Source code for sqlalchemy_utils.types.weekdays

import six
from sqlalchemy import types

from .. import i18n
from ..exceptions import ImproperlyConfigured
from ..primitives import WeekDay, WeekDays
from .bit import BitType
from .scalar_coercible import ScalarCoercible


[docs]class WeekDaysType(types.TypeDecorator, ScalarCoercible): """ WeekDaysType offers way of saving WeekDays objects into database. The WeekDays objects are converted to bit strings on the way in and back to WeekDays objects on the way out. In order to use WeekDaysType you need to install Babel_ first. .. _Babel: http://babel.pocoo.org/ :: from sqlalchemy_utils import WeekDaysType, WeekDays from babel import Locale class Schedule(Base): __tablename__ = 'schedule' id = sa.Column(sa.Integer, autoincrement=True) working_days = sa.Column(WeekDaysType) schedule = Schedule() schedule.working_days = WeekDays('0001111') session.add(schedule) session.commit() print schedule.working_days # Thursday, Friday, Saturday, Sunday WeekDaysType also supports scalar coercion: :: schedule.working_days = '1110000' schedule.working_days # WeekDays object """ impl = BitType(WeekDay.NUM_WEEK_DAYS) def __init__(self, *args, **kwargs): if i18n.babel is None: raise ImproperlyConfigured( "'babel' package is required to use 'WeekDaysType'" ) super(WeekDaysType, self).__init__(*args, **kwargs) @property def comparator_factory(self): return self.impl.comparator_factory def process_bind_param(self, value, dialect): if isinstance(value, WeekDays): value = value.as_bit_string() if dialect.name == 'mysql': func = bytes if six.PY3 else bytearray return func(value, 'utf8') return value def process_result_value(self, value, dialect): if value is not None: return WeekDays(value) def _coerce(self, value): if value is not None and not isinstance(value, WeekDays): return WeekDays(value) return value