django1/django/core/formfields.py

909 lines
37 KiB
Python
Raw Normal View History

from django.core import validators
from django.core.exceptions import PermissionDenied
from django.utils.html import escape
from django.conf.settings import DEFAULT_CHARSET
from django.utils.translation import gettext_lazy, ngettext
FORM_FIELD_ID_PREFIX = 'id_'
class EmptyValue(Exception):
"This is raised when empty data is provided"
pass
class Manipulator:
# List of permission strings. User must have at least one to manipulate.
# None means everybody has permission.
required_permission = ''
def __init__(self):
# List of FormField objects
self.fields = []
def __getitem__(self, field_name):
"Looks up field by field name; raises KeyError on failure"
for field in self.fields:
if field.field_name == field_name:
return field
raise KeyError, "Field %s not found\n%s" % (field_name, repr(self.fields))
def __delitem__(self, field_name):
"Deletes the field with the given field name; raises KeyError on failure"
for i, field in enumerate(self.fields):
if field.field_name == field_name:
del self.fields[i]
return
raise KeyError, "Field %s not found" % field_name
def check_permissions(self, user):
"""Confirms user has required permissions to use this manipulator; raises
PermissionDenied on failure."""
if self.required_permission is None:
return
if user.has_perm(self.required_permission):
return
raise PermissionDenied
def prepare(self, new_data):
"""
Makes any necessary preparations to new_data, in place, before data has
been validated.
"""
for field in self.fields:
field.prepare(new_data)
def get_validation_errors(self, new_data):
"Returns dictionary mapping field_names to error-message lists"
errors = {}
for field in self.fields:
if field.is_required and not new_data.get(field.field_name, False):
errors.setdefault(field.field_name, []).append(gettext_lazy('This field is required.'))
continue
try:
validator_list = field.validator_list
if hasattr(self, 'validate_%s' % field.field_name):
validator_list.append(getattr(self, 'validate_%s' % field.field_name))
for validator in validator_list:
if field.is_required or new_data.get(field.field_name, False) or hasattr(validator, 'always_test'):
try:
if hasattr(field, 'requires_data_list'):
validator(new_data.getlist(field.field_name), new_data)
else:
validator(new_data.get(field.field_name, ''), new_data)
except validators.ValidationError, e:
errors.setdefault(field.field_name, []).extend(e.messages)
# If a CriticalValidationError is raised, ignore any other ValidationErrors
# for this particular field
except validators.CriticalValidationError, e:
errors.setdefault(field.field_name, []).extend(e.messages)
return errors
def save(self, new_data):
"Saves the changes and returns the new object"
# changes is a dictionary-like object keyed by field_name
raise NotImplementedError
def do_html2python(self, new_data):
"""
Convert the data from HTML data types to Python datatypes, changing the
object in place. This happens after validation but before storage. This
must happen after validation because html2python functions aren't
expected to deal with invalid input.
"""
for field in self.fields:
field.convert_post_data(new_data)
class FormWrapper:
"""
A wrapper linking a Manipulator to the template system.
This allows dictionary-style lookups of formfields. It also handles feeding
prepopulated data and validation error messages to the formfield objects.
"""
def __init__(self, manipulator, data, error_dict, edit_inline=True):
self.manipulator, self.data = manipulator, data
self.error_dict = error_dict
self._inline_collections = None
self.edit_inline = edit_inline
def __repr__(self):
return repr(self.__dict__)
def __getitem__(self, key):
for field in self.manipulator.fields:
if field.field_name == key:
data = field.extract_data(self.data)
return FormFieldWrapper(field, data, self.error_dict.get(field.field_name, []))
if self.edit_inline:
self.fill_inline_collections()
for inline_collection in self._inline_collections:
if inline_collection.name == key:
return inline_collection
raise KeyError, "Could not find Formfield or InlineObjectCollection named %r" % key
def fill_inline_collections(self):
if not self._inline_collections:
ic = []
related_objects = self.manipulator.get_related_objects()
for rel_obj in related_objects:
data = rel_obj.extract_data(self.data)
inline_collection = InlineObjectCollection(self.manipulator, rel_obj, data, self.error_dict)
ic.append(inline_collection)
self._inline_collections = ic
def has_errors(self):
return self.error_dict != {}
def _get_fields(self):
try:
return self._fields
except AttributeError:
self._fields = [self.__getitem__(field.field_name) for field in self.manipulator.fields]
return self._fields
fields = property(_get_fields)
class FormFieldWrapper:
"A bridge between the template system and an individual form field. Used by FormWrapper."
def __init__(self, formfield, data, error_list):
self.formfield, self.data, self.error_list = formfield, data, error_list
self.field_name = self.formfield.field_name # for convenience in templates
def __str__(self):
"Renders the field"
return str(self.formfield.render(self.data))
def __repr__(self):
return '<FormFieldWrapper for "%s">' % self.formfield.field_name
def field_list(self):
"""
Like __str__(), but returns a list. Use this when the field's render()
method returns a list.
"""
return self.formfield.render(self.data)
def errors(self):
return self.error_list
def html_error_list(self):
if self.errors():
return '<ul class="errorlist"><li>%s</li></ul>' % '</li><li>'.join([escape(e) for e in self.errors()])
else:
return ''
def get_id(self):
return self.formfield.get_id()
class FormFieldCollection(FormFieldWrapper):
"A utility class that gives the template access to a dict of FormFieldWrappers"
def __init__(self, formfield_dict):
self.formfield_dict = formfield_dict
def __str__(self):
return str(self.formfield_dict)
def __getitem__(self, template_key):
"Look up field by template key; raise KeyError on failure"
return self.formfield_dict[template_key]
def __repr__(self):
return "<FormFieldCollection: %s>" % self.formfield_dict
def errors(self):
"Returns list of all errors in this collection's formfields"
errors = []
for field in self.formfield_dict.values():
if hasattr(field, 'errors'):
errors.extend(field.errors())
return errors
def has_errors(self):
return bool(len(self.errors()))
def html_combined_error_list(self):
return ''.join([field.html_error_list() for field in self.formfield_dict.values() if hasattr(field, 'errors')])
class InlineObjectCollection:
"An object that acts like a list of form field collections."
def __init__(self, parent_manipulator, rel_obj, data, errors):
self.parent_manipulator = parent_manipulator
self.rel_obj = rel_obj
self.data = data
self.errors = errors
self._collections = None
self.name = rel_obj.name
def __len__(self):
self.fill()
return self._collections.__len__()
def __getitem__(self, k):
self.fill()
return self._collections.__getitem__(k)
def __setitem__(self, k, v):
self.fill()
return self._collections.__setitem__(k,v)
def __delitem__(self, k):
self.fill()
return self._collections.__delitem__(k)
def __iter__(self):
self.fill()
return self._collections.__iter__()
def fill(self):
if self._collections:
return
else:
var_name = self.rel_obj.opts.object_name.lower()
wrapper = []
orig = hasattr(self.parent_manipulator, 'original_object') and self.parent_manipulator.original_object or None
orig_list = self.rel_obj.get_list(orig)
for i, instance in enumerate(orig_list):
collection = {'original': instance}
for f in self.rel_obj.editable_fields():
for field_name in f.get_manipulator_field_names(''):
full_field_name = '%s.%d.%s' % (var_name, i, field_name)
field = self.parent_manipulator[full_field_name]
data = field.extract_data(self.data)
errors = self.errors.get(full_field_name, [])
collection[field_name] = FormFieldWrapper(field, data, errors)
wrapper.append(FormFieldCollection(collection))
self._collections = wrapper
class FormField:
"""Abstract class representing a form field.
Classes that extend FormField should define the following attributes:
field_name
The field's name for use by programs.
validator_list
A list of validation tests (callback functions) that the data for
this field must pass in order to be added or changed.
is_required
A Boolean. Is it a required field?
Subclasses should also implement a render(data) method, which is responsible
for rending the form field in XHTML.
"""
def __str__(self):
return self.render('')
def __repr__(self):
return 'FormField "%s"' % self.field_name
def prepare(self, new_data):
"Hook for doing something to new_data (in place) before validation."
pass
def html2python(data):
"Hook for converting an HTML datatype (e.g. 'on' for checkboxes) to a Python type"
return data
html2python = staticmethod(html2python)
def render(self, data):
raise NotImplementedError
def get_member_name(self):
if hasattr(self, 'member_name'):
return self.member_name
else:
return self.field_name
def extract_data(self, data_dict):
if hasattr(self, 'requires_data_list') and hasattr(data_dict, 'getlist'):
data = data_dict.getlist(self.get_member_name())
else:
data = data_dict.get(self.get_member_name(), None)
if data is None:
data = ''
return data
def convert_post_data(self, new_data):
name = self.get_member_name()
if new_data.has_key(self.field_name):
d = new_data.getlist(self.field_name)
try:
converted_data = [self.__class__.html2python(data) for data in d]
except ValueError:
converted_data = d
new_data.setlist(name, converted_data)
else:
try:
# individual fields deal with None values themselves
new_data.setlist(name, [self.__class__.html2python(None)])
except EmptyValue:
new_data.setlist(name, [])
def get_id(self):
"Returns the HTML 'id' attribute for this form field."
return FORM_FIELD_ID_PREFIX + self.field_name
####################
# GENERIC WIDGETS #
####################
class TextField(FormField):
input_type = "text"
def __init__(self, field_name, length=30, maxlength=None, is_required=False, validator_list=[]):
self.field_name = field_name
self.length, self.maxlength = length, maxlength
self.is_required = is_required
self.validator_list = [self.isValidLength, self.hasNoNewlines] + validator_list
def isValidLength(self, data, form):
if data and self.maxlength and len(data.decode(DEFAULT_CHARSET)) > self.maxlength:
raise validators.ValidationError, ngettext("Ensure your text is less than %s character.",
"Ensure your text is less than %s characters.", self.maxlength) % self.maxlength
def hasNoNewlines(self, data, form):
if data and '\n' in data:
raise validators.ValidationError, _("Line breaks are not allowed here.")
def render(self, data):
if data is None:
data = ''
maxlength = ''
if self.maxlength:
maxlength = 'maxlength="%s" ' % self.maxlength
if isinstance(data, unicode):
data = data.encode(DEFAULT_CHARSET)
return '<input type="%s" id="%s" class="v%s%s" name="%s" size="%s" value="%s" %s/>' % \
(self.input_type, self.get_id(), self.__class__.__name__, self.is_required and ' required' or '',
self.field_name, self.length, escape(data), maxlength)
def html2python(data):
return data
html2python = staticmethod(html2python)
class PasswordField(TextField):
input_type = "password"
class LargeTextField(TextField):
def __init__(self, field_name, rows=10, cols=40, is_required=False, validator_list=[], maxlength=None):
self.field_name = field_name
self.rows, self.cols, self.is_required = rows, cols, is_required
self.validator_list = validator_list[:]
if maxlength:
self.validator_list.append(self.isValidLength)
self.maxlength = maxlength
def render(self, data):
if data is None:
data = ''
if isinstance(data, unicode):
data = data.encode(DEFAULT_CHARSET)
return '<textarea id="%s" class="v%s%s" name="%s" rows="%s" cols="%s">%s</textarea>' % \
(self.get_id(), self.__class__.__name__, self.is_required and ' required' or '',
self.field_name, self.rows, self.cols, escape(data))
class HiddenField(FormField):
def __init__(self, field_name, is_required=False, validator_list=[]):
self.field_name, self.is_required = field_name, is_required
self.validator_list = validator_list[:]
def render(self, data):
return '<input type="hidden" id="%s" name="%s" value="%s" />' % \
(self.get_id(), self.field_name, escape(data))
class CheckboxField(FormField):
def __init__(self, field_name, checked_by_default=False):
self.field_name = field_name
self.checked_by_default = checked_by_default
self.is_required, self.validator_list = False, [] # because the validator looks for these
def render(self, data):
checked_html = ''
if data or (data is '' and self.checked_by_default):
checked_html = ' checked="checked"'
return '<input type="checkbox" id="%s" class="v%s" name="%s"%s />' % \
(self.get_id(), self.__class__.__name__,
self.field_name, checked_html)
def html2python(data):
"Convert value from browser ('on' or '') to a Python boolean"
if data == 'on':
return True
return False
html2python = staticmethod(html2python)
class SelectField(FormField):
def __init__(self, field_name, choices=[], size=1, is_required=False, validator_list=[], member_name=None):
self.field_name = field_name
# choices is a list of (value, human-readable key) tuples because order matters
self.choices, self.size, self.is_required = choices, size, is_required
self.validator_list = [self.isValidChoice] + validator_list
if member_name != None:
self.member_name = member_name
def render(self, data):
output = ['<select id="%s" class="v%s%s" name="%s" size="%s">' % \
(self.get_id(), self.__class__.__name__,
self.is_required and ' required' or '', self.field_name, self.size)]
str_data = str(data) # normalize to string
for value, display_name in self.choices:
selected_html = ''
if str(value) == str_data:
selected_html = ' selected="selected"'
output.append(' <option value="%s"%s>%s</option>' % (escape(value), selected_html, display_name))
output.append(' </select>')
return '\n'.join(output)
def isValidChoice(self, data, form):
str_data = str(data)
str_choices = [str(item[0]) for item in self.choices]
if str_data not in str_choices:
raise validators.ValidationError, _("Select a valid choice; '%(data)s' is not in %(choices)s.") % {'data': str_data, 'choices': str_choices}
class NullSelectField(SelectField):
"This SelectField converts blank fields to None"
def html2python(data):
if not data:
return None
return data
html2python = staticmethod(html2python)
class RadioSelectField(FormField):
def __init__(self, field_name, choices=[], ul_class='', is_required=False, validator_list=[], member_name=None):
self.field_name = field_name
# choices is a list of (value, human-readable key) tuples because order matters
self.choices, self.is_required = choices, is_required
self.validator_list = [self.isValidChoice] + validator_list
self.ul_class = ul_class
if member_name != None:
self.member_name = member_name
def render(self, data):
"""
Returns a special object, RadioFieldRenderer, that is iterable *and*
has a default str() rendered output.
This allows for flexible use in templates. You can just use the default
rendering:
{{ field_name }}
...which will output the radio buttons in an unordered list.
Or, you can manually traverse each radio option for special layout:
{% for option in field_name.field_list %}
{{ option.field }} {{ option.label }}<br />
{% endfor %}
"""
class RadioFieldRenderer:
def __init__(self, datalist, ul_class):
self.datalist, self.ul_class = datalist, ul_class
def __str__(self):
"Default str() output for this radio field -- a <ul>"
output = ['<ul%s>' % (self.ul_class and ' class="%s"' % self.ul_class or '')]
output.extend(['<li>%s %s</li>' % (d['field'], d['label']) for d in self.datalist])
output.append('</ul>')
return ''.join(output)
def __iter__(self):
for d in self.datalist:
yield d
def __len__(self):
return len(self.datalist)
datalist = []
str_data = str(data) # normalize to string
for i, (value, display_name) in enumerate(self.choices):
selected_html = ''
if str(value) == str_data:
selected_html = ' checked="checked"'
datalist.append({
'value': value,
'name': display_name,
'field': '<input type="radio" id="%s" name="%s" value="%s"%s/>' % \
(self.get_id() + '_' + str(i), self.field_name, value, selected_html),
'label': '<label for="%s">%s</label>' % \
(self.get_id() + '_' + str(i), display_name),
})
return RadioFieldRenderer(datalist, self.ul_class)
def isValidChoice(self, data, form):
str_data = str(data)
str_choices = [str(item[0]) for item in self.choices]
if str_data not in str_choices:
raise validators.ValidationError, _("Select a valid choice; '%(data)s' is not in %(choices)s.") % {'data':str_data, 'choices':str_choices}
class NullBooleanField(SelectField):
"This SelectField provides 'Yes', 'No' and 'Unknown', mapping results to True, False or None"
def __init__(self, field_name, is_required=False, validator_list=[]):
SelectField.__init__(self, field_name, choices=[('1', 'Unknown'), ('2', 'Yes'), ('3', 'No')],
is_required=is_required, validator_list=validator_list)
def render(self, data):
if data is None: data = '1'
elif data == True: data = '2'
elif data == False: data = '3'
return SelectField.render(self, data)
def html2python(data):
return {'1': None, '2': True, '3': False}[data]
html2python = staticmethod(html2python)
class SelectMultipleField(SelectField):
requires_data_list = True
def render(self, data):
output = ['<select id="%s" class="v%s%s" name="%s" size="%s" multiple="multiple">' % \
(self.get_id(), self.__class__.__name__, self.is_required and ' required' or '',
self.field_name, self.size)]
str_data_list = map(str, data) # normalize to strings
for value, choice in self.choices:
selected_html = ''
if str(value) in str_data_list:
selected_html = ' selected="selected"'
output.append(' <option value="%s"%s>%s</option>' % (escape(value), selected_html, choice))
output.append(' </select>')
return '\n'.join(output)
def isValidChoice(self, field_data, all_data):
# data is something like ['1', '2', '3']
str_choices = [str(item[0]) for item in self.choices]
for val in map(str, field_data):
if val not in str_choices:
raise validators.ValidationError, _("Select a valid choice; '%(data)s' is not in %(choices)s.") % {'data':val, 'choices':str_choices}
def html2python(data):
if data is None:
raise EmptyValue
return data
html2python = staticmethod(html2python)
class CheckboxSelectMultipleField(SelectMultipleField):
"""
This has an identical interface to SelectMultipleField, except the rendered
widget is different. Instead of a <select multiple>, this widget outputs a
<ul> of <input type="checkbox">es.
Of course, that results in multiple form elements for the same "single"
field, so this class's prepare() method flattens the split data elements
back into the single list that validators, renderers and save() expect.
"""
requires_data_list = True
def __init__(self, field_name, choices=[], validator_list=[]):
SelectMultipleField.__init__(self, field_name, choices, size=1, is_required=False, validator_list=validator_list)
def prepare(self, new_data):
# new_data has "split" this field into several fields, so flatten it
# back into a single list.
data_list = []
for value, _ in self.choices:
if new_data.get('%s%s' % (self.field_name, value), '') == 'on':
data_list.append(value)
new_data.setlist(self.field_name, data_list)
def render(self, data):
output = ['<ul>']
str_data_list = map(str, data) # normalize to strings
for value, choice in self.choices:
checked_html = ''
if str(value) in str_data_list:
checked_html = ' checked="checked"'
field_name = '%s%s' % (self.field_name, value)
output.append('<li><input type="checkbox" id="%s" class="v%s" name="%s"%s /> <label for="%s">%s</label></li>' % \
(self.get_id() + value , self.__class__.__name__, field_name, checked_html,
self.get_id() + value, choice))
output.append('</ul>')
return '\n'.join(output)
####################
# FILE UPLOADS #
####################
class FileUploadField(FormField):
def __init__(self, field_name, is_required=False, validator_list=[]):
self.field_name, self.is_required = field_name, is_required
self.validator_list = [self.isNonEmptyFile] + validator_list
def isNonEmptyFile(self, field_data, all_data):
if not field_data['content']:
raise validators.CriticalValidationError, _("The submitted file is empty.")
def render(self, data):
return '<input type="file" id="%s" class="v%s" name="%s" />' % \
(self.get_id(), self.__class__.__name__, self.field_name)
def html2python(data):
if data is None:
raise EmptyValue
return data
html2python = staticmethod(html2python)
class ImageUploadField(FileUploadField):
"A FileUploadField that raises CriticalValidationError if the uploaded file isn't an image."
def __init__(self, *args, **kwargs):
FileUploadField.__init__(self, *args, **kwargs)
self.validator_list.insert(0, self.isValidImage)
def isValidImage(self, field_data, all_data):
try:
validators.isValidImage(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
####################
# INTEGERS/FLOATS #
####################
class IntegerField(TextField):
def __init__(self, field_name, length=10, maxlength=None, is_required=False, validator_list=[], member_name=None):
validator_list = [self.isInteger] + validator_list
if member_name is not None:
self.member_name = member_name
TextField.__init__(self, field_name, length, maxlength, is_required, validator_list)
def isInteger(self, field_data, all_data):
try:
validators.isInteger(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
if data == '' or data is None:
return None
return int(data)
html2python = staticmethod(html2python)
class SmallIntegerField(IntegerField):
def __init__(self, field_name, length=5, maxlength=5, is_required=False, validator_list=[]):
validator_list = [self.isSmallInteger] + validator_list
IntegerField.__init__(self, field_name, length, maxlength, is_required, validator_list)
def isSmallInteger(self, field_data, all_data):
if not -32768 <= int(field_data) <= 32767:
raise validators.CriticalValidationError, _("Enter a whole number between -32,768 and 32,767.")
class PositiveIntegerField(IntegerField):
def __init__(self, field_name, length=10, maxlength=None, is_required=False, validator_list=[]):
validator_list = [self.isPositive] + validator_list
IntegerField.__init__(self, field_name, length, maxlength, is_required, validator_list)
def isPositive(self, field_data, all_data):
if int(field_data) < 0:
raise validators.CriticalValidationError, _("Enter a positive number.")
class PositiveSmallIntegerField(IntegerField):
def __init__(self, field_name, length=5, maxlength=None, is_required=False, validator_list=[]):
validator_list = [self.isPositiveSmall] + validator_list
IntegerField.__init__(self, field_name, length, maxlength, is_required, validator_list)
def isPositiveSmall(self, field_data, all_data):
if not 0 <= int(field_data) <= 32767:
raise validators.CriticalValidationError, _("Enter a whole number between 0 and 32,767.")
class FloatField(TextField):
def __init__(self, field_name, max_digits, decimal_places, is_required=False, validator_list=[]):
self.max_digits, self.decimal_places = max_digits, decimal_places
validator_list = [self.isValidFloat] + validator_list
TextField.__init__(self, field_name, max_digits+1, max_digits+1, is_required, validator_list)
def isValidFloat(self, field_data, all_data):
v = validators.IsValidFloat(self.max_digits, self.decimal_places)
try:
v(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
if data == '' or data is None:
return None
return float(data)
html2python = staticmethod(html2python)
####################
# DATES AND TIMES #
####################
class DatetimeField(TextField):
"""A FormField that automatically converts its data to a datetime.datetime object.
The data should be in the format YYYY-MM-DD HH:MM:SS."""
def __init__(self, field_name, length=30, maxlength=None, is_required=False, validator_list=[]):
self.field_name = field_name
self.length, self.maxlength = length, maxlength
self.is_required = is_required
self.validator_list = [validators.isValidANSIDatetime] + validator_list
def html2python(data):
"Converts the field into a datetime.datetime object"
import datetime
date, time = data.split()
y, m, d = date.split('-')
timebits = time.split(':')
h, mn = timebits[:2]
if len(timebits) > 2:
s = int(timebits[2])
else:
s = 0
return datetime.datetime(int(y), int(m), int(d), int(h), int(mn), s)
html2python = staticmethod(html2python)
class DateField(TextField):
"""A FormField that automatically converts its data to a datetime.date object.
The data should be in the format YYYY-MM-DD."""
def __init__(self, field_name, is_required=False, validator_list=[]):
validator_list = [self.isValidDate] + validator_list
TextField.__init__(self, field_name, length=10, maxlength=10,
is_required=is_required, validator_list=validator_list)
def isValidDate(self, field_data, all_data):
try:
validators.isValidANSIDate(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
"Converts the field into a datetime.date object"
import time, datetime
try:
time_tuple = time.strptime(data, '%Y-%m-%d')
return datetime.date(*time_tuple[0:3])
except (ValueError, TypeError):
return None
html2python = staticmethod(html2python)
class TimeField(TextField):
"""A FormField that automatically converts its data to a datetime.time object.
The data should be in the format HH:MM:SS."""
def __init__(self, field_name, is_required=False, validator_list=[]):
validator_list = [self.isValidTime] + validator_list
TextField.__init__(self, field_name, length=8, maxlength=8,
is_required=is_required, validator_list=validator_list)
def isValidTime(self, field_data, all_data):
try:
validators.isValidANSITime(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
"Converts the field into a datetime.time object"
import time, datetime
try:
try:
time_tuple = time.strptime(data, '%H:%M:%S')
except ValueError: # seconds weren't provided
time_tuple = time.strptime(data, '%H:%M')
return datetime.time(*time_tuple[3:6])
except (ValueError, TypeError):
return None
html2python = staticmethod(html2python)
####################
# INTERNET-RELATED #
####################
class EmailField(TextField):
"A convenience FormField for validating e-mail addresses"
def __init__(self, field_name, length=50, maxlength=75, is_required=False, validator_list=[]):
validator_list = [self.isValidEmail] + validator_list
TextField.__init__(self, field_name, length, maxlength=maxlength,
is_required=is_required, validator_list=validator_list)
def isValidEmail(self, field_data, all_data):
try:
validators.isValidEmail(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
class URLField(TextField):
"A convenience FormField for validating URLs"
def __init__(self, field_name, length=50, is_required=False, validator_list=[]):
validator_list = [self.isValidURL] + validator_list
TextField.__init__(self, field_name, length=length, maxlength=200,
is_required=is_required, validator_list=validator_list)
def isValidURL(self, field_data, all_data):
try:
validators.isValidURL(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
class IPAddressField(TextField):
def __init__(self, field_name, length=15, maxlength=15, is_required=False, validator_list=[]):
validator_list = [self.isValidIPAddress] + validator_list
TextField.__init__(self, field_name, length=length, maxlength=maxlength,
is_required=is_required, validator_list=validator_list)
def isValidIPAddress(self, field_data, all_data):
try:
validators.isValidIPAddress4(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
return data or None
html2python = staticmethod(html2python)
####################
# MISCELLANEOUS #
####################
class FilePathField(SelectField):
"A SelectField whose choices are the files in a given directory."
def __init__(self, field_name, path, match=None, recursive=False, is_required=False, validator_list=[]):
import os
if match is not None:
import re
match_re = re.compile(match)
choices = []
if recursive:
for root, dirs, files in os.walk(path):
for f in files:
if match is None or match_re.search(f):
choices.append((os.path.join(path, f), f))
else:
try:
for f in os.listdir(path):
full_file = os.path.join(path, f)
if os.path.isfile(full_file) and (match is None or match_re.search(f)):
choices.append((full_file, f))
except OSError:
pass
SelectField.__init__(self, field_name, choices, 1, is_required, validator_list)
class PhoneNumberField(TextField):
"A convenience FormField for validating phone numbers (e.g. '630-555-1234')"
def __init__(self, field_name, is_required=False, validator_list=[]):
validator_list = [self.isValidPhone] + validator_list
TextField.__init__(self, field_name, length=12, maxlength=12,
is_required=is_required, validator_list=validator_list)
def isValidPhone(self, field_data, all_data):
try:
validators.isValidPhone(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
class USStateField(TextField):
"A convenience FormField for validating U.S. states (e.g. 'IL')"
def __init__(self, field_name, is_required=False, validator_list=[]):
validator_list = [self.isValidUSState] + validator_list
TextField.__init__(self, field_name, length=2, maxlength=2,
is_required=is_required, validator_list=validator_list)
def isValidUSState(self, field_data, all_data):
try:
validators.isValidUSState(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
def html2python(data):
return data.upper() # Should always be stored in upper case
html2python = staticmethod(html2python)
class CommaSeparatedIntegerField(TextField):
"A convenience FormField for validating comma-separated integer fields"
def __init__(self, field_name, maxlength=None, is_required=False, validator_list=[]):
validator_list = [self.isCommaSeparatedIntegerList] + validator_list
TextField.__init__(self, field_name, length=20, maxlength=maxlength,
is_required=is_required, validator_list=validator_list)
def isCommaSeparatedIntegerList(self, field_data, all_data):
try:
validators.isCommaSeparatedIntegerList(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages
class RawIdAdminField(CommaSeparatedIntegerField):
def html2python(data):
return data.split(',');
html2python = classmethod(html2python)
class XMLLargeTextField(LargeTextField):
"""
A LargeTextField with an XML validator. The schema_path argument is the
full path to a Relax NG compact schema to validate against.
"""
def __init__(self, field_name, schema_path, **kwargs):
self.schema_path = schema_path
kwargs.setdefault('validator_list', []).insert(0, self.isValidXML)
LargeTextField.__init__(self, field_name, **kwargs)
def isValidXML(self, field_data, all_data):
v = validators.RelaxNGCompact(self.schema_path)
try:
v(field_data, all_data)
except validators.ValidationError, e:
raise validators.CriticalValidationError, e.messages