[Grok-dev] Static dir with grok.PageTemplateFile

Sun May 13 18:05:46 UTC 2012

I have a few forms in separate modules that share the same template. Rather 
than having the template in the <module_name>_templates/ directory, I've got 
this one 'edit-form.pt' template in the bottom, src/ directory.

It worked fine, until I added a (conditional) include in the head of the page 
template, so that it downloads a CSS stylesheet if the form request wasn't 
done through an AJAX call.

So I'm getting an error now, whenever I request one of the forms which use 
this template, as it fails to find the static directory holding the CSS. I've 
tried adding `resource.style.need()` to the forms' update methods, but they 
still don't find the static directory. Part of the traceback shows this:-

Line 5, Column 10
In expression: <PathExpr standard:u'static/css/style.css'>

   - Names:
      {'args': (),
       'context': <server.app.Server object at 0x7f4878033668>,
       'default': <object object at 0x7f4891c0a490>,
       'loop': {},
       'nothing': None,
       'options': {},
       'repeat': {},
       'request': <zope.publisher.browser.BrowserRequest instance 
URL=http://localhost:8080/develop2/addSQLdatabase>,
       'static': None,
       'template': <grokcore.view.components.TrustedFilePageTemplate object at 
0x40bc8d0>,
       'view': <server.BrowseSQL.AddSQLDatabaseForm object at 0x4b246d0>}

I reckon the problem is where it says: 'static' : None, but I don't know how 
to rectify that...

The class declaration I have for this form is:-

class AddSQLDatabaseForm(grok.AddForm):
    grok.context(Server)
    grok.implements(ISQLDatabase)
    grok.name('addSQLdatabase')
    form_fields = grok.AutoFields(ISQLDatabase)
    label = 'Add SQL database'
    template = grok.PageTemplateFile("edit-form.pt")
    @grok.action('New SQL database')
    def new_database(self,**kwargs):
        database = SQLDatabase(**kwargs)
        database.creator = self.request.principal.title
        database.creation_date = datetime.datetime.now()
        database.modification_date = datetime.datetime.now()
        dbname = kwargs.pop('database')
        self.context[dbname] = database
    def update(self):
        resource.style.need()

The relevant part of the page template file (edit-form.pt) is:-

<metal:block tal:condition="python:request.get('HTTP_X_REQUESTED_WITH',None) 
!='XMLHttpRequest'" >
    <head>
          <link rel="stylesheet" type="text/css" tal:attributes="href 
static/css/style.css">
    </head>
</metal:block>

Any idea why it can't find the CSS file? That same tal:attributes URL works in 
all the module-specific page templates. Why not with this generic form 
template?

Thanks for any and all help,
Alex
-- 
Alex Leach BSc. MRes.
Department of Biology
University of York
York YO10 5DD
United Kingdom
www: http://bioltfws1.york.ac.uk/~albl500
EMAIL DISCLAIMER: http://www.york.ac.uk/docs/disclaimer/email.htm
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