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Revision 7641, 1.7 kB
(checked in by jbronn, 3 weeks ago)
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gis: Refactor of the GeoQuerySet; new features include:
(1) Creation of internal API that eases generation of GeoQuerySet methods.
(2) GeoQuerySet.distance now returns Distance objects instead of floats.
(3) Added the new GeoQuerySet methods: area, centroid, difference, envelope, intersection, length, make_line, mem_size, num_geom, num_points, perimeter, point_on_surface, scale, svg, sym_difference, translate, union.
(4) The model_att keyword may be used to customize the attribute that GeoQuerySet methods attach output to.
(5) Geographic distance lookups and GeoQuerySet.distance calls now use ST_distance_sphere by default (performance benefits far outweigh small loss in accuracy); ST_distance_spheroid may still be used by specifying an option.
(6) GeoQuerySet methods may now operate accross ForeignKey? relations specified via the field_name keyword (but this does not work on Oracle).
(7) Area now has the same units of measure as Distance.
Backward Incompatibilites:
- The aggregate union method is now known as unionagg.
- The field_name keyword used for GeoQuerySet methods may no longer be specified via positional arguments.
- Distance objects returned instead of floats from GeoQuerySet.distance.
- ST_Distance_sphere used by default for geographic distance calculations.
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__all__ = ['create_spatial_db', 'get_geo_where_clause', 'SpatialBackend'] |
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from django.contrib.gis.db.backend.base import BaseSpatialBackend |
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from django.contrib.gis.db.backend.oracle.adaptor import OracleSpatialAdaptor |
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from django.contrib.gis.db.backend.oracle.creation import create_spatial_db |
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from django.contrib.gis.db.backend.oracle.field import OracleSpatialField |
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from django.contrib.gis.db.backend.oracle.query import * |
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SpatialBackend = BaseSpatialBackend(name='oracle', oracle=True, |
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area=AREA, |
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centroid=CENTROID, |
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difference=DIFFERENCE, |
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distance=DISTANCE, |
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distance_functions=DISTANCE_FUNCTIONS, |
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gis_terms=ORACLE_SPATIAL_TERMS, |
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gml=ASGML, |
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intersection=INTERSECTION, |
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length=LENGTH, |
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limited_where = {'relate' : None}, |
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num_geom=NUM_GEOM, |
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num_points=NUM_POINTS, |
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perimeter=LENGTH, |
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point_on_surface=POINT_ON_SURFACE, |
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select=GEOM_SELECT, |
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sym_difference=SYM_DIFFERENCE, |
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transform=TRANSFORM, |
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unionagg=UNIONAGG, |
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union=UNION, |
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Adaptor=OracleSpatialAdaptor, |
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Field=OracleSpatialField, |
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) |
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