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 | from datetime import datetime
from django.core.management.commands.makemigrations import Command
from django.db import models
original_deconstruct = models.Field.deconstruct
def new_deconstruct(self):
    """
    virtualtime can induce bad signature for "now" function replace it
    explicitly
    """
    name, path, args, kwargs = original_deconstruct(self)
    if 'default' in kwargs and callable(kwargs['default']) and \
            kwargs['default'].__name__ == 'now':
        kwargs['default'] = datetime.now
    return name, path, args, kwargs
models.Field.deconstruct = new_deconstruct
 |