Python 3.x SQLAlchemy按日期和时间与时区组合筛选
更新Python 3.x SQLAlchemy按日期和时间与时区组合筛选,python-3.x,datetime,filter,sqlalchemy,timezone,Python 3.x,Datetime,Filter,Sqlalchemy,Timezone,更新 @datetime_as_timestamp.expression def datetime_as_timestamp(cls): return db.func.timestamp(cls.date, cls.time) @datetime_as_timestamp.expression def datetime_as_timestamp(cls): return db.func.timestamp(cls.date, cls.time) 到 原创 我的模型中有日期和时
@datetime_as_timestamp.expression
def datetime_as_timestamp(cls):
return db.func.timestamp(cls.date, cls.time)
@datetime_as_timestamp.expression
def datetime_as_timestamp(cls):
return db.func.timestamp(cls.date, cls.time)
到
原创
我的模型中有日期和时间。在另一个表中有它们的时区,但为了简单起见,这里我将手动执行。我想按日期+时间+时区过滤
class Foo(db.Model):
id = db.Column(db.Integer, primary_key=True)
date = db.Column(db.Date)
time = db.Column(db.Time)
@hybrid_property
def datetime_as_timestamp(self):
return time.mktime(
datetime.datetime.combine(self.date, self.time).timetuple()
)
@datetime_as_timestamp.expression
def datetime_as_timestamp(cls):
return db.func.timestamp(cls.date, cls.time)
但当我执行过滤查询时
In [1]: Foo.query.filter(func.timezone('Australia/Brisbane', Foo.datetime_as_timestamp) <= func.timezone('UTC', func.current_timestamp())).one()
[1]中的:Foo.query.filter(func.timezone('Australia/Brisbane',Foo.datetime\u as\u timestamp)我发现这非常有用。我改变了
到
一切正常
psycopg2.ProgrammingError) syntax error at or near "foo"
LINE 3: WHERE timezone('Australia/Brisbane', timestamp(foo.da...
^
[SQL: 'SELECT foo.id AS checkin_flight_id, foo.date AS checkin_flight_date, foo.time AS checkin_flight_time \nFROM foo \nWHERE timezone(%(timezone_1)s, timestamp(foo.date, foo.time)) <= timezone(%(timezone_2)s, CURRENT_TIMESTAMP)'] [parameters: {'timezone_2': 'UTC', 'timezone_1': 'Australia/Brisbane'}]
@datetime_as_timestamp.expression
def datetime_as_timestamp(cls):
return db.func.timestamp(cls.date, cls.time)
@datetime_as_timestamp.expression
def datetime_as_timestamp(cls):
return cls.date + cls.time