/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/transientdb.py
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revision 1961 by bh, Wed Nov 19 15:46:03 2003 UTC revision 2682 by dpinte, Mon May 15 20:11:15 2006 UTC
# Line 18  __version__ = "$Revision$" Line 18  __version__ = "$Revision$"
18  # $Source$  # $Source$
19  # $Id$  # $Id$
20    
21  from sqlite import connect  # Pysqlite version 1. and 2. behaves quiet differently
22    # Pysqlite uses a different paramstyle.  The older version
23    # support format and pyformat while pysqlite2 supports only qmark
24    # and named.
25    # The sqlite2 boolean variable is used to manage specific part of the code
26    try:
27          # Using SQLITE 2.x
28        sqlite2 = True
29        from pysqlite2 import dbapi2 as sqlite
30    except ImportError:
31          # Using SQLITE 1.x
32        sqlite2 = False
33        import sqlite
34        
35    
36  from base import TitledObject  from base import TitledObject
37    
# Line 40  class TransientDatabase: Line 53  class TransientDatabase:
53    
54      def __init__(self, filename):      def __init__(self, filename):
55          self.filename = filename          self.filename = filename
56          self.conn = connect(filename)          self.conn = sqlite.connect(filename)
57          # Counters to produce unique table and column names          # Counters to produce unique table and column names
58          self.num_tables = 0          self.num_tables = 0
59          self.num_cols = 0          self.num_cols = 0
# Line 353  class TransientTableBase: Line 366  class TransientTableBase:
366              right_template = right.internal_name              right_template = right.internal_name
367              params = ()              params = ()
368          else:          else:
369              right_template = "%s"              if sqlite2:
370                    right_template = "?"
371                else: right_template = "%s"
372              params = (right,)              params = (right,)
373    
374          query = "SELECT id FROM %s WHERE %s %s %s ORDER BY id;" \          query = "SELECT id FROM %s WHERE %s %s %s ORDER BY id;" \
# Line 408  class TransientTable(TitledObject, Trans Line 423  class TransientTable(TitledObject, Trans
423          # longer than any of the column names          # longer than any of the column names
424          id_key = max([len(col.name) for col in self.columns]) * "x"          id_key = max([len(col.name) for col in self.columns]) * "x"
425    
426          insert_template = "INSERT INTO %s (id, %s) VALUES (%%(%s)s, %s);" \          if sqlite2:
427                insert_template = "INSERT INTO %s (id, %s) VALUES (%s, %s);" \
428                                   % (self.tablename,
429                                      ", ".join([col.internal_name
430                                                 for col in self.columns]),
431                                      '?',
432                                      ", ".join(["?" for col in self.columns]))
433    
434            else:
435                insert_template = "INSERT INTO %s (id, %s) VALUES (%%(%s)s, %s);" \
436                                 % (self.tablename,                                 % (self.tablename,
437                                    ", ".join([col.internal_name                                    ", ".join([col.internal_name
438                                               for col in self.columns]),                                               for col in self.columns]),
# Line 419  class TransientTable(TitledObject, Trans Line 443  class TransientTable(TitledObject, Trans
443          for i in range(table.NumRows()):          for i in range(table.NumRows()):
444              row = table.ReadRowAsDict(i)              row = table.ReadRowAsDict(i)
445              row[id_key] = i              row[id_key] = i
446              cursor.execute(insert_template, row)              if sqlite2:
447                    params = [i]
448                    for col in self.columns:
449                      params.append(row[col.name])
450                    cursor.execute(insert_template, params)
451                else:  
452                    cursor.execute(insert_template, row)
453          self.db.conn.commit()          self.db.conn.commit()
454    
455    
# Line 659  class AutoTransientTable(TitledObject): Line 689  class AutoTransientTable(TitledObject):
689    
690      def Width(self, col):      def Width(self, col):
691          return self.table.Width(col)          return self.table.Width(col)
692    
693        def write_record(self, row, values):
694            """Write the values to the given row.
695    
696            This is a very experimental feature which doesn't work in all
697            cases, so you better know what you're doing when calling this
698            method.
699            """
700            self.table.write_record(row, values)
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