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如何在无需通过会议的情况下使用[SqlAlchemy]
原标题:how to use session without having to pass it [SqlAlchemy]

我想检查一下非行的贬低价值,并创造新的价值,因此,需要问一下,一看一看一看是否必须用我的“结构”类会议,或我必须怎样做? 利用像全球这样的会议? i 文件中没有发现。

与此类似:

class MyClass(Base):

    __tablename__ =  my_class 
    __table_args__ = (UniqueConstraint( key ,  key2 ),
                     {}
                     )
    id =  Column(Integer, Sequence( my_class_id ), primary_key=True)
    key = Column(String(30), nullable= False) #unique together key2
    key2 = Column(String(30), nullable = False) 
    value = Column(Integer, nullable=False)

    def __init__(self, key, key2):
        #check if exist key and key2
        values = session.query(MyClass.value).filter(MyClass.key == self.key).
            filter(MyClass.key2 == self)

        if values:
            raise IntegrityError

        #get biggest value
        value = session.query(MyClass.value).filter(MyClass.key = self.key).order_by(asc(MyClass.value)) #I m not shure if i need  asc 
        #no value new key and key2

        if not value:
            self.key = key
            self.key2 = key2
            self.value =  000 
            return

        #i used a single table beacuse is easier to understand
        #in this example
        self.key = key
        self.key2 = key
        self.value = increment(value.first())

I m 采用LQchemy 6.2和声明

增 编

最佳回答

你们必须做自己的会议管理——例如确定一个单元——全球会议的目标。

例如,Pylons的申请对本届会议的定义如下:

from sqlalchemy.orm import scoped_session, sessionmaker
Session = scoped_session(sessionmaker())

之后又将其与一个发动机连接起来。

Session.configure(bind=engine)

使用范围——会意味着你的法典是校对安全(每个校对将使用自己的会议)。

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