def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
python类Field()的实例源码
def from_db_value(self, value, expression, connection, context):
if value:
if not isinstance(value, Geometry):
value = Geometry(value)
srid = value.srid
if not srid and self.srid != -1:
value.srid = self.srid
return value
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def __init__(self, sql, params, output_field=None):
if output_field is None:
output_field = fields.Field()
self.sql, self.params = sql, params
super(RawSQL, self).__init__(output_field=output_field)
def from_db_value(self, value, expression, connection, context):
if value:
if not isinstance(value, Geometry):
value = Geometry(value)
srid = value.srid
if not srid and self.srid != -1:
value.srid = self.srid
return value
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def from_db_value(self, value, expression, connection, context):
if value:
if not isinstance(value, Geometry):
value = Geometry(value)
srid = value.srid
if not srid and self.srid != -1:
value.srid = self.srid
return value
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def get_srid(self, geom):
"""
Returns the default SRID for the given geometry, taking into account
the SRID set for the field. For example, if the input geometry
has no SRID, then that of the field will be returned.
"""
gsrid = geom.srid # SRID of given geometry.
if gsrid is None or self.srid == -1 or (gsrid == -1 and self.srid != -1):
return self.srid
else:
return gsrid
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def from_db_value(self, value, expression, connection, context):
if value:
if not isinstance(value, Geometry):
value = Geometry(value)
srid = value.srid
if not srid and self.srid != -1:
value.srid = self.srid
return value
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def __init__(self, sql, params, output_field=None):
if output_field is None:
output_field = fields.Field()
self.sql, self.params = sql, params
super(RawSQL, self).__init__(output_field=output_field)
def get_srid(self, geom):
"""
Returns the default SRID for the given geometry, taking into account
the SRID set for the field. For example, if the input geometry
has no SRID, then that of the field will be returned.
"""
gsrid = geom.srid # SRID of given geometry.
if gsrid is None or self.srid == -1 or (gsrid == -1 and self.srid != -1):
return self.srid
else:
return gsrid
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def get_srid(self, geom):
"""
Returns the default SRID for the given geometry, taking into account
the SRID set for the field. For example, if the input geometry
has no SRID, then that of the field will be returned.
"""
gsrid = geom.srid # SRID of given geometry.
if gsrid is None or self.srid == -1 or (gsrid == -1 and self.srid != -1):
return self.srid
else:
return gsrid
# ### Routines overloaded from Field ###
def num_geom(self, **kwargs):
"""
Returns the number of geometries if the field is a
GeometryCollection or Multi* Field in a `num_geom`
attribute on each element of this GeoQuerySet; otherwise
the sets with None.
"""
return self._spatial_attribute('num_geom', {}, **kwargs)
def _prepare(self, field):
"""
Hook used by Field.get_prep_lookup() to do custom preparation.
"""
return self
def __init__(self, sql, params, output_field=None):
if output_field is None:
output_field = fields.Field()
self.sql, self.params = sql, params
super(RawSQL, self).__init__(output_field=output_field)
def from_db_value(self, value, expression, connection, context):
if value:
if not isinstance(value, Geometry):
value = Geometry(value)
srid = value.srid
if not srid and self.srid != -1:
value.srid = self.srid
return value
# ### Routines overloaded from Field ###
