/django/contrib/gis/db/backends/postgis/models.py
Python | 66 lines | 61 code | 1 blank | 4 comment | 0 complexity | 1977605e79b1cd6fecaf4f8f0e745c54 MD5 | raw file
Possible License(s): BSD-3-Clause
- """
- The GeometryColumns and SpatialRefSys models for the PostGIS backend.
- """
- from django.db import models
- from django.contrib.gis.db.backends.base import SpatialRefSysMixin
- class GeometryColumns(models.Model):
- """
- The 'geometry_columns' table from the PostGIS. See the PostGIS
- documentation at Ch. 4.2.2.
- """
- f_table_catalog = models.CharField(max_length=256)
- f_table_schema = models.CharField(max_length=256)
- f_table_name = models.CharField(max_length=256)
- f_geometry_column = models.CharField(max_length=256)
- coord_dimension = models.IntegerField()
- srid = models.IntegerField(primary_key=True)
- type = models.CharField(max_length=30)
- class Meta:
- db_table = 'geometry_columns'
- managed = False
- @classmethod
- def table_name_col(cls):
- """
- Returns the name of the metadata column used to store the
- the feature table name.
- """
- return 'f_table_name'
- @classmethod
- def geom_col_name(cls):
- """
- Returns the name of the metadata column used to store the
- the feature geometry column.
- """
- return 'f_geometry_column'
- def __unicode__(self):
- return "%s.%s - %dD %s field (SRID: %d)" % \
- (self.f_table_name, self.f_geometry_column,
- self.coord_dimension, self.type, self.srid)
- class SpatialRefSys(models.Model, SpatialRefSysMixin):
- """
- The 'spatial_ref_sys' table from PostGIS. See the PostGIS
- documentaiton at Ch. 4.2.1.
- """
- srid = models.IntegerField(primary_key=True)
- auth_name = models.CharField(max_length=256)
- auth_srid = models.IntegerField()
- srtext = models.CharField(max_length=2048)
- proj4text = models.CharField(max_length=2048)
- class Meta:
- db_table = 'spatial_ref_sys'
- managed = False
- @property
- def wkt(self):
- return self.srtext
- @classmethod
- def wkt_col(cls):
- return 'srtext'