Hi Dan,
I've been struggling a bit with FormEncode too. Here's some
controller code that almost works for me. To make it work, I had to
change line 106 of pylons/decorators/__init__.py tp
response.content = [htmlfill.render(form_content, decoded, errors)]
(Passing 'decoded' instead of 'params', which haven't been through
variable_decode and therefore don't work with multiple values). I'm
not sure whether this is a bug or whether I'm using the decorator
wrongly.
I also don't understand why my LengthOneValidator doesn't raise an
exception for zero items selected, but NotEmpty does. I suspect it
will be obvious in the morning.
Sorry for the poor example. I hope this helps a little.
Graham
from formencodedemo.lib.base import *
from formencode.schema import Schema
from formencode.foreach import ForEach
from formencode.compound import All
from formencode import validators
from formencode.api import Invalid
class LengthOneValidator(validators.FancyValidator):
def validate_python(self, value, state):
if len(value) != 1:
raise Invalid("Please select exactly one thingy", value,
state)
class DemoSchema(Schema):
n = All(ForEach(validators.Int()), LengthOneValidator(),
validators.NotEmpty())
class FormController(BaseController):
def index(self):
return Response("""
<form action="validate" method="post">
<input type="checkbox" name="n" value="1" />1
<input type="checkbox" name="n" value="2" />2
<input type="checkbox" name="n" value="3" />3
<input type="checkbox" name="n" value="4" />4
<input type="submit" />
</form>""")
@validate(schema=DemoSchema, form='index', variable_decode=True)
def validate(self):
return Response(str(self.form_result))
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