Mercurial > hg > Feedworm

annotate Database.py @ 40:c858aab71e5b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
add preferences dialog
author Dirk Olmes <dirk@xanthippe.ping.de>
date Fri, 14 May 2010 07:05:02 +0200
parents 22214d79ed41
children 254d5b89a6ca
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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:
diff changeset
1
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:
diff changeset
2 import Mapping
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:
diff changeset
3 import sqlalchemy
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:
diff changeset
4 import sqlalchemy.orm
37
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
5 import sys
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:
diff changeset
6
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:
diff changeset
7 # Keep the connection to the database only once. The feed updater and the GUI app will
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:
diff changeset
8 # operate on a single engine/session but this comes in handy for interactive use
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:
diff changeset
9 engine = None
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:
diff changeset
10 SessionMaker = None
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:
diff changeset
11
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:
diff changeset
12 def createSession():
37
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
13 databaseUrl = _getDatabaseUrl()
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:
diff changeset
14 initEngine(databaseUrl)
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:
diff changeset
15 Mapping.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:
diff changeset
16 initSessionMaker()
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:
diff changeset
17 return SessionMaker()
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:
diff changeset
18
37
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
19 def _getDatabaseUrl():
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
20 if len(sys.argv) < 2:
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
21 print("Usage: %s <database url>" % (sys.argv[0]))
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
22 sys.exit(1)
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
23 return sys.argv[1]
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
24
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:
diff changeset
25 def initEngine(databaseUrl):
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:
diff changeset
26 global 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:
diff changeset
27 if engine is None:
37
22214d79ed41 database URL must be given as commandline argument now, no need for creating complicated config files. Add a menu entry for opening the selected article in browser.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 34
diff changeset
28 engine = sqlalchemy.create_engine(databaseUrl, echo=True)
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:
diff changeset
29
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:
diff changeset
30 def initSessionMaker():
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:
diff changeset
31 global SessionMaker
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:
diff changeset
32 if SessionMaker is None:
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:
diff changeset
33 SessionMaker = sqlalchemy.orm.sessionmaker(bind=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:
diff changeset
34