66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
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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.contrib.gis.db import models
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from django.contrib.gis.db.models.fields import GeometryField
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from django.contrib.gis.db.backends.base 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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managed = False
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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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# Optional geometry representing the bounds of this coordinate
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# system. By default, all are NULL in the table.
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cs_bounds = models.PolygonField(null=True)
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objects = models.GeoManager()
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class Meta:
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db_table = 'CS_SRS'
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managed = False
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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'
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