Mercurial > hg > Feedworm

annotate Mapping.py @ 39:0c2578196643

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Disable the article menu by default, enable it when the first article is selected
author Dirk Olmes <dirk@xanthippe.ping.de>
date Fri, 14 May 2010 06:48:48 +0200
parents aaec263f07ca
children 12ed8b5fa08c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
1
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
2 from Feed import Feed
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
3 from FeedEntry import FeedEntry
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
4 from sqlalchemy import Column
5
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
5 from sqlalchemy import DateTime
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
6 from sqlalchemy import ForeignKey
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
7 from sqlalchemy import Integer
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
8 from sqlalchemy import MetaData
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
9 from sqlalchemy import String
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
10 from sqlalchemy import Table
30
ee1432a91141 map the potentially long columns as Text (CLOB) not as String (VARCHAR)
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 29
diff changeset
11 from sqlalchemy import Text
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
12 from sqlalchemy.orm import mapper
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
13 from sqlalchemy.orm import relation
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
14
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
15 mappingDefined = False
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
16
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
17 def createMapping(engine):
34
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
18 """ Make sure the mapping is defined only once. This is not really needed for the feed updater
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
19 or the GUI app but comes in handy when working interactively with the system. """
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
20 global mappingDefined
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
21 if not mappingDefined:
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
22 _createMapping(engine)
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
23 mappingDefined = True
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
24
5813e3c10f14 move the database logic out into its own module. Make everything reload safe so that multiple sessions can be created from interactive sessions
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 30
diff changeset
25 def _createMapping(engine):
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
26 metadata = MetaData(engine)
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
27
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
28 feedTable = Table("feed", metadata,
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
29 Column("pk", Integer, primary_key=True),
7
215c34f61e95 Feed.url -> Feed.rss_url
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 6
diff changeset
30 Column("title", String(255), nullable=False),
35
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
31 Column("rss_url", String(255), nullable=False),
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
32 Column("update_interval", Integer, nullable=False),
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
33 Column("next_update", DateTime, nullable=False)
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
34 )
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
35
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
36 feedEntryTable = Table("feed_entry", metadata,
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
37 Column("pk", Integer, primary_key=True),
6
87317ba41816 add a creation date for the feed entry
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 5
diff changeset
38 Column("create_timestamp", DateTime, nullable=False),
29
74481aa49974 add a read flag for feed entries so they can be marked read
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 7
diff changeset
39 Column("read", Integer, nullable=False),
6
87317ba41816 add a creation date for the feed entry
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 5
diff changeset
40
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
41 Column("id", String(255), nullable=False),
5
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
42 Column("link", String(255), nullable=False),
30
ee1432a91141 map the potentially long columns as Text (CLOB) not as String (VARCHAR)
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 29
diff changeset
43 Column("title", Text, nullable=False),
ee1432a91141 map the potentially long columns as Text (CLOB) not as String (VARCHAR)
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 29
diff changeset
44 Column("summary", Text, nullable=False),
5
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
45 Column("updated", DateTime),
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
46 Column("feed_id", Integer, ForeignKey("feed.pk"))
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
47 )
2
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
48
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
49 metadata.create_all()
8a624ee48a74 First skeleton for sqlalchemy: define the mapping and create the first feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
50
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
51 mapper(FeedEntry, feedEntryTable)
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
52 mapper(Feed, feedTable,
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
53 properties = {
35
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
54 "entries" : relation(FeedEntry, backref="feed")
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
55 }
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 2
diff changeset
56 )