def mock_field_default(field):
from django.db import DefaultConnectionProxy
if field.has_default():
if callable(field.default):
if field.default.__name__ == 'now':
return datetime.datetime.now()
return field.default()
return field.default
if not field.empty_strings_allowed or \
(field.null and not DefaultConnectionProxy().features.interprets_empty_strings_as_nulls):
return None
return ''
from django.db import models
from django.utils.translation import gettext_lazy as _
import ethereum.utils
from hexbytes import HexBytes
from .validators import validate_checksumed_address
try:
from django.db import DefaultConnectionProxy
connection = DefaultConnectionProxy()
except ImportError:
from django.db import connections
connection = connections['default']
class EthereumAddressField(models.CharField):
default_validators = [validate_checksumed_address]
description = "Ethereum address"
def __init__(self, *args, **kwargs):
kwargs['max_length'] = 42
super().__init__(*args, **kwargs)
def deconstruct(self):
name, path, args, kwargs = super().deconstruct()
del kwargs['max_length']
return name, path, args, kwargs
def from_db_value(self, value, expression, connection):
return self.to_python(value)