1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
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
class JSONString(six.text_type):
pass
class JSONField(forms.CharField):
default_error_messages = {
'invalid': _("'%(value)s' value must be valid JSON."),
}
widget = forms.Textarea
def to_python(self, value):
if self.disabled:
return value
if value in self.empty_values:
return None
elif isinstance(value, (list, dict, int, float, JSONString)):
return value
try:
converted = json.loads(value)
except ValueError:
raise forms.ValidationError(
self.error_messages['invalid'],
code='invalid',
params={'value': value},
)
if isinstance(converted, six.text_type):
return JSONString(converted)
else:
return converted
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)
|
