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""" this is forms validation classes
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http://formencode.org/module-formencode.validators.html
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for list off all availible validators
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we can create our own validators
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The table below outlines the options which can be used in a schema in addition to the validators themselves
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pre_validators [] These validators will be applied before the schema
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chained_validators [] These validators will be applied after the schema
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allow_extra_fields False If True, then it is not an error when keys that aren't associated with a validator are present
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filter_extra_fields False If True, then keys that aren't associated with a validator are removed
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if_key_missing NoDefault If this is given, then any keys that aren't available but are expected will be replaced with this value (and then validated). This does not override a present .if_missing attribute on validators. NoDefault is a special FormEncode class to mean that no default values has been specified and therefore missing keys shouldn't take a default value.
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ignore_key_missing False If True, then missing keys will be missing in the result, if the validator doesn't have .if_missing on it already
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<name> = formencode.validators.<name of validator>
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<name> must equal form name
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list=[1,2,3,4,5]
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for select use formencode.All(OneOf(list), Int())
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"""
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import formencode
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from formencode.validators import UnicodeString, OneOf, Int, Number, Regex
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from pylons.i18n.translation import _
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from webhelpers.pylonslib.secure_form import authentication_token
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class ValidAuthToken(formencode.validators.FancyValidator):
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messages = {'invalid_token':_('Token mismatch')}
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def validate_python(self, value, state):
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if value != authentication_token():
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raise formencode.Invalid(self.message('invalid_token', state, search_number = value), value, state)
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class WireTransferForm(object):
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'''
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A factory wrapper class. It might return the instance of class for a validation, but also it can
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return the list for select fields values.
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@param ret_type: type to return defaut: 'class'
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'''
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#class attributes here
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#it might be fetched from db,from models and so on
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recipients_list = [
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(1, 'a'),
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(2, 'b')
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]
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def _form(self):
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class _WireTransferForm(formencode.Schema):
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allow_extra_fields = True
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_authentication_token = ValidAuthToken()
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account_number = Regex(r'[0-9]{26}', not_empty = True, messages = {
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'invalid': _("Account number is invalid, it must be 26 digits")})
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title = UnicodeString(not_empty = True, min = 3, strip = True)
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recipient = formencode.All(OneOf([i[0] for i in WireTransferForm.recipients_list],
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testValueList = True, hideList = True), Int())
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recipient_address = UnicodeString(not_empty = True, strip = True)
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amount = Number(not_empty = True, min = 1)
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return _WireTransferForm()
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