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from django.contrib.gis.db.backends.base.features import BaseSpatialFeatures
from django.db.backends.mysql.features import DatabaseFeatures as MySQLDatabaseFeatures
from django.utils.functional import cached_property
class DatabaseFeatures(BaseSpatialFeatures, MySQLDatabaseFeatures):
empty_intersection_returns_none = False
has_spatialrefsys_table = False
supports_add_srs_entry = False
supports_distance_geodetic = False
supports_length_geodetic = False
supports_area_geodetic = False
supports_transform = False
supports_null_geometries = False
supports_num_points_poly = False
unsupported_geojson_options = {"crs"}
@cached_property
def supports_geometry_field_unique_index(self):
# Not supported in MySQL since https://dev.mysql.com/worklog/task/?id=11808
return self.connection.mysql_is_mariadb
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