hi,
the solution to get the nested fields applied correctly lies in the template::
<input type="hidden" name="__start__" value="${field.name}:mapping"/>
<div tal:repeat="tup subfields">
<div tal:replace="structure rndr(tup[1].widget.template, field=tup[1],
cstruct=tup[0],
parent=field)"/>
</div>
<input type="text"
name="${item_field.name}"
value="${cstruct['location_search']}"
tal:attributes="size field.widget.size;
class field.widget.css_class"
id="${item_field.oid}" />
<input type="hidden" name="__end__" value="${field.name}:mapping"/>
cheers, andi
On 17.06.2012, at 00:44, Andi Balke wrote:
> hi,
>
> i sat on this problem for 10 hours now and i have no idea anymore. if anyone
> could give me a hint, i would really appreciate that.
>
> story: i created a schema for a custom widget, wich renders, the form works,
> all fine so far.
>
> problem: i need to create a nested schema so i can access ``children`` in my
> custom widget to transmit more than only one filed. i had different
> variations of schemas so far, which all kinda work - e.g. render - but on
> validation my problem is i cannot access the POST data of the children in my
> parent-schema.
> now i just wanted to see if i can access them at least in a custom validator
> (http://deformdemo.repoze.org/interfield/), nope. also the preparer just
> doesn't work on the parent-schema.
>
> here is all relevant code, maybe someone spots an error.
>
> thanks, andi
>
> class curry(object):
> """
> class to curry a methods together with fewer arguments.
>
> @see:
> http://code.activestate.com/recipes/52549-curry-associating-parameters-with-a-function/
> """
> def __init__(self, fun, *args, **kwargs):
> self.fun = fun
> self.pending = args[:]
> self.kwargs = kwargs.copy()
>
> def __call__(self, *args, **kwargs):
> if kwargs and self.kwargs:
> kw = self.kwargs.copy()
> kw.update(kwargs)
> else:
> kw = kwargs or self.kwargs
>
> return self.fun(*(self.pending + args), **kw)
>
>
> @colander.deferred
> def create_LocationPickerWidget(node, kw):
> """
> callable to create the widget with a deferred paramater, here
> "request"
>
> gets applied by ``colander.Schema.bind(request=self.request)``
> """
> request = kw["request"]
> return LocationPickerWidget(request)
>
> class Location(colander.MappingSchema):
> location_search = colander.SchemaNode(
> colander.String(),
> name = "location_string.location_search",
> validator=colander.Length(min=1),
> )
> location_point = colander.SchemaNode(
> colander.String(),
> name = "location_string.location_point",
> widget = deform.widget.HiddenWidget(),
> validator=colander.Length(min=1),
> )
>
>
> class LocationPicker(colander.MappingSchema):
> """
> schema only for a step in the form to choose a location
>
> @see
> http://docs.pylonsproject.org/projects/colander/en/latest/manipulation.html
> """
> location_string = Location(
> widget=create_LocationPickerWidget,
> )
>
> @classmethod
> def prepare_location(cls, fieldname, value):
> """
> deform preparer to convert a form submitted location in a real
> location.
>
> appended below
> """
> if log.isEnabledFor(logging.WARN):
> _out = StringIO()
> pprint(value, stream=_out)
> log.warn("%s.%s @%s value: %s", __name__, cls.__name__,
> fieldname, _out.getvalue())
>
> if value:
> lat, lng = value.split(',')
> position = WKTSpatialElement('POINT({0} {1})'.format(lat, lng))
> return position
> return value
>
> # adding a preparer to the mapping node will not work
> LocationPicker.location_string.preparer =\
> curry(LocationPicker.prepare_location, "XX_location_string_XX")
> # those work
> Location.location_search.preparer =\
> curry(LocationPicker.prepare_location, "location_search")
> Location.location_point.preparer =\
> curry(LocationPicker.prepare_location, "location_point")
>
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