/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/postgisdb.py
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revision 1620 by bh, Wed Aug 20 13:14:22 2003 UTC revision 1636 by bh, Fri Aug 22 17:20:29 2003 UTC
# Line 20  import wellknowntext Line 20  import wellknowntext
20    
21  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT, RAW_WKT  from data import SHAPETYPE_POLYGON, SHAPETYPE_ARC, SHAPETYPE_POINT, RAW_WKT
22    
23    def has_postgis_support():
24        """Return whether this Thuban instance supports PostGIS connections
25    
26        Having PostGIS support means that the psycopg module can be
27        imported.
28        """
29        return psycopg is not None
30    
31    def psycopg_version():
32        return psycopg.__version__
33    
34  if psycopg is not None:  if psycopg is not None:
35      type_map = [(psycopg.STRING, table.FIELDTYPE_STRING),      type_map = [(psycopg.STRING, table.FIELDTYPE_STRING),
36                  (psycopg.INTEGER, table.FIELDTYPE_INT),                  (psycopg.INTEGER, table.FIELDTYPE_INT),
37                  (psycopg.FLOAT, table.FIELDTYPE_DOUBLE)]                  (psycopg.FLOAT, table.FIELDTYPE_DOUBLE)]
38    
39    
40    class ConnectionError(Exception):
41    
42        """Class for exceptions occurring when establishing a Databse connection"""
43    
44    
45  class PostGISConnection:  class PostGISConnection:
46    
47      """Represent a PostGIS database      """Represent a PostGIS database
# Line 57  class PostGISConnection: Line 73  class PostGISConnection:
73              val = getattr(self, name)              val = getattr(self, name)
74              if val:              if val:
75                  params.append("%s=%s" % (name, val))                  params.append("%s=%s" % (name, val))
76          self.connection = psycopg.connect(" ".join(params))          try:
77                self.connection = psycopg.connect(" ".join(params))
78            except psycopg.OperationalError, val:
79                raise ConnectionError(str(val))
80    
81          # determine the OID for the geometry type. This is PostGIS          # determine the OID for the geometry type. This is PostGIS
82          # specific.          # specific.
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