Source code for django.contrib.postgres.forms.jsonb

import json

from django import forms
from django.utils import six
from django.utils.translation import ugettext_lazy as _

__all__ = ['JSONField']


class InvalidJSONInput(six.text_type):
    pass


[docs]class JSONField(forms.CharField): default_error_messages = { 'invalid': _("'%(value)s' value must be valid JSON."), } def __init__(self, **kwargs): kwargs.setdefault('widget', forms.Textarea) super(JSONField, self).__init__(**kwargs) def to_python(self, value): if value in self.empty_values: return None try: return json.loads(value) except ValueError: raise forms.ValidationError( self.error_messages['invalid'], code='invalid', params={'value': value}, ) def bound_data(self, data, initial): if self.disabled: return initial try: return json.loads(data) except ValueError: return InvalidJSONInput(data) def prepare_value(self, value): if isinstance(value, InvalidJSONInput): return value return json.dumps(value)
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