Mercurial > hg > ZDBInterface

annotate ZDBInterfaceFolder.py @ 12:09882d5a3989

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fix bug with _max and _skip. add _size and _start as alias.
author casties
date Thu, 07 Jul 2011 19:22:29 +0200
parents 283c01ebe96e
children cf03ab908a2b
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3
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1 '''
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2 Created on 14.2.2011
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3
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4 @author: casties
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5 '''
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6
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7 from OFS.Folder import Folder
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8 from Products.PageTemplates.PageTemplateFile import PageTemplateFile
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9 from AccessControl import getSecurityManager, Unauthorized
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10 import logging
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11 import re
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12
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13 from DBInterface import *
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14
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15
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16 class ZDBInterfaceFolder(DBInterface, Folder):
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17 """Folder for database queries
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18 """
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19
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20 meta_type="ZDBInterfaceFolder"
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21 manage_options=Folder.manage_options+(
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22 {'label':'Config','action':'manage_editZDBInterfaceFolderForm'},
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23 )
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24
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25 # management templates
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26 manage_editZDBInterfaceFolderForm=PageTemplateFile('zpt/editZDBInterfaceFolder',globals())
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27
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28
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29 def __init__(self, id, title, connection_id=None, autocommit=False, default_search='bw'):
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30 """init"""
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31 self.id = id
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32 self.title = title
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33 # database connection id
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34 self.connection_id = connection_id
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35 # set db connection to autocommit
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36 self.autocommit = autocommit
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37 # default text search mode
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38 self.default_search = default_search
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39
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40 def getSQLQuery(self, table, argv):
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41 """returns dict with SQL query string and args"""
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42 logging.debug("getSQLquery table=%s argv=%s"%(table,argv))
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43 args = []
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44 select = "*"
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45 order = None
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46 wheres = []
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47 whereOp = "AND"
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48 processed = {}
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49 unprocessed = {}
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50 limit = None
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51 offset = None
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52
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53 def doOp(op, param, val):
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54 # handles comparison operations in WHERE clause
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55 logging.debug("doop op=%s param=%s val=%s"%(op,param,val))
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56 if isinstance(val, list):
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57 # join multiple parameters with spaces (makes sense with checkbox and -op=all)
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58 val = " ".join(val)
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59
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60 # string comparisons are case-insensitive
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61 if isinstance(val, basestring):
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62 param = "LOWER(%s)"%param
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63 val = val.lower()
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64
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65 if op == "eq":
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66 wheres.append(param + " = %s")
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67 args.append(val)
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68 elif op == "lt":
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69 wheres.append(param + " < %s")
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70 args.append(val)
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71 elif op == "gt":
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72 wheres.append(param + " > %s")
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73 args.append(val)
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74 elif op == "ew":
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75 wheres.append(param + " ILIKE %s")
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76 args.append("%" + val)
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77 elif op == "bw":
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78 wheres.append(param + " ILIKE %s")
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79 args.append(val + "%")
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80 elif op == "ct":
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81 wheres.append(param + " ILIKE %s")
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82 args.append("%" + val + "%")
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83 elif op == "all":
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84 words = []
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85 for word in val.split(" "):
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86 words.append(param + " ILIKE %s")
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87 args.append("%" + word + "%")
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88 wheres.append("(" + " AND ".join(words) + ")")
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89 elif op == "one":
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90 words = []
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91 for word in val.split(" "):
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92 words.append(param + " ILIKE %s")
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93 args.append("%" + word + "%")
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94 wheres.append("(" + " OR ".join(words) + ")")
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95 else:
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96 logging.error("getSQLquery: unknown op=%s!"%op)
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97
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98 return
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99
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100 # evaluate argv
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101 for (key, val) in argv.items():
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102 logging.debug("process key=%s val=%s"%(key,val))
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103 if key in processed:
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104 # parameter has been processed
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105 logging.debug(" key=%s processed"%(key))
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106 continue
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107
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108 # beginning of a command should always be "_"
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109 if key[0] == "-":
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110 key = "_" + key[1:]
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111
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112 if key == "_select":
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113 # SELECT expression
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114 select = sqlName(val, more="*,")
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115 elif key == "_sort":
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116 # sort i.e. ORDER BY expression
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117 order = sqlName(val, more=",")
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118 elif key == "_lop":
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119 # logical operation joining WHERE clauses
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120 whereOp = sqlName(val)
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121 elif key == "_max" or key == "_size":
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122 # number of results
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123 limit = sqlName(val)
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124 elif key == "_skip" or key == "_start":
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125 logging.debug("SKIP!")
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126 # start at result number
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127 offset = sqlName(val)
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128 elif key[:3] == "_op":
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129 # operation parameters _op_param=val
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130 param = sqlName(key[4:])
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131 logging.debug("param=%s key=%s val=%s"%(param,key,val))
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132 if param in argv:
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133 doOp(val, param, argv[param])
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134 processed[param] = True
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135 else:
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136 # no corresponding parameter
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137 logging.error("getSQLquery: param=%s for op not found!"%param)
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138 else:
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139 # parameter=value pair
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140 unprocessed[key] = val
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141
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142 # process remaining parameters (without _op)
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143 for (key, val) in unprocessed.items():
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144 if key not in processed:
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145 param = sqlName(key)
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146 # default operation
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147 doOp(self.default_search, param, val)
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148
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149 # join it all
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150 query = "SELECT %s FROM %s"%(select, table)
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151 if wheres:
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152 query += " WHERE " + (" " + whereOp + " ").join(wheres)
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153
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154 if order:
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155 query += " ORDER BY " + order
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156
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157 if limit:
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158 query += " LIMIT " + limit
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159
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160 if offset:
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161 query += " OFFSET " + offset
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162
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163 return {'query' : query, 'args' : args}
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164
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165 def ZDBInlineSearch(self, _table=None, **argv):
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166 """returns result set from search with given parameters"""
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167 query = self.getSQLQuery(_table, argv)
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168 result = self.executeZSQL(query['query'], query['args'])
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169 return result
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170
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171 def manage_editZDBInterfaceFolder(self, title=None, connection_id=None, autocommit=None, default_search=None,
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172 REQUEST=None):
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173 """Change the object"""
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174 logging.debug("editZDBInterfaceFolder title=%s, connection_id=%s, autocommit=%s default_search=%s"%(title,connection_id,autocommit,default_search))
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175 if title is not None:
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176 self.title = title
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177
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178 if connection_id is not None:
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179 self.connection_id = connection_id
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180
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181 if default_search is not None:
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182 self.default_search = default_search
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183
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184 self.autocommit = (autocommit == "on")
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185
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186 #checkPermission=getSecurityManager().checkPermission
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187 REQUEST.RESPONSE.redirect('manage_main')
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188
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189
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190 manage_addZDBInterfaceFolderForm=PageTemplateFile('zpt/addZDBInterfaceFolder',globals())
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191
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192 def manage_addZDBInterfaceFolder(self, id, title='', label='', description='',
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193 createPublic=0,
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194 createUserF=0,
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195 REQUEST=None):
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196 """Add a new object with id *id*."""
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197
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198 ob=ZDBInterfaceFolder(str(id),title)
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199 self._setObject(id, ob)
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200
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201 #checkPermission=getSecurityManager().checkPermission
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202 REQUEST.RESPONSE.redirect('manage_main')
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203
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204