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# -*- coding: utf-8 -*-
#
import json
from django import forms
from django.utils import six
from django.core.exceptions import ValidationError
from django.utils.translation import ugettext as _
from rest_framework import serializers
class DictField(forms.Field):
widget = forms.Textarea
def to_python(self, value):
"""Returns a Python boolean object."""
# Explicitly check for the string 'False', which is what a hidden field
# will submit for False. Also check for '0', since this is what
# RadioSelect will provide. Because bool("True") == bool('1') == True,
# we don't need to handle that explicitly.
if isinstance(value, six.string_types):
try:
value = json.loads(value)
return value
except json.JSONDecodeError:
return ValidationError(_("Not a valid json"))
else:
return ValidationError(_("Not a string type"))
def validate(self, value):
if isinstance(value, ValidationError):
raise value
if not value and self.required:
raise ValidationError(self.error_messages['required'], code='required')
def has_changed(self, initial, data):
# Sometimes data or initial may be a string equivalent of a boolean
# so we should run it through to_python first to get a boolean value
return self.to_python(initial) != self.to_python(data)
class StringIDField(serializers.Field):
def to_representation(self, value):
return {"pk": value.pk, "name": value.__str__()}