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Make drop_tables generic for mysql so we dont end up with a function that has 20 if(dbversion ==) statements within

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This commit is contained in:
Worros 2008-10-08 01:41:06 +08:00
parent 3018cc660b
commit 3d43e8167c
1 changed files with 34 additions and 46 deletions
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80
pyfpdb/fpdb_db.py
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@ -16,6 +16,7 @@
#agpl-3.0.txt in the docs folder of the package.
import os
import re
import fpdb_simple
import FpdbSQLQueries
@ -110,53 +111,40 @@ class fpdb_db:
def drop_tables(self):
"""Drops the fpdb tables from the current db"""
oldDbVersion=0
try:
self.cursor.execute("SELECT * FROM settings") #for alpha1
oldDbVersion=self.cursor.fetchone()[0]
except:# _mysql_exceptions.ProgrammingError:
pass
try:
self.cursor.execute("SELECT * FROM Settings")
oldDbVersion=self.cursor.fetchone()[0]
except:# _mysql_exceptions.ProgrammingError:
pass
if oldDbVersion<=34:
self.cursor.execute("DROP TABLE IF EXISTS settings;")
self.cursor.execute("DROP TABLE IF EXISTS HudDataHoldemOmaha;")
self.cursor.execute("DROP TABLE IF EXISTS autorates;")
self.cursor.execute("DROP TABLE IF EXISTS board_cards;")
self.cursor.execute("DROP TABLE IF EXISTS hands_actions;")
self.cursor.execute("DROP TABLE IF EXISTS hands_players;")
self.cursor.execute("DROP TABLE IF EXISTS hands;")
self.cursor.execute("DROP TABLE IF EXISTS tourneys_players;")
self.cursor.execute("DROP TABLE IF EXISTS tourneys;")
self.cursor.execute("DROP TABLE IF EXISTS players;")
self.cursor.execute("DROP TABLE IF EXISTS gametypes;")
self.cursor.execute("DROP TABLE IF EXISTS sites;")
if oldDbVersion>34 and oldDbVersion<=45:
self.cursor.execute("DROP TABLE IF EXISTS HudDataHoldemOmaha;")
self.cursor.execute("DROP TABLE IF EXISTS Settings;")
self.cursor.execute("DROP TABLE IF EXISTS HudCache;")
self.cursor.execute("DROP TABLE IF EXISTS Autorates;")
self.cursor.execute("DROP TABLE IF EXISTS BoardCards;")
self.cursor.execute("DROP TABLE IF EXISTS HandsActions;")
self.cursor.execute("DROP TABLE IF EXISTS HandsPlayers;")
self.cursor.execute("DROP TABLE IF EXISTS Hands;")
self.cursor.execute("DROP TABLE IF EXISTS TourneysPlayers;")
self.cursor.execute("DROP TABLE IF EXISTS Tourneys;")
self.cursor.execute("DROP TABLE IF EXISTS Players;")
self.cursor.execute("DROP TABLE IF EXISTS Gametypes;")
if oldDbVersion>45 and oldDbVersion<=51:
self.cursor.execute("DROP TABLE IF EXISTS TourneysGametypes;")
self.cursor.execute("DROP TABLE IF EXISTS TourneyTypes;")
self.cursor.execute("DROP TABLE IF EXISTS Sites;")
self.db.commit()
if(self.get_backend_name() == 'MySQL InnoDB'):
# Query the DB to see what tables exist
self.cursor.execute('SHOW TABLES')
#Databases with FOREIGN KEY support need this switched of before you can drop tables
self.drop_referencial_integrity()
for table in self.cursor:
self.cursor.execute(self.sql.query['drop_table'] + table[0])
elif(self.get_backend_name() == 'PostgreSQL'):
#todo: postgres version here
elif(self.get_backend_name() == 'SQLite'):
#todo: sqlite version here
#end def drop_tables
def drop_referencial_integrity(self):
"""Update all tables to remove foreign keys"""
self.cursor.execute('SHOW TABLES') # todo: move to FpdbSQLQueries
result = self.cursor.fetchall()
for i in range(len(result)):
self.cursor.execute("SHOW CREATE TABLE " + result[i][0])
inner = self.cursor.fetchall()
for j in range(len(inner)):
# result[i][0] - Table name
# result[i][1] - CREATE TABLE parameters
#Searching for CONSTRAINT `tablename_ibfk_1`
for m in re.finditer('(ibfk_[0-9]+)', inner[j][1]):
key = "`" + inner[j][0] + "_" + m.group() + "`"
self.cursor.execute("ALTER TABLE " + inner[j][0] + " DROP FOREIGN KEY " + key)
self.db.commit()
#end drop_referencial_inegrity
def get_backend_name(self):
"""Returns the name of the currently used backend"""