form conversion error messages (was: [Zope] virtual hosting and error messages)

[Dieter Maurer]

ed colmar writes:
 > ....
 >     When filling out a form, I have a value that is being passed to zope as
 > "cost:int"
 > 
 >     The form works fine when filled out correctly, but returns an error if
 > this field is left blank.  Now, this is the behaviour that I want, but I'm
 > trying to track down where the error page comes from.  This is different
 > than "standard_error", and the really peculiar thing about it is that it
 > pulls in the "standard_html" header and footer from the root folder, which
 > happens to be a completely different host.
The reason:

  Form value conversions are almost the first thing, ZPublisher
  tries for a new request. It happens well before
  traversal. Therefore, only the root context is available.

When you need more control over the error messages,
tools such as "Formulator" or "dtml-contract (I think, a GPL
product), will help you.


Dieter