[webpy] dropdown in GAE

[ProfessionalIT]

Friends,

How create a form.Dropdown() control that run in GAE?

I have this code that don't run in GAE:

# in the forms.py
result = data.all_categories() # this method return all records of
table category in GAE/big table format.
args = [(row.key().id(), row.title) for row in result]

new_post = form.Form(
form.Dropdown('category', args),
form.Textbox('title'),
form.Textarea('text'),
form.Dropdown('language', [('pt', 'Portuguese'), ('en',
'English')]),
form.Button('Submit!')

# in app.py
class Post:
def GET(self):
frm = forms.new_post()
return render.full(render.form(frm))

def POST(self):
global last_updated
frm = forms.new_post()
if frm.validates():
data.save_entry(frm.d)
last_updated = data.last_updated()
raise web.seeother('/')
else:
return render.full(render.form(frm))

-- Leandro.

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[ProfessionalIT]

The problem is in the forms.py in this function:

def attrget(obj, attr, value=None):
if hasattr(obj, 'has_key') and obj.has_key(attr): return obj[attr]
if hasattr(obj, attr): return getattr(obj, attr)
return value

generate this error:

<type 'exceptions.AttributeError'>: 'unicode' object has no attribute
'has_key'
args = ("'unicode' object has no attribute 'has_key'",)
message = "'unicode' object has no attribute 'has_key'"

[ProfessionalIT]

Friends,

any idea how to solve this problem ?
The error occur in the form.validates() in the POST method.

IMHO the root cause of the problem is the 'big table' format, I
say this because the form generated by the GET method is correct(It
has the <option value="1">Category A</option>, <option
value="2">Category B</option>) but when I submit the form and the
forms.validates() is called the error occurs.

someone has a form like this running on Google App Engine?

Thanks,

best regards,
Leandro.

[ProfessionalIT]

The solution in this thread:

http://groups.google.com/group/webpy/browse_thread/thread/484cb3fadac5de32/94634856c335d001#94634856c335d001

Thanks.