def clean(self, data, initial=None):
# If the widget got contradictory inputs, we raise a validation error
if not type(data) in File.__subclasses__():
return data
if data is FILE_INPUT_CONTRADICTION:
raise ValidationError(self.error_messages[u'contradiction'])
# False means the field value should be cleared; further validation is
# not needed.
if data is False:
if not self.required:
return False
# If the field is required, clearing is not possible (the widget
# shouldn't return False data in that case anyway). False is not
# in validators.EMPTY_VALUES; if a False value makes it this far
# it should be validated from here on out as None (so it will be
# caught by the required check).
data = None
return initial if (not data and initial) else super(
FileOrAlreadyExistantFilePathField, self
).clean(data)
from django.core.files.base import File
from django.core.files.uploadedfile import (
InMemoryUploadedFile, TemporaryUploadedFile
)
from django.forms import CharField, MultiValueField, ValidationError, FileField
from django.forms.widgets import FILE_INPUT_CONTRADICTION
from lxml import etree
from . import (
widgets, LANGUAGES, LANGUAGES_REPLACEMENT,
LANGUAGES_REQUIRED_TEXT, REQUIRED_ERROR
)
# This list is used to validate file uploads
FILE_FIELD_CLASSES = File.__subclasses__() + [
TemporaryUploadedFile,
InMemoryUploadedFile
]
class MultiLingualTextField(MultiValueField):
u"""The field used by MultiLingualTextField."""
widget = widgets.MultiLingualTextFieldWidget
def widget_attrs(self, widget):
u"""
Given a Widget instance (*not* a Widget class), returns a dictionary
of any HTML attributes that should be added to the Widget, based on
this Field.
"""
