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| 1 | +# -*- coding: utf-8 -*- |
| 2 | + |
| 3 | +""" |
| 4 | +/*************************************************************************** |
| 5 | +Name : QtSqlDB |
| 6 | +Description : DB API 2.0 interface for QtSql |
| 7 | +Date : June 6, 2015 |
| 8 | +Copyright : (C) 2015 by Jürgen E. Fischer |
| 9 | +email : jef at norbit dot de |
| 10 | +
|
| 11 | + ***************************************************************************/ |
| 12 | +
|
| 13 | +/*************************************************************************** |
| 14 | + * * |
| 15 | + * This program is free software; you can redistribute it and/or modify * |
| 16 | + * it under the terms of the GNU General Public License as published by * |
| 17 | + * the Free Software Foundation; either version 2 of the License, or * |
| 18 | + * (at your option) any later version. * |
| 19 | + * * |
| 20 | + ***************************************************************************/ |
| 21 | +""" |
| 22 | + |
| 23 | +from PyQt4.QtCore import QVariant, QDate, QTime, QDateTime, QByteArray |
| 24 | +from PyQt4.QtSql import QSqlDatabase, QSqlQuery, QSqlField |
| 25 | + |
| 26 | +paramstyle = "qmark" |
| 27 | +threadsafety = 1 |
| 28 | +apilevel = "2.0" |
| 29 | + |
| 30 | +import time |
| 31 | +import datetime |
| 32 | + |
| 33 | + |
| 34 | +def Date(year, month, day): |
| 35 | + return datetime.date(year, month, day) |
| 36 | + |
| 37 | + |
| 38 | +def Time(hour, minute, second): |
| 39 | + return datetime.time(hour, minute, second) |
| 40 | + |
| 41 | + |
| 42 | +def Timestamp(year, month, day, hour, minute, second): |
| 43 | + return datetime.datetime(year, month, day, hour, minute, second) |
| 44 | + |
| 45 | + |
| 46 | +def DateFromTicks(ticks): |
| 47 | + return Date(*time.localtime(ticks)[:3]) |
| 48 | + |
| 49 | + |
| 50 | +def TimeFromTicks(ticks): |
| 51 | + return Time(*time.localtime(ticks)[3:6]) |
| 52 | + |
| 53 | + |
| 54 | +def TimestampFromTicks(ticks): |
| 55 | + return Timestamp(*time.localtime(ticks)[:6]) |
| 56 | + |
| 57 | + |
| 58 | +class ConnectionError(StandardError): |
| 59 | + |
| 60 | + def __init__(self, *args, **kwargs): |
| 61 | + super(StandardError, self).__init__(*args, **kwargs) |
| 62 | + |
| 63 | + |
| 64 | +class ExecError(StandardError): |
| 65 | + |
| 66 | + def __init__(self, *args, **kwargs): |
| 67 | + super(StandardError, self).__init__(*args, **kwargs) |
| 68 | + |
| 69 | + |
| 70 | +class QtSqlDBCursor: |
| 71 | + |
| 72 | + def __init__(self, conn): |
| 73 | + self.qry = QSqlQuery(conn) |
| 74 | + self.description = None |
| 75 | + self.rowcount = -1 |
| 76 | + self.arraysize = 1 |
| 77 | + |
| 78 | + def close(self): |
| 79 | + self.qry.finish() |
| 80 | + |
| 81 | + def execute(self, operation, parameters=[]): |
| 82 | + if len(parameters) == 0: |
| 83 | + if not self.qry.exec_(operation): |
| 84 | + raise ExecError(self.qry.lastError().databaseText()) |
| 85 | + else: |
| 86 | + if not self.qry.prepare(operation): |
| 87 | + raise ExecError(self.qry.lastError().databaseText()) |
| 88 | + |
| 89 | + for i in range(len(parameters)): |
| 90 | + self.qry.bindValue(i, parameters[i]) |
| 91 | + |
| 92 | + if not self.qry.exec_(): |
| 93 | + raise ExecError(self.qry.lastError().databaseText()) |
| 94 | + |
| 95 | + self.rowcount = self.qry.size() |
| 96 | + self.description = [] |
| 97 | + for c in range(self.qry.record().count()): |
| 98 | + f = self.qry.record().field(c) |
| 99 | + |
| 100 | + if f.type() == QVariant.Date: |
| 101 | + t = Date |
| 102 | + elif f.type() == QVariant.Time: |
| 103 | + t = Time |
| 104 | + elif f.type() == QVariant.DateTime: |
| 105 | + t = Timestamp |
| 106 | + elif f.type() == QVariant.Double: |
| 107 | + t = float |
| 108 | + elif f.type() == QVariant.Int: |
| 109 | + t = int |
| 110 | + elif f.type() == QVariant.String: |
| 111 | + t = unicode |
| 112 | + elif f.type() == QVariant.ByteArray: |
| 113 | + t = unicode |
| 114 | + else: |
| 115 | + continue |
| 116 | + |
| 117 | + self.description.append([ |
| 118 | + f.name(), # name |
| 119 | + t, # type_code |
| 120 | + f.length(), # display_size |
| 121 | + f.length(), # internal_size |
| 122 | + f.precision(), # precision |
| 123 | + None, # scale |
| 124 | + f.requiredStatus() != QSqlField.Required # null_ok |
| 125 | + ]) |
| 126 | + |
| 127 | + def executemany(self, operation, seq_of_parameters): |
| 128 | + if len(seq_of_parameters) == 0: |
| 129 | + return |
| 130 | + |
| 131 | + if not self.qry.prepare(operation): |
| 132 | + raise ExecError(self.qry.lastError().databaseText()) |
| 133 | + |
| 134 | + for r in seq_of_parameters: |
| 135 | + for i in range(len(r)): |
| 136 | + self.qry.bindValue(i, r[i]) |
| 137 | + |
| 138 | + if not self.qry.exec_(): |
| 139 | + raise ExecError(self.qry.lastError().databaseText()) |
| 140 | + |
| 141 | + def scroll(self, row): |
| 142 | + return self.qry.seek(row) |
| 143 | + |
| 144 | + def fetchone(self): |
| 145 | + if not self.qry.next(): |
| 146 | + return None |
| 147 | + |
| 148 | + row = [] |
| 149 | + for i in range(len(self.description)): |
| 150 | + value = self.qry.value(i) |
| 151 | + if (isinstance(value, QDate) |
| 152 | + or isinstance(value, QTime) |
| 153 | + or isinstance(value, QDateTime)): |
| 154 | + value = value.toString() |
| 155 | + elif isinstance(value, QByteArray): |
| 156 | + value = u"GEOMETRY" |
| 157 | + # value = value.toHex() |
| 158 | + |
| 159 | + row.append(value) |
| 160 | + |
| 161 | + return row |
| 162 | + |
| 163 | + def fetchmany(self, size=10): |
| 164 | + rows = [] |
| 165 | + while len(rows) < size: |
| 166 | + row = self.fetchone() |
| 167 | + if row is None: |
| 168 | + break |
| 169 | + rows.append(row) |
| 170 | + |
| 171 | + return rows |
| 172 | + |
| 173 | + def fetchall(self): |
| 174 | + rows = [] |
| 175 | + while True: |
| 176 | + row = self.fetchone() |
| 177 | + if row is None: |
| 178 | + break |
| 179 | + rows.append(row) |
| 180 | + |
| 181 | + return rows |
| 182 | + |
| 183 | + def setinputsize(self, sizes): |
| 184 | + raise ExecError("nyi") |
| 185 | + |
| 186 | + def setoutputsize(self, size, column=None): |
| 187 | + raise ExecError("nyi") |
| 188 | + |
| 189 | + |
| 190 | +class QtSqlDBConnection: |
| 191 | + connections = 0 |
| 192 | + |
| 193 | + def __init__(self, driver, dbname, user, passwd): |
| 194 | + self.conn = QSqlDatabase.addDatabase( |
| 195 | + driver, "qtsql_%d" % QtSqlDBConnection.connections) |
| 196 | + QtSqlDBConnection.connections += 1 |
| 197 | + self.conn.setDatabaseName(dbname) |
| 198 | + self.conn.setUserName(user) |
| 199 | + self.conn.setPassword(passwd) |
| 200 | + |
| 201 | + if not self.conn.open(): |
| 202 | + raise ConnectionError(self.conn.lastError().databaseText()) |
| 203 | + |
| 204 | + def close(self): |
| 205 | + self.conn.close() |
| 206 | + |
| 207 | + def commit(self): |
| 208 | + self.conn.commit() |
| 209 | + |
| 210 | + def rollback(self): |
| 211 | + self.conn.rollback() |
| 212 | + |
| 213 | + def cursor(self): |
| 214 | + return QtSqlDBCursor(self.conn) |
| 215 | + |
| 216 | + |
| 217 | +def connect(driver, dbname, user, passwd): |
| 218 | + return QtSqlDBConnection(driver, dbname, user, passwd) |
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