[Zope] Setting title in an external method

[Greg Ward]

Hi all --

A common idiom around here is to use an external method to process a
form and, if an error that the user can't fix occurs -- eg. you can't
view such-and-such an object because it doesn't exist, or you don't have
privileges -- use "return" to show them the contents of a DTML method
that explains the problem.

Here's a simple example:

    def my_xm (self, REQUEST=None, RESPONSE=None):
        # ... churn away, processing the form ...
        return self.my_dtml (self, REQUEST, RESPONSE)

Here's the source for the "my_dtml" DTML method:

    <dtml-var standard_html_header>
    title: <b><dtml-var title></b><br>
    document_title: <b><dtml-var document_title></b>
    <p>
    This is the <dtml-var document_id> Document 
    in the <dtml-var title_and_id> Folder.
    </p>
    <dtml-var standard_html_footer>

Both "my_xm" and "my_dtml" are in the root directory of an almost-fresh
Zope 2.1.4 installation.

The problem is that the "title" when I call "my_xm" (ie. the "Title:"
HTTP header and "<TITLE>" HTML tag) is just "Zope", which I presume is
the title *of the folder* containing the external method.  Yuck.  I want
the form result to have a title of its own, eg. "Error Viewing
Blah-blah".

What's the best way to do this?  Possibilities that occur to me:

  * redirect to the error-reporting DTML Method instead (but I like
    to keep the number of redirects to a minimum)
  * use a DTML Document instead of a Method (not sure if this will
    work, and sometimes I really do want it to be a method -- eg.
    it might be called from within a larger Document in some context)
  * set some magical attribute of 'self' or 'RESPONSE' in the external
    method; I tried "RESPONSE.setHeader ('Title', 'My Title')", but
    that didn't work

Any other ideas?  Thanks --

        Greg
-- 
Greg Ward - software developer                    gward@cnri.reston.va.us
Corporation for National Research Initiatives    
1895 Preston White Drive                           voice: +1-703-620-8990
Reston, Virginia, USA  20191-5434                    fax: +1-703-620-0913