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我有這個表:如何使用多對多關係過濾兩個表中的列?
channel_items = Table(
"channel_items",
metadata,
Column("channel_id", Integer, ForeignKey("channels.id")),
Column("media_item_id", Integer, ForeignKey("media_items.id"))
)
class Channel(rdb.Model):
"""Set up channels table in the database"""
rdb.metadata(metadata)
rdb.tablename("channels")
id = Column("id", Integer, primary_key=True)
title = Column("title", String(100))
items = relationship("MediaItem", secondary=channel_items, order_by="MediaItem.titleView", backref="channels")
class MediaItem(rdb.Model):
"""Set up items table in the database"""
rdb.metadata(metadata)
rdb.tablename("media_items")
id = Column("id", Integer, primary_key=True)
title = Column("title", String(100))
type = Column("type", String(50))
我想進行查詢,但濾波第二表。喜歡的東西:
渠道= session.query(信道)可供選項(eagerload( 「項目」))過濾器(MediaItem == 「JPG」)所有()
在此先感謝!
明白了。謝謝! – bribon 2010-08-17 13:47:10