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annotate roundup/backends/back_sqlite.py @ 2133:f01befe8a7fe

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*** empty log message ***
author Richard Jones <richard@users.sourceforge.net>
date Fri, 26 Mar 2004 01:19:25 +0000
parents 18addf2a8596
children c49495585c44
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1 # $Id: back_sqlite.py,v 1.20 2004-03-22 07:45:39 richard Exp $
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2 '''Implements a backend for SQLite.
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3
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4 See https://pysqlite.sourceforge.net/ for pysqlite info
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5
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6
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7 NOTE: we use the rdbms_common table creation methods which define datatypes
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8 for the columns, but sqlite IGNORES these specifications.
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9 '''
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10 __docformat__ = 'restructuredtext'
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11
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12 import os, base64, marshal
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13
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14 from roundup import hyperdb, date, password
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15 from roundup.backends import rdbms_common
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16 import sqlite
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17
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18 class Database(rdbms_common.Database):
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19 # char to use for positional arguments
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20 arg = '%s'
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21
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22 hyperdb_to_sql_value = {
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23 hyperdb.String : str,
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24 hyperdb.Date : lambda x: x.serialise(),
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25 hyperdb.Link : int,
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26 hyperdb.Interval : lambda x: x.serialise(),
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27 hyperdb.Password : str,
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28 hyperdb.Boolean : int,
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29 hyperdb.Number : lambda x: x,
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30 }
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31 sql_to_hyperdb_value = {
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32 hyperdb.String : str,
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33 hyperdb.Date : lambda x: date.Date(str(x)),
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34 # hyperdb.Link : int, # XXX numeric ids
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35 hyperdb.Link : str,
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36 hyperdb.Interval : date.Interval,
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37 hyperdb.Password : lambda x: password.Password(encrypted=x),
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38 hyperdb.Boolean : int,
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39 hyperdb.Number : rdbms_common._num_cvt,
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40 }
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41
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42 def sql_open_connection(self):
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43 db = os.path.join(self.config.DATABASE, 'db')
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44 conn = sqlite.connect(db=db)
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45 cursor = conn.cursor()
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46 return (conn, cursor)
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47
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48 def open_connection(self):
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49 # ensure files are group readable and writable
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50 os.umask(0002)
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52 (self.conn, self.cursor) = self.sql_open_connection()
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53
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54 try:
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55 self.load_dbschema()
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56 except sqlite.DatabaseError, error:
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57 if str(error) != 'no such table: schema':
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58 raise
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59 self.init_dbschema()
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60 self.cursor.execute('create table schema (schema varchar)')
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61 self.cursor.execute('create table ids (name varchar, num integer)')
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62 self.cursor.execute('create index ids_name_idx on ids(name)')
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63 self.create_version_2_tables()
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64
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65 def create_version_2_tables(self):
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66 self.cursor.execute('create table otks (otk_key varchar, '
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67 'otk_value varchar, otk_time integer)')
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68 self.cursor.execute('create index otks_key_idx on otks(otk_key)')
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69 self.cursor.execute('create table sessions (session_key varchar, '
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70 'session_time integer, session_value varchar)')
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71 self.cursor.execute('create index sessions_key_idx on '
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72 'sessions(session_key)')
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73
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74 # full-text indexing store
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75 self.cursor.execute('CREATE TABLE __textids (_class varchar, '
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76 '_itemid varchar, _prop varchar, _textid integer primary key) ')
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77 self.cursor.execute('CREATE TABLE __words (_word varchar, '
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78 '_textid integer)')
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79 self.cursor.execute('CREATE INDEX words_word_ids ON __words(_word)')
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80 sql = 'insert into ids (name, num) values (%s,%s)'%(self.arg, self.arg)
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81 self.cursor.execute(sql, ('__textids', 1))
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82
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83 def add_actor_column(self):
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84 # update existing tables to have the new actor column
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85 tables = self.database_schema['tables']
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86 for classname, spec in self.classes.items():
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87 if tables.has_key(classname):
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88 dbspec = tables[classname]
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89 self.update_class(spec, dbspec, force=1, adding_actor=1)
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90
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91 def update_class(self, spec, old_spec, force=0, adding_actor=0):
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92 ''' Determine the differences between the current spec and the
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93 database version of the spec, and update where necessary.
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94
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95 If 'force' is true, update the database anyway.
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96
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97 SQLite doesn't have ALTER TABLE, so we have to copy and
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98 regenerate the tables with the new schema.
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99 '''
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100 new_has = spec.properties.has_key
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101 new_spec = spec.schema()
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102 new_spec[1].sort()
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103 old_spec[1].sort()
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104 if not force and new_spec == old_spec:
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105 # no changes
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106 return 0
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107
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108 if __debug__:
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109 print >>hyperdb.DEBUG, 'update_class FIRING'
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110
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111 # detect multilinks that have been removed, and drop their table
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112 old_has = {}
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113 for name,prop in old_spec[1]:
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114 old_has[name] = 1
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115 if new_has(name) or not isinstance(prop, hyperdb.Multilink):
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116 continue
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117 # it's a multilink, and it's been removed - drop the old
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118 # table. First drop indexes.
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119 self.drop_multilink_table_indexes(spec.classname, ml)
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120 sql = 'drop table %s_%s'%(spec.classname, prop)
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121 if __debug__:
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122 print >>hyperdb.DEBUG, 'update_class', (self, sql)
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123 self.cursor.execute(sql)
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124 old_has = old_has.has_key
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125
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126 # now figure how we populate the new table
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127 if adding_actor:
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128 fetch = ['_activity', '_creation', '_creator']
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129 else:
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130 fetch = ['_actor', '_activity', '_creation', '_creator']
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131 properties = spec.getprops()
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132 for propname,x in new_spec[1]:
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133 prop = properties[propname]
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134 if isinstance(prop, hyperdb.Multilink):
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135 if force or not old_has(propname):
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diff changeset
136 # we need to create the new table
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137 self.create_multilink_table(spec, propname)
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diff changeset
138 elif old_has(propname):
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139 # we copy this col over from the old table
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diff changeset
140 fetch.append('_'+propname)
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141
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diff changeset
142 # select the data out of the old table
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143 fetch.append('id')
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144 fetch.append('__retired__')
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145 fetchcols = ','.join(fetch)
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146 cn = spec.classname
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147 sql = 'select %s from _%s'%(fetchcols, cn)
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148 if __debug__:
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149 print >>hyperdb.DEBUG, 'update_class', (self, sql)
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150 self.cursor.execute(sql)
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151 olddata = self.cursor.fetchall()
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152
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153 # TODO: update all the other index dropping code
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154 self.drop_class_table_indexes(cn, old_spec[0])
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155
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156 # drop the old table
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157 self.cursor.execute('drop table _%s'%cn)
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158
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159 # create the new table
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160 self.create_class_table(spec)
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161
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162 if olddata:
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163 # do the insert of the old data - the new columns will have
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164 # NULL values
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165 args = ','.join([self.arg for x in fetch])
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166 sql = 'insert into _%s (%s) values (%s)'%(cn, fetchcols, args)
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167 if __debug__:
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168 print >>hyperdb.DEBUG, 'update_class', (self, sql, olddata[0])
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169 for entry in olddata:
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170 self.cursor.execute(sql, tuple(entry))
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171
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172 return 1
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173
1911
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174 def sql_close(self):
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175 ''' Squash any error caused by us already having closed the
1236
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176 connection.
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177 '''
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178 try:
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179 self.conn.close()
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180 except sqlite.ProgrammingError, value:
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181 if str(value) != 'close failed - Connection is closed.':
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182 raise
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183
1911
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diff changeset
184 def sql_rollback(self):
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185 ''' Squash any error caused by us having closed the connection (and
1236
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186 therefore not having anything to roll back)
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187 '''
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188 try:
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189 self.conn.rollback()
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190 except sqlite.ProgrammingError, value:
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191 if str(value) != 'rollback failed - Connection is closed.':
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192 raise
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193
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194 def __repr__(self):
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195 return '<roundlite 0x%x>'%id(self)
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196
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197 def sql_commit(self):
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198 ''' Actually commit to the database.
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199
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200 Ignore errors if there's nothing to commit.
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201 '''
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202 try:
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203 self.conn.commit()
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204 except sqlite.DatabaseError, error:
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205 if str(error) != 'cannot commit - no transaction is active':
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206 raise
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207
1906
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diff changeset
208 def sql_index_exists(self, table_name, index_name):
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209 self.cursor.execute('pragma index_list(%s)'%table_name)
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210 for entry in self.cursor.fetchall():
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211 if entry[1] == index_name:
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212 return 1
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213 return 0
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214
2098
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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215 # old-skool id generation
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216 def newid(self, classname):
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217 ''' Generate a new id for the given class
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218 '''
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219 # get the next ID
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diff changeset
220 sql = 'select num from ids where name=%s'%self.arg
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diff changeset
221 if __debug__:
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diff changeset
222 print >>hyperdb.DEBUG, 'newid', (self, sql, classname)
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diff changeset
223 self.cursor.execute(sql, (classname, ))
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diff changeset
224 newid = int(self.cursor.fetchone()[0])
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diff changeset
225
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226 # update the counter
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diff changeset
227 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
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diff changeset
228 vals = (int(newid)+1, classname)
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diff changeset
229 if __debug__:
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diff changeset
230 print >>hyperdb.DEBUG, 'newid', (self, sql, vals)
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diff changeset
231 self.cursor.execute(sql, vals)
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232
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233 # return as string
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234 return str(newid)
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diff changeset
235
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
236 def setid(self, classname, setid):
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237 ''' Set the id counter: used during import of database
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diff changeset
238
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diff changeset
239 We add one to make it behave like the seqeunces in postgres.
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diff changeset
240 '''
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diff changeset
241 sql = 'update ids set num=%s where name=%s'%(self.arg, self.arg)
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diff changeset
242 vals = (int(setid)+1, classname)
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diff changeset
243 if __debug__:
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
244 print >>hyperdb.DEBUG, 'setid', (self, sql, vals)
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diff changeset
245 self.cursor.execute(sql, vals)
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diff changeset
246
18addf2a8596 Implemented proper datatypes in mysql and postgresql backends...
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diff changeset
247 def create_class(self, spec):
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diff changeset
248 rdbms_common.Database.create_class(self, spec)
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diff changeset
249 sql = 'insert into ids (name, num) values (%s, %s)'
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diff changeset
250 vals = (spec.classname, 1)
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diff changeset
251 if __debug__:
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diff changeset
252 print >>hyperdb.DEBUG, 'create_class', (self, sql, vals)
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diff changeset
253 self.cursor.execute(sql, vals)
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diff changeset
254
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
255 class sqliteClass:
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diff changeset
256 def filter(self, search_matches, filterspec, sort=(None,None),
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diff changeset
257 group=(None,None)):
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diff changeset
258 ''' If there's NO matches to a fetch, sqlite returns NULL
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
259 instead of nothing
1165
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diff changeset
260 '''
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
261 return filter(None, rdbms_common.Class.filter(self, search_matches,
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diff changeset
262 filterspec, sort=sort, group=group))
1165
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diff changeset
263
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
264 class Class(sqliteClass, rdbms_common.Class):
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diff changeset
265 pass
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diff changeset
266
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
267 class IssueClass(sqliteClass, rdbms_common.IssueClass):
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diff changeset
268 pass
1168
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diff changeset
269
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
270 class FileClass(sqliteClass, rdbms_common.FileClass):
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diff changeset
271 pass
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diff changeset
272
1911
f5c804379c85 fixed ZRoundup - mostly changes to classic template
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diff changeset
273
Roundup Issue Tracker: http://roundup-tracker.org/