[Grok-dev] problems using zc.sourcefactory (was: Re: Adding a image to form_fields)

[Jan Ulrich Hasecke]

Hi,

Am 30.08.2007 um 11:45 schrieb Christian Theune:
> Notice that zc.sourcefactory makes writing sources much easier:
>
> class AnimalImageSource(zc.sourcefactory.basic.BasicSourceFactory):
>
>     base = os.path.join(os.path.dirname(__file__), 'static')
>
>     def getValues(self):
> 	return glob.glob(self.base,  '*.jpg'))
>
>     def getTitle(self, value):
>         file = open(os.path.join(self.base, value))
>         return <magic metadata extraction happens>(file).title  
> images>.
>
> In your form_fields you can then use:
>
>     Choice(title=..., source=AnimalImageSource())
>


after finally solving the problem to install zc.sourcefactory in grok  
I have made this:

---zoo.py

from zc.sourcefactory.basic import BasicSourceFactory

class GehegeListe(BasicSourceFactory):
	def getValues(self):
		return [u'Elefantengehege', u'Giraffengehege', u'Paviankäfig']

class GehegeBauen(grok.AddForm):
	"""The view to add a cage"""
	grok.context(GrokZoo)
	grok.name('gehegebauen')
	form_fields = grok.Fields(
	name=Choice(title=u'Gehege', source=GehegeListe()),
	groesse=Int(title=u"Wieviele Tiere sollen Platz haben?"))
	
	label= u'Neues Gehege bauen'
	@grok.action('Gehege bauen')
	def add(self,name, groesse=8):
		if name in self.context.keys():
			return
			self.redirect(self.url('index'))
		self.context.bauegehege(name, groesse, tierart='default', kosten=100)
		self.redirect(self.url('index'))


After restarting grok and accessing the page gehegebauen I get a  
ComponentLookupError


------
2007-09-03T13:03:09 ERROR SiteError http://localhost:8080/ 
NeanderthalerZoo/gehegebauen
Traceback (most recent call last):
   File "/Users/juh/buildout-eggs/tmpUA_NJV/ 
zope.publisher-3.5.0a1.dev_r78838-py2.4.egg/zope/publisher/ 
publish.py", line 133, in publish
   File "/Users/juh/buildout-eggs/grok-0.10-py2.4.egg/grok/ 
publication.py", line 41, in callObject
     return super(ZopePublicationSansProxy, self).callObject(request,  
ob)
   File "/Users/juh/buildout-eggs/tmpqj7CcV/ 
zope.app.publication-3.4.0a1_2-py2.4.egg/zope/app/publication/ 
zopepublication.py", line 167, in callObject
   File "/Users/juh/buildout-eggs/tmpUA_NJV/ 
zope.publisher-3.5.0a1.dev_r78838-py2.4.egg/zope/publisher/ 
publish.py", line 108, in mapply
    - __traceback_info__: <grokzoo.zoo.GehegeBauen object at 0x386a430>
   File "/Users/juh/buildout-eggs/tmpUA_NJV/ 
zope.publisher-3.5.0a1.dev_r78838-py2.4.egg/zope/publisher/ 
publish.py", line 114, in debug_call
   File "/Users/juh/buildout-eggs/grok-0.10-py2.4.egg/grok/ 
components.py", line 386, in __call__
     self.update_form()
   File "/Users/juh/buildout-eggs/grok-0.10-py2.4.egg/grok/ 
components.py", line 358, in update_form
     super(GrokForm, self).update()
   File "/Users/juh/buildout-eggs/tmpMNReCS/zope.formlib-3.4.0a1- 
py2.4.egg/zope/formlib/form.py", line 736, in update
   File "/Users/juh/buildout-eggs/tmpMNReCS/zope.formlib-3.4.0a1- 
py2.4.egg/zope/formlib/form.py", line 717, in setUpWidgets
   File "/Users/juh/buildout-eggs/tmpMNReCS/zope.formlib-3.4.0a1- 
py2.4.egg/zope/formlib/form.py", line 278, in setUpWidgets
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/_api.py", line 101, in getMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/_api.py", line 114, in queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/registry.py", line 206, in queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpP7VVO8/zope.interface-3.4.0- 
py2.4-macosx-10.3-ppc.egg/zope/interface/adapter.py", line 482, in  
queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/zcml.py", line 151, in factory
   File "/Users/juh/buildout-eggs/tmpsTSVzh/ 
zope.app.form-3.4.0b2.dev_r77626-py2.4.egg/zope/app/form/browser/ 
itemswidgets.py", line 43, in ChoiceInputWidget
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/_api.py", line 101, in getMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/_api.py", line 114, in queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/registry.py", line 206, in queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpP7VVO8/zope.interface-3.4.0- 
py2.4-macosx-10.3-ppc.egg/zope/interface/adapter.py", line 482, in  
queryMultiAdapter
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/zcml.py", line 151, in factory
   File "/Users/juh/buildout-eggs/tmpsTSVzh/ 
zope.app.form-3.4.0b2.dev_r77626-py2.4.egg/zope/app/form/browser/ 
source.py", line 553, in __init__
   File "/Users/juh/buildout-eggs/tmpsTSVzh/ 
zope.app.form-3.4.0b2.dev_r77626-py2.4.egg/zope/app/form/browser/ 
source.py", line 528, in __init__
   File "/Users/juh/buildout-eggs/tmpbRVUh2/zope.component-3.4.0a1- 
py2.4.egg/zope/component/_api.py", line 103, in getMultiAdapter
ComponentLookupError: ((<zc.sourcefactory.source.FactoredSource  
object at 0x3245c30>, <zope.publisher.browser.BrowserRequest instance  
URL=http://localhost:8080/NeanderthalerZoo/gehegebauen>),  
<InterfaceClass zope.app.form.browser.interfaces.ITerms>, u'')
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