Hi --
The Prototype documentation suggests the following to get form values
by name:
<code>
$F( $( formID )[fieldName] )
</code>
However the above does not work if I have multiple checkboxes or radio
buttons with the same name, since in that case $( formID )[fieldName]
returns a NodeList. I understand the suggestion of using
Form.getInputs() however I prefer to use field names instead so that I
don't have to worry about what type of input a particular field is.
So, I found I can solve this problem by changing
Form.Element.Methods.getValue to support taking a NodeList parameter
as well as a single argument, like so:
<code>
var old$F = Form.Element.Methods.getValue;
/* Handles multiple-valued elements for the case where form[fieldName]
* returns multiple elements (i.e. checkboxes and radio buttons
*/
Form.Element.Methods.getValue = function(element) {
if( element instanceof NodeList )
return $A( element ).collect( function(e) { return
$F(e); } ).compact();
else return old$F( element );
};
var $F = Form.Element.Methods.getValue;
</code>
I don't purport to know anything about Prototype but this seems to
work without breaking backwards compatibility. I also added a new
utility method to get a field value given a form and a field name:
<code>
Form.Element.Methods.getValueByName = function(form, fieldName) {
if( form instanceof String ) form = $(form);
return $F( form[fieldName] );
};
var $FN = Form.Element.Methods.getValueByName;
</code>
Any thoughts on why this might be a _bad_ idea?
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Spinoffs" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/rubyonrails-spinoffs?hl=en
-~----------~----~----~----~------~----~------~--~---
