Question

编辑2：

class MethodCall(Base):
    __tablename__ = 'methodCall'
    id = Column(Integer, primary_key=True)
    name = Column(String( 255 ), unique = True)
    actions = relationship("Action")

def test_bulk_insert():
    ses = DBSession()
    mc = MethodCall()
    a1 = Action()
    a2 = Action()
    a1.lfn = getFile(ses, 'toto')
    a2.lfn = getFile(ses, 'toto')
    mc.actions.append(a1)
    mc.actions.append(a2)

编辑：现在我有两个关系表：

class Action(Base):
    __tablename__ = 'action'
    id = Column(Integer, primary_key=True)
    file_id = Column(Integer, ForeignKey('file.id'))
    lfn = relationship("File")
    methodCall_id = Column(Integer, ForeignKey('methodCall.id'))

class File(Base):
    __tablename__ = 'file'
    id = Column(Integer, primary_key=True)
    name = Column(String( 255 ), unique = True)

当我插入两个这样的动作时：

a1 = Action()
a2 = Action()
a1.lfn = getFile(ses, 'toto')
a2.lfn = getFile(ses, 'toto')
ses.bulk_save_objects([a1,a2])

def getFile(session,n):
    instance = session.query( File ).filter_by( name = n ).first()
    if not instance:
        instance = File( name=n )
        session.add( instance )
        session.commit()
    return instance

未设置表操作中的file_id，它为null。我该怎么办？

插入行时，SQLALchemy有点问题。

我有一个表格文件：

class File(Base): __tablename__ = 'file' id = Column(Integer, primary_key=True,autoincrement=True)

当我插入两个这样的文件时：
f1 = File( id = 1 )
f2 = File( id =2 )
session.add(f1)
session.add(f2)
session.commit()
它是一个批量插入：
2015-06-16 11:27:57,057 INFO sqlalchemy.engine.base.Engine BEGIN (implicit)
2015-06-16 11:27:57,058 INFO sqlalchemy.engine.base.Engine INSERT INTO file (id) VALUES (%s)
2015-06-16 11:27:57,058 INFO sqlalchemy.engine.base.Engine ((1,), (2,))
2015-06-16 11:27:57,060 INFO sqlalchemy.engine.base.Engine COMMIT
但是当我没有精确的id时，插入是一个接一个：
f1 = File(  )
f2 = File( )
session.add(f1)
session.add(f2)
session.commit()

2015-06-16 11:28:46,648 INFO sqlalchemy.engine.base.Engine INSERT INTO file () VALUES ()
2015-06-16 11:28:46,649 INFO sqlalchemy.engine.base.Engine ()
2015-06-16 11:28:46,654 INFO sqlalchemy.engine.base.Engine INSERT INTO file () VALUES ()
2015-06-16 11:28:46,654 INFO sqlalchemy.engine.base.Engine ()
2015-06-16 11:28:46,655 INFO sqlalchemy.engine.base.Engine COMMIT
当我没有精确的ID来批量插入时，有什么办法吗？   自动递增？

谢谢

SQLAlchemy批量插入自动增量

0 个答案: