33 lines
898 B
Python
33 lines
898 B
Python
import json
|
|
|
|
from django.utils import six
|
|
from django.db import models
|
|
from django.utils.encoding import smart_text
|
|
|
|
|
|
class DictField(models.TextField):
|
|
"""
|
|
A very simple field to store JSON in db.
|
|
"""
|
|
|
|
def get_prep_value(self, value):
|
|
if not value:
|
|
value = {}
|
|
if not isinstance(value, six.string_types):
|
|
value = json.dumps(value)
|
|
return value
|
|
|
|
def from_db_value(self, value, expression, connection, context):
|
|
return self.to_python(value)
|
|
|
|
def to_python(self, value):
|
|
if not value:
|
|
value = {}
|
|
if isinstance(value, six.string_types):
|
|
return json.loads(value)
|
|
else:
|
|
return value
|
|
|
|
def value_to_string(self, obj):
|
|
"""Return value from object converted to string properly"""
|
|
return smart_text(self.get_prep_value(self.value_from_object(obj)))
|