Source Code for Module orm2.adapters.mysql.datatypes

  1  #!/usr/bin/env python 
  2  # -*- coding: iso-8859-1 -*- 
  3   
  4  ##  This file is part of orm, The Object Relational Membrane Version 2. 
  5  ## 
  6  ##  Copyright 2002-2006 by Diedrich Vorberg <diedrich@tux4web.de> 
  7  ## 
  8  ##  All Rights Reserved 
  9  ## 
 10  ##  For more Information on orm see the README file. 
 11  ## 
 12  ##  This program is free software; you can redistribute it and/or modify 
 13  ##  it under the terms of the GNU General Public License as published by 
 14  ##  the Free Software Foundation; either version 2 of the License, or 
 15  ##  (at your option) any later version. 
 16  ## 
 17  ##  This program is distributed in the hope that it will be useful, 
 18  ##  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 19  ##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 20  ##  GNU General Public License for more details. 
 21  ## 
 22  ##  You should have received a copy of the GNU General Public License 
 23  ##  along with this program; if not, write to the Free Software 
 24  ##  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
 25  ## 
 26  ##  I have added a copy of the GPL in the file gpl.txt. 
 27   
 28   
 29  # Changelog 
 30  # --------- 
 31  # 
 32  # $Log: datatypes.py,v $ 
 33  # Revision 1.4  2007/12/30 00:58:25  diedrich 
 34  # Added binary literal. 
 35  # 
 36  # Revision 1.3  2006/05/13 17:23:41  diedrich 
 37  # Massive docstring update. 
 38  # 
 39  # Revision 1.2  2006/05/10 21:55:41  diedrich 
 40  # Changed default for validators parameter to () rather than None 
 41  # 
 42  # Revision 1.1  2006/05/02 13:32:01  diedrich 
 43  # Ported mysql adapter from orm v.1 
 44  # 
 45  # 
 46  # 
 47  # 
 48   
 49  """ 
 50  This module implements datatype classes that are specific to MySQL 
 51  """ 
 52   
 53  # Python 
 54  import sys 
 55  from types import * 
 56  from string import * 
 57   
 58  # orm 
 59  from orm2.datatypes import * 
 60   
 61 -class auto_increment(integer): 
 62      """ 
 63      This datatype is for INTEGER columns using MySQL's AUTO_INCREMENT 
 64      functionality. They usually serve as primary keys. 
 65      """ 
 66       
 67 -    def __init__(self, column=None, title=None, 
 68                   validators=(), widget_specs=()): 
 69          integer.__init__(self, column, title, validators, widget_specs, 
 70                           has_default=True) 
 71       
 72 -    def __select_after_insert__(self, dbobj): 
 73          # When we've already got a value, we can't be inserted again.         
 74          if self.isset(dbobj): 
 75              tpl = ( self.attribute_name, 
 76                      self.dbclass.__name__, 
 77                      dbobj.__primary_key_column__(), 
 78                      dbobj.__primary_key_literal__(), ) 
 79               
 80              raise ObjectAlreadyInserted( 
 81                  "Attribute %s of '%s' (%s=%s) has already been set." % tpl) 
 82           
 83          return True 
 84   
 85 -    def __set__(self, dbobj, value): 
 86          if self.isset(dbobj): 
 87              raise ORMException( "A auto_increment property is not mutable, "+\ 
 88                                  "once it is on object creation" ) 
 89          else: 
 90              integer.__set__(self, dbobj, value) 
 91       
 92   
 93   
 94 -class binary_literal(sql.literal): 
 95 -    def __init__(self, bindata): 
 96          self.bindata = bindata 
 97   
 98 -    def __sql__(self, runner): 
 99          runner.params.append(self.bindata) 
100               
101          return "%s" 
102   
103 -class binary(datatype): 
104      python_class = str 
105      sql_literal_class = binary_literal 
106   
107   
108  blob = binary 
109  blob_literal = binary_literal 
110   
111   
112   
113  # Local variables: 
114  # mode: python 
115  # ispell-local-dictionary: "english" 
116  # End: 
117