app/django/contrib/gis/db/backend/oracle/models.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Tue, 14 Oct 2008 16:00:59 +0000
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"""
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 The GeometryColumns and SpatialRefSys models for the Oracle spatial
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 backend.
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 It should be noted that Oracle Spatial does not have database tables
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 named according to the OGC standard, so the closest analogs are used.
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 For example, the `USER_SDO_GEOM_METADATA` is used for the GeometryColumns
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 model and the `SDO_COORD_REF_SYS` is used for the SpatialRefSys model.
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"""
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from django.db import models
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from django.contrib.gis.models import SpatialRefSysMixin
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class GeometryColumns(models.Model):
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    "Maps to the Oracle USER_SDO_GEOM_METADATA table."
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    table_name = models.CharField(max_length=32)
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    column_name = models.CharField(max_length=1024)
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    srid = models.IntegerField(primary_key=True)
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    # TODO: Add support for `diminfo` column (type MDSYS.SDO_DIM_ARRAY).
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    class Meta:
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        db_table = 'USER_SDO_GEOM_METADATA'
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    @classmethod
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    def table_name_col(cls):
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        """
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        Returns the name of the metadata column used to store the 
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        the feature table name.
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        """
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        return 'table_name'
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    @classmethod
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    def geom_col_name(cls):
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        """
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        Returns the name of the metadata column used to store the 
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        the feature geometry column.
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        """
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        return 'column_name'
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    def __unicode__(self):
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        return '%s - %s (SRID: %s)' % (self.table_name, self.column_name, self.srid)
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class SpatialRefSys(models.Model, SpatialRefSysMixin):
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    "Maps to the Oracle MDSYS.CS_SRS table."
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    cs_name = models.CharField(max_length=68)
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    srid = models.IntegerField(primary_key=True)
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    auth_srid = models.IntegerField()
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    auth_name = models.CharField(max_length=256)
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    wktext = models.CharField(max_length=2046)
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    #cs_bounds = models.GeometryField()
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    class Meta:
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        # TODO: Figure out way to have this be MDSYS.CS_SRS without
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        #  having django's quoting mess up the SQL.
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        db_table = 'CS_SRS'
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    @property
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    def wkt(self):
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        return self.wktext
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    @classmethod
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    def wkt_col(cls):
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        return 'wktext'