annotate pylons_app/model/forms.py @ 234:a0116e944da1

changed naming convention for db modules.
author Marcin Kuzminski <marcin@python-works.com>
date Thu, 27 May 2010 21:31:30 +0200
parents 351013049742
children a55c17874486
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1 """ this is forms validation classes
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2 http://formencode.org/module-formencode.validators.html
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3 for list off all availible validators
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4
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5 we can create our own validators
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6
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7 The table below outlines the options which can be used in a schema in addition to the validators themselves
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8 pre_validators [] These validators will be applied before the schema
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9 chained_validators [] These validators will be applied after the schema
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10 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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11 filter_extra_fields False If True, then keys that aren't associated with a validator are removed
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12 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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13 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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16 <name> = formencode.validators.<name of validator>
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17 <name> must equal form name
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18 list=[1,2,3,4,5]
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19 for SELECT use formencode.All(OneOf(list), Int())
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21 """
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22 from formencode.validators import UnicodeString, OneOf, Int, Number, Regex
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23 from pylons import session
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24 from pylons.i18n.translation import _
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25 from pylons_app.lib.auth import get_crypt_password
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26 from pylons_app.model import meta
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27 from pylons_app.model.db import User
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28 from sqlalchemy.exc import OperationalError
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29 from sqlalchemy.orm.exc import NoResultFound, MultipleResultsFound
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30 from webhelpers.pylonslib.secure_form import authentication_token
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31 import formencode
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32 import logging
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33 log = logging.getLogger(__name__)
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36 #this is needed to translate the messages using _() in validators
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37 class State_obj(object):
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38 _ = staticmethod(_)
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39
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40 #===============================================================================
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41 # VALIDATORS
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42 #===============================================================================
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43 class ValidAuthToken(formencode.validators.FancyValidator):
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44 messages = {'invalid_token':_('Token mismatch')}
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45
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46 def validate_python(self, value, state):
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47
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48 if value != authentication_token():
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49 raise formencode.Invalid(self.message('invalid_token', state,
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50 search_number=value), value, state)
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51
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52 class ValidAuth(formencode.validators.FancyValidator):
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53 messages = {
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54 'invalid_password':_('invalid password'),
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55 'invalid_login':_('invalid user name'),
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56 'disabled_account':_('Your acccount is disabled')
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57
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58 }
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59 #error mapping
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60 e_dict = {'username':messages['invalid_login'],
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61 'password':messages['invalid_password']}
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62 e_dict_disable = {'username':messages['disabled_account']}
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63
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64 def validate_python(self, value, state):
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65 sa = meta.Session
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66 crypted_passwd = get_crypt_password(value['password'])
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67 username = value['username']
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68 try:
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69 user = sa.query(User).filter(User.username == username).one()
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70 except (NoResultFound, MultipleResultsFound, OperationalError) as e:
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71 log.error(e)
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72 user = None
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73 if user:
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74 if user.active:
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75 if user.username == username and user.password == crypted_passwd:
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76 from pylons_app.lib.auth import AuthUser
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77 auth_user = AuthUser()
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78 auth_user.username = username
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79 auth_user.is_authenticated = True
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80 auth_user.is_admin = user.admin
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81 session['hg_app_user'] = auth_user
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82 session.save()
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83 log.info('user %s is now authenticated', username)
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84 return value
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85 else:
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86 log.warning('user %s not authenticated', username)
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87 raise formencode.Invalid(self.message('invalid_password',
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88 state=State_obj), value, state,
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89 error_dict=self.e_dict)
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90 else:
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91 log.warning('user %s is disabled', username)
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92 raise formencode.Invalid(self.message('disabled_account',
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93 state=State_obj),
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94 value, state,
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95 error_dict=self.e_dict_disable)
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99 #===============================================================================
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100 # FORMS
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101 #===============================================================================
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102 class LoginForm(formencode.Schema):
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103 allow_extra_fields = True
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104 filter_extra_fields = True
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105 username = UnicodeString(
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106 strip=True,
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107 min=3,
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108 not_empty=True,
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109 messages={
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110 'empty':_('Please enter a login'),
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111 'tooShort':_('Enter a value %(min)i characters long or more')}
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112 )
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113
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114 password = UnicodeString(
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115 strip=True,
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116 min=3,
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117 not_empty=True,
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118 messages={
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119 'empty':_('Please enter a password'),
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120 'tooShort':_('Enter a value %(min)i characters long or more')}
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121 )
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123
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124 #chained validators have access to all data
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125 chained_validators = [ValidAuth]
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127