1 import datetime 2 3 import pytz 4 from django.apps import AppConfig 5 from django.db.models.fields import DateTimeField 6 from django.utils.dateparse import parse_date 7 from django.core.exceptions import ValidationError 8 9 default_app_config = 'patch.PatchConfig' 10 11 12 def patch(): 13 def get_db_prep_value(self, value, connection, prepared=False): 14 if isinstance(value, str): 15 if not value: 16 value = None 17 elif not parse_date(value): 18 try: 19 value = datetime.datetime.fromtimestamp(int(value)).replace(tzinfo=pytz.UTC) 20 except: 21 raise ValidationError( 22 self.error_messages['invalid'], 23 code='invalid', 24 params={'value': value}, 25 ) 26 if not prepared: 27 value = self.get_prep_value(value) 28 return connection.ops.adapt_datetimefield_value(value) 29 30 DateTimeField.get_db_prep_value = get_db_prep_value 31 32 33 class PatchConfig(AppConfig): 34 name = 'patch' 35 36 def ready(self): 37 patch()
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