[z3-five] ZCML initialization question

[Rob Miller]

hi there,

i'm finally digging in to the z3/five world, have started playing around 
w/ sidnei's "Fate" product 
(https://svn.plone.org/svn/archetypes/Fate/trunk/) to use z3 views for 
my custom archetypes objects.

i've managed to have some proof-of-concept success, using z3 addforms, 
autogenerated from the AT schema, to instantiate AT objects.  when i 
tried to move from my proof-of-concept on to the actual project, 
however, i started hitting some weird ZCML initialization errors.

i have a custom AT class called "OpenProject", which is a registered 
content type within my "OpenPlans" product.  in the OpenPlans 
configure.zcml file, i've got the following tag, modeled after the 
sample in Fate's configure.zcml:

   <fate:addform
      name="add_project"
      for="Products.Fate.tests.sample.interfaces.IAdding"
      permission="zope2.View"
      product="OpenPlans"
      meta_type="OpenProject"
      />

when i start zope, i'm getting a ZopeXMLConfigurationError with the 
following error message:

   ValueError: No archetype registered under the meta_type OpenProject 
for OpenPlans

this is happening because Fate is doing an explicit check for this 
content type when it's parsing the configuration files.  it's raising 
the exception when the following command fails:

   type_info = getType(self.meta_type, self.product)

the thing is, if i remove the configure.zcml file and then restart zope, 
after initialization has finished the above command actually works:

 >>> from Products.Archetypes.ArchetypeTool import getType
 >>> getType('OpenProject', 'OpenPlans')
{'name': 'OpenProject', 'package': 'OpenPlans', 'portal_type': 
'OpenProject', 'module': <module 'Products.OpenPlans.content.project' 
from '/Users/rob/devzope/Products/OpenPlans/content/project.pyc'>, 
'meta_type': 'OpenProject', 'klass': <extension class 
Products.OpenPlans.content.project.OpenProject at 3c24188>, 'signature': 
"\xff>`\x08\x9e%\x872\xf1\xabx\x01#'e\x90", 'identifier': 'Openproject', 
'type': <Schema instance at 3a1c500>, 'schema': <Schema instance at 
3a1c500>}

so the problem seems to be that this content type has not yet been 
initialized at the time when the zcml files are being parsed.  i'm a 
complete newbie when it comes to zcml... is there a way to delay the 
initialization until after this content type has been registered?  is 
there a way to force AT to register this content type directly from the 
zcml file?  i'm at a loss re: how to proceed, since zcml is not python 
none of my familiar debugging tools and techniques are available.

i know this is all a bit Fate-specific, but can anyone help point me in 
the right direction re: how to debug and resolve a problem like this?

thx,

-r