Using the form validator with at least one field required

[Olivier Girardot]

Hi everyone, 

i'm using the Form.Validator.Inline greatly for my forms, but now i need to specify a validation condition for two fields like "at least one is required", 

i didn't find anything in the documentation, as it seems that validation using class attributes is only on a per-field basis.

Is there any way to do it using Form.Validator.Inline ?

Thanks everyone, 

Regards.

Olivier.

[Aaron Newton]

There is already a validator for this. Note that there seems to be something wrong with the docs for the form validator (the parser is breaking on something), so I can't easily link to it, but you can read about it on github's parsed version:

https://github.com/mootools/mootools-more/blob/master/Docs/Forms/Form.Validator.md

Search for validate-one-required

If that doesn't suit your needs, write your own custom validator; they're pretty easy to write.

[Olivier Girardot]

Thanks Aaron, that's what i did, :

Form.Validator.add('validate-at-least-one-required', {

   errorMsg: 'At least one field is required',

   test: function(element, value){        

       if (element.value.length == 0 && value['validate-at-least-one-required'].value.length == 0) return false;

       else return true;

   }

});

using it like that :

<li><textarea id="positifComment" name="positif_comment" class="validate-at-least-one-required:negatifComment" rows="5" cols="30"></textarea></li> 

<li><textarea id="negatifComment" name="negatif_comment" class="validate-at-least-one-required:positifComment"rows="5" cols="30"></textarea></li>

But what you showed seems to be exactly what i needed :)

Thanks, 

Olivier.

2011/8/14 Aaron Newton <aa...@iminta.com>

[Aaron Newton]

Well, the validator I sent you looks for a shared DOM parent, so your html below wouldn't work. But that's ok; one of the nice things about the validator code is how easy it is to write your own. Seems like you have a solution that works.

[Olivier Girardot]

yeah thx, i'll keep the other one in mind next time, or when the condition will become more complicated.

By the way i didn't find any way to pass more than one argument to the validator. 
something like :

validate-at-least-one-required:{id: negatifComment, type:shared} 

2011/8/14 Aaron Newton <aa...@iminta.com>

[Aaron Newton]

You can specify any number of values in the validator-props; they all get passed.

[Olivier Girardot]

Hi back everyone, 

Like you said Aaron i thought i had a solution that worked, but the "value" object i'm using seems to be only available under Chrome

When i test it on firefox the validator fails and the form gets POSTed 

i think i'll try to use the validator you showed me in the doc, but in the meantime 

any idea about why this behaviour on Firefox ... ?

Thanks again. 

2011/8/14 Aaron Newton <aa...@iminta.com>

[Aaron Newton]

Fiddle it. Off the top of my head, no.

[Olivier Girardot]

i fiddled it http://jsfiddle.net/h6ftB/1/

finally i figured it out, it was mainly an issue the way i used my validators and the way the props variable was filled accross browsers.

Thanks again.

Olivier.

2011/10/5 Aaron Newton <anu...@gmail.com>