Robert Kosek wrote:
> Is the tag an object, or the actual string output?
Okay, here's what I found.
ActiveView::Base.field_error_proc has two parameters, the HTML output
followed by the actual object itself. Then, field_error_proc is called
within a function within the InstanceTag object which passes itself to
the error procedure.
InstanceTag is not documented, so I'm left with scrounging what I can
get from the source code. Between active_record_helper.rb and
form_helper.rb I have a decent reference.
One problem: the error handler is not aware of the options passed to the
InstanceTag. So, I cannot actually modify the class option and
regenerate the tag. (Not without modifying the source, which I'm not
comfortable with doing yet.) So... gsub here I come.
Here's what I have:
-----
# I put this in the top of application.rb, where should it go?
ActionView::Base.field_error_proc = Proc.new do |html, instance_tag|
if html.match(/class=(\'|\")([\w\s\d]*?)\1/i)
html.gsub(/class=(\'|\")([\w\s\d]*?)\1/i, 'class="\2
fieldWithErrors"')
else
html.gsub(/\<[\w]+/i, '\0 class="fieldWithErrors"')
end
end
yields:
<input class="fieldWithErrors"
<input class="myClass fieldWithErrors"
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