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annotate Mapping.py @ 4:e0199f383442

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retrieve a feed for the given URL, store entries as feed_entry rows into the database
author Dirk Olmes <dirk@xanthippe.ping.de>
date Mon, 26 Apr 2010 19:33:07 +0200
parents 8a624ee48a74
children bfd47f55d85b
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8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
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2 from Feed import Feed
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e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
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3 from FeedEntry import FeedEntry
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4 from sqlalchemy import Column
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5 from sqlalchemy import ForeignKey
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6 from sqlalchemy import Integer
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7 from sqlalchemy import MetaData
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8 from sqlalchemy import String
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9 from sqlalchemy import Table
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10 from sqlalchemy.orm import mapper
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11 from sqlalchemy.orm import relation
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13 def createMapping(engine):
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14 metadata = MetaData(engine)
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16 feedTable = Table("feed", metadata,
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17 Column("pk", Integer, primary_key=True),
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18 Column("name", String(255), nullable=False),
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19 Column("url", String(255), nullable=False)
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e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
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22 feedEntryTable = Table("feed_entry", metadata,
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23 Column("pk", Integer, primary_key=True),
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24 Column("id", String(255), nullable=False),
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25 Column("url", String(255), nullable=False),
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26 Column("title", String, nullable=False),
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27 Column("summary", String, nullable=False),
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28 Column("feed_id", Integer, ForeignKey("feed.pk"))
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29 )
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31 metadata.create_all()
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33 mapper(FeedEntry, feedEntryTable)
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34 mapper(Feed, feedTable,
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35 properties = {
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36 "entries" : relation(FeedEntry, backref = "feed")
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37 }
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38 )