100 lines
3.3 KiB
Python
100 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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import time
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import datetime
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import copy
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from django.db import models
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from django.utils import datetime_safe
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from six import string_types
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from ox.utils import json
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def to_json(python_object):
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if isinstance(python_object, datetime.datetime):
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if python_object.year < 1900:
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tt = python_object.timetuple()
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value = '%d-%02d-%02dT%02d:%02d%02dZ' % tuple(list(tt)[:6])
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else:
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value = python_object.strftime('%Y-%m-%dT%H:%M:%SZ')
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return {'__class__': 'datetime.datetime',
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'__value__': value}
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if isinstance(python_object, datetime_safe.datetime):
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return {'__class__': 'datetime.datetime',
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'__value__': python_object.strftime('%Y-%m-%dT%H:%M:%SZ')}
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if isinstance(python_object, time.struct_time):
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return {'__class__': 'time.asctime',
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'__value__': time.asctime(python_object)}
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try:
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if isinstance(python_object, bytes):
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return {'__class__': 'bytes',
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'__value__': list(python_object)}
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except:
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pass
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raise TypeError(repr(python_object) + ' is not JSON serializable')
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def from_json(json_object):
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if '__class__' in json_object:
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if json_object['__class__'] == 'bytes':
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return bytes(json_object['__value__'])
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if json_object['__class__'] == 'datetime_safe.datetime' \
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or json_object['__class__'] == 'datetime.datetime':
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return datetime_safe.datetime.strptime(json_object['__value__'], '%Y-%m-%dT%H:%M:%SZ')
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if json_object['__class__'] == 'time.asctime':
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return time.strptime(json_object['__value__'])
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return json_object
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class DictField(models.TextField):
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_type = dict
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def loads(self, value):
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return json.loads(value, object_hook=from_json)
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def dumps(self, obj):
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return json.dumps(obj, default=to_json, ensure_ascii=False)
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def from_db_value(self, value, expression, connection, context):
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if value is None:
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return value
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if isinstance(value, self._type):
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return value
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try:
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value = self.loads(value)
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except:
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raise Exception('failed to parse value: %s' % value)
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if value is not None:
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assert isinstance(value, self._type)
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return value
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def get_prep_value(self, value):
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if isinstance(value, self._type):
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value = self.dumps(value)
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if value is not None:
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assert isinstance(value, string_types)
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value = models.TextField.get_prep_value(self, value)
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return value
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def get_default(self):
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if self.has_default():
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if callable(self.default):
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return self.default()
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return copy.deepcopy(self.default)
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return super(DictField, self).get_default()
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class TupleField(DictField):
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_type = (tuple, list)
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def loads(self, value):
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value = DictField.loads(self, value)
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if isinstance(value, list):
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value = tuple(value)
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return value
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try:
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from south.modelsinspector import add_introspection_rules
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add_introspection_rules([], ["^oxdjango\.fields\.DictField"])
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add_introspection_rules([], ["^oxdjango\.fields\.TupleField"])
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except:
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pass
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