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annotate roundup/backends/back_mysql.py @ 1678:2af054eafa24

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actually check in the cosmetic fix
author Richard Jones <richard@users.sourceforge.net>
date Tue, 24 Jun 2003 00:11:57 +0000
parents b953750bdc04
children 94e430ad4fdb 84b6d5b07626
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1 #
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2 # Copyright (c) 2003 Martynas Sklyzmantas, Andrey Lebedev <andrey@micro.lt>
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3 #
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4 # This module is free software, and you may redistribute it and/or modify
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5 # under the same terms as Python, so long as this copyright message and
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6 # disclaimer are retained in their original form.
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7 #
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8 # Mysql backend for roundup
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9 #
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11 from roundup.backends.rdbms_common import *
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12 from roundup.backends import rdbms_common
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13 import MySQLdb
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14 import os, shutil
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15 from MySQLdb.constants import ER
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16
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17 class Maintenance:
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18 """ Database maintenance functions """
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19 def db_nuke(self, config):
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20 """Clear all database contents and drop database itself"""
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21 db = Database(config, 'admin')
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22 db.sql("DROP DATABASE %s" % config.MYSQL_DBNAME)
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23 db.sql("CREATE DATABASE %s" % config.MYSQL_DBNAME)
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24 if os.path.exists(config.DATABASE):
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25 shutil.rmtree(config.DATABASE)
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26
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27 def db_exists(self, config):
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28 """Check if database already exists"""
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29 # Yes, this is a hack, but we must must open connection without
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30 # selecting a database to prevent creation of some tables
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31 config.MYSQL_DATABASE = (config.MYSQL_DBHOST, config.MYSQL_DBUSER, config.MYSQL_DBPASSWORD)
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32 db = Database(config, 'admin')
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33 db.conn.select_db(config.MYSQL_DBNAME)
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34 config.MYSQL_DATABASE = (config.MYSQL_DBHOST, config.MYSQL_DBUSER, config.MYSQL_DBPASSWORD, config.MYSQL_DBNAME)
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35 db.sql("SHOW TABLES")
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36 tables = db.sql_fetchall()
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37 if tables or os.path.exists(config.DATABASE):
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38 return 1
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39 return 0
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40
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41 class Database(Database):
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42 arg = '%s'
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43
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44 def open_connection(self):
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45 db = getattr(self.config, 'MYSQL_DATABASE')
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46 try:
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47 self.conn = MySQLdb.connect(*db)
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48 except MySQLdb.OperationalError, message:
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49 raise DatabaseError, message
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50
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51 self.cursor = self.conn.cursor()
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52 # start transaction
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53 self.sql("SET AUTOCOMMIT=0")
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54 self.sql("BEGIN")
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55 try:
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56 self.database_schema = self.load_dbschema()
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57 except MySQLdb.OperationalError, message:
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58 if message[0] != ER.NO_DB_ERROR:
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59 raise
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60 except MySQLdb.ProgrammingError, message:
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61 if message[0] != ER.NO_SUCH_TABLE:
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62 raise DatabaseError, message
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63 self.database_schema = {}
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64 self.sql("CREATE TABLE schema (schema TEXT) TYPE=BDB")
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65 self.sql("CREATE TABLE ids (name varchar(255), num INT) TYPE=BDB")
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66
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67 def close(self):
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68 try:
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69 self.conn.close()
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70 except MySQLdb.OperationalError, message:
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71 raise
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72
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73 def __repr__(self):
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74 return '<myroundsql 0x%x>'%id(self)
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76 def sql_fetchone(self):
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77 return self.cursor.fetchone()
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78
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79 def sql_fetchall(self):
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80 return self.cursor.fetchall()
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81
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82 def save_dbschema(self, schema):
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83 s = repr(self.database_schema)
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84 self.sql('INSERT INTO schema VALUES (%s)', (s,))
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85
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86 def load_dbschema(self):
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87 self.cursor.execute('SELECT schema FROM schema')
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88 schema = self.cursor.fetchone()
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89 if schema:
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90 return eval(schema[0])
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91 return None
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92
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93 def save_journal(self, classname, cols, nodeid, journaldate,
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94 journaltag, action, params):
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95 params = repr(params)
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96 entry = (nodeid, journaldate, journaltag, action, params)
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97
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98 a = self.arg
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99 sql = 'insert into %s__journal (%s) values (%s,%s,%s,%s,%s)'%(classname,
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100 cols, a, a, a, a, a)
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101 if __debug__:
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102 print >>hyperdb.DEBUG, 'addjournal', (self, sql, entry)
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103 self.cursor.execute(sql, entry)
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104
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105 def load_journal(self, classname, cols, nodeid):
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106 sql = 'select %s from %s__journal where nodeid=%s'%(cols, classname,
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107 self.arg)
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108 if __debug__:
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109 print >>hyperdb.DEBUG, 'getjournal', (self, sql, nodeid)
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110 self.cursor.execute(sql, (nodeid,))
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111 res = []
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112 for nodeid, date_stamp, user, action, params in self.cursor.fetchall():
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113 params = eval(params)
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114 res.append((nodeid, date.Date(date_stamp), user, action, params))
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115 return res
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116
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117 def create_class_table(self, spec):
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118 cols, mls = self.determine_columns(spec.properties.items())
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119 cols.append('id')
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120 cols.append('__retired__')
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121 scols = ',' . join(['`%s` VARCHAR(255)'%x for x in cols])
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122 sql = 'CREATE TABLE `_%s` (%s) TYPE=BDB'%(spec.classname, scols)
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123 if __debug__:
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124 print >>hyperdb.DEBUG, 'create_class', (self, sql)
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125 self.cursor.execute(sql)
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126 return cols, mls
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127
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128 def create_journal_table(self, spec):
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129 cols = ',' . join(['`%s` VARCHAR(255)'%x
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130 for x in 'nodeid date tag action params' . split()])
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131 sql = 'CREATE TABLE `%s__journal` (%s) TYPE=BDB'%(spec.classname, cols)
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132 if __debug__:
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133 print >>hyperdb.DEBUG, 'create_class', (self, sql)
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134 self.cursor.execute(sql)
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135
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136 def create_multilink_table(self, spec, ml):
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137 sql = '''CREATE TABLE `%s_%s` (linkid VARCHAR(255),
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138 nodeid VARCHAR(255)) TYPE=BDB'''%(spec.classname, ml)
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139 if __debug__:
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140 print >>hyperdb.DEBUG, 'create_class', (self, sql)
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141 self.cursor.execute(sql)
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142
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143 # Static methods
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144 nuke = Maintenance().db_nuke
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145 exists = Maintenance().db_exists
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146
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147 class MysqlClass:
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148 def find(self, **propspec):
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149 '''Get the ids of nodes in this class which link to the given nodes.
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150
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151 Since MySQL < 4.0.0 does not support unions, so we overrideg this
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152 method without using this keyword
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153
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154 '''
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155 if __debug__:
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156 print >>hyperdb.DEBUG, 'find', (self, propspec)
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157
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158 # shortcut
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159 if not propspec:
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160 return []
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161
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162 # validate the args
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163 props = self.getprops()
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164 propspec = propspec.items()
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165 for propname, nodeids in propspec:
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166 # check the prop is OK
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167 prop = props[propname]
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168 if not isinstance(prop, Link) and not isinstance(prop, Multilink):
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169 raise TypeError, "'%s' not a Link/Multilink property"%propname
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170
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171 # first, links
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172 l = []
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173 where = []
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174 allvalues = ()
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175 a = self.db.arg
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176 for prop, values in propspec:
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177 if not isinstance(props[prop], hyperdb.Link):
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178 continue
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179 if type(values) is type(''):
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180 allvalues += (values,)
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181 where.append('_%s = %s'%(prop, a))
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182 else:
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183 allvalues += tuple(values.keys())
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184 where.append('_%s in (%s)'%(prop, ','.join([a]*len(values))))
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185 tables = []
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186 if where:
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187 self.db.sql('select id as nodeid from _%s where %s' % (self.classname, ' and '.join(where)), allvalues)
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188 l += [x[0] for x in self.db.sql_fetchall()]
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189
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190 # now multilinks
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191 for prop, values in propspec:
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192 vals = ()
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193 if not isinstance(props[prop], hyperdb.Multilink):
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194 continue
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195 if type(values) is type(''):
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196 vals = (values,)
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197 s = a
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198 else:
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199 vals = tuple(values.keys())
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200 s = ','.join([a]*len(values))
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201 query = 'select nodeid from %s_%s where linkid in (%s)'%(
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202 self.classname, prop, s)
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203 self.db.sql(query, vals)
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204 l += [x[0] for x in self.db.sql_fetchall()]
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205 if __debug__:
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206 print >>hyperdb.DEBUG, 'find ... ', l
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207
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208 # Remove duplicated ids
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209 d = {}
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210 for k in l:
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211 d[k] = 1
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212 return d.keys()
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213
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214 return l
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215
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216 class Class(MysqlClass, rdbms_common.Class):
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217 pass
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218 class IssueClass(MysqlClass, rdbms_common.IssueClass):
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219 pass
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220 class FileClass(MysqlClass, rdbms_common.FileClass):
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221 pass
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222
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223 #vim: set et
Roundup Issue Tracker: http://roundup-tracker.org/