base.py 文件源码

def adapt_datetime_warn_on_aware_datetime(value, conv):
    # Remove this function and rely on the default adapter in Django 2.0.
    if settings.USE_TZ and timezone.is_aware(value):
        warnings.warn(
            "The MySQL database adapter received an aware datetime (%s), "
            "probably from cursor.execute(). Update your code to pass a "
            "naive datetime in the database connection's time zone (UTC by "
            "default).", RemovedInDjango20Warning)
        # This doesn't account for the database connection's timezone,
        # which isn't known. (That's why this adapter is deprecated.)
        value = value.astimezone(timezone.utc).replace(tzinfo=None)
    return Thing2Literal(value.strftime("%Y-%m-%d %H:%M:%S.%f"), conv)


# MySQLdb returns TIME columns as timedelta -- they are more like timedelta in
# terms of actual behavior as they are signed and include days -- and Django
# expects time, so we still need to override that. We also need to add special
# handling for SafeText and SafeBytes as MySQLdb's type checking is too tight
# to catch those (see Django ticket #6052).