-from django.db.models import signals
-from django import forms
-from django.forms.widgets import flatatt
-from django.forms.util import smart_unicode
-from django.utils import simplejson as json
-from django.utils.html import escape
-from django.utils.safestring import mark_safe
-
-
-class JSONEncoder(json.JSONEncoder):
- def default(self, obj):
- if isinstance(obj, datetime.datetime):
- return obj.strftime('%Y-%m-%d %H:%M:%S')
- elif isinstance(obj, datetime.date):
- return obj.strftime('%Y-%m-%d')
- elif isinstance(obj, datetime.time):
- return obj.strftime('%H:%M:%S')
- return json.JSONEncoder.default(self, obj)
-
-
-def dumps(data):
- return JSONEncoder().encode(data)
-
-
-def loads(str):
- return json.loads(str, encoding=settings.DEFAULT_CHARSET)
-
-
-class JSONFormField(forms.CharField):
- widget = forms.Textarea
-
- def clean(self, value):
- try:
- loads(value)
- return value
- except ValueError, e:
- raise forms.ValidationError(_('Enter a valid JSON value. Error: %s') % e)
-
-
-class JSONField(models.TextField):
- def formfield(self, **kwargs):
- defaults = {'form_class': JSONFormField}
- defaults.update(kwargs)
- return super(JSONField, self).formfield(**defaults)
-
- def db_type(self):
- return 'text'