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Diffstat (limited to 'django/contrib/gis/db/backends/postgis/models.py')
-rw-r--r-- | django/contrib/gis/db/backends/postgis/models.py | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/django/contrib/gis/db/backends/postgis/models.py b/django/contrib/gis/db/backends/postgis/models.py new file mode 100644 index 0000000000..57d660d7c2 --- /dev/null +++ b/django/contrib/gis/db/backends/postgis/models.py @@ -0,0 +1,68 @@ +""" + 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: + app_label = 'gis' + 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: + app_label = 'gis' + db_table = 'spatial_ref_sys' + managed = False + + @property + def wkt(self): + return self.srtext + + @classmethod + def wkt_col(cls): + return 'srtext' |