version, , 1.3 so be sure to replace it.
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April 16th, 2008 at 5:42 am
, [...] Live Validation for Rails — Live validation plugin for rails makes validating forms client-side a no-brainer. [...]
April 16th, 2008 at 6:37 am
, [...] Ruby, , Rails, , Web2.0 » Blog Archive » Live Validation - Easy Client-side Javascript Validation My library of choice is livevalidation, , which has a Rails companion too - if you are using Rails form helpers and standard validation on your models, , you don’t have to touch anything just install livevalidation (=drop it to your javascripts folder, , it’s a single .js file). w00t! [...]
April 17th, 2008 at 2:02 am
, Hello, , and thanks a lot for reviewing my plugin, , I hope you find it useful.
, BTW, , validatesconfirmationof is supposed to work, , so if it doesn’t for you please send me your code and I’ll try to fix it.
, I’ll update the JS library to version 1.3 soon (as soon as I check it works OK with the plugin), , I didn’t even know it was released! (I don’t follow its development very much; actually I wrote this plugin mainly because I don’t like JS =;-) )
, Thank you!
April 18th, 2008 at 5:52 am
, Hey Sergio
, Well I guess I was depending too much on the info I got from you
You wrote on the plugin page that it’s not working, , so I considered it true and went with the javascript version. So does it work now? If it does, , and you replaced the 1.2 with 1.3, , drop me a message please and I’ll update the article.
, Thanks for dropping by!
Peter
April 18th, 2008 at 1:07 pm
, I would prefer something Web Forms 2 compatible http://www.whatwg.org/specs/ There are some libraries already, , but probably not ready for production yet.
April 19th, 2008 at 1:12 pm
, Oops! Docs were slightly outdated; they are updated now.
, I have also updated the Javascript library to version 1.3 (remember to rerun the rake task).
, Thank you!
April 20th, 2008 at 2:06 am
, Sergio, ,
, Updated the article, , thanks for your hard work!
April 22nd, 2008 at 9:09 pm
, I love the plugin, , but I can’t get it to work with rails as a plugin. I can add my own javascript in the view for a validation and it works, , but the ‘install and let it work’ isn’t working, , it just doesn’t try to validate anything in my form. Anyone else having this problem or know how to fix it? I didn’t change anything form the install, , just followed the directions and gave it a try.
December 18th, 2008 at 12:38 am
,
It isn’t working on mine either. Nothing seems to be happening even though my model validation is hooked up correctly. Development in rails. Any ideas?
December 23rd, 2008 at 2:42 am
, Rails plugin not installing apparently for me either. Have used ruby script/plugin install svn://rubyforge.org/var/svn/livevalidation from a cmd, , it executes yet no messages (a file being created or something like that). Any suggestions ? Thank you in advance !
March 4th, 2009 at 1:14 pm
, Same here, , installed and nothing is happening. May be rails 2.2.2 broke the plugin ?
March 4th, 2009 at 1:56 pm
, Found It’s doing somthing, , it broke my forms built with formfor I wrote with this syntax:
object.formfield :method, , :options , , I got “wrong number of arguments (2 for 3)”
Looking at the helper, , it look like it is accepting only the syntax:
form_field :object, , :method, , :options
This confirm the plugin is broken in rails 2.2.2
Too bad ):, , I can’t rewrite all my forms, ,
March 4th, 2010 at 6:42 pm
, Hello, , I found this blog post while searching for help with JavaScript. I have recently changed browsers from Chrome to Internet Explorer 7. Now I seem to have a issue with loading JavaScript. Everytime I go on a website that needs Javascript, , the page doesn’t load and I get a “runtime error javascript.JSException: Unknown name”. I can’t seem to find out how to fix the problem. Any help is very appreciated! Thanks
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