def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
python类GeometryField()的实例源码
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
if not HAS_GDAL and db_field.srid != self.map_srid:
raise ImproperlyConfigured(
"Map SRID is %s and SRID of `%s` is %s. GDAL must be "
"installed to perform the transformation."
% (self.map_srid, db_field, db_field.srid)
)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def feature_kwargs(self, feat):
"""
Given an OGR Feature, this will return a dictionary of keyword arguments
for constructing the mapped model.
"""
# The keyword arguments for model construction.
kwargs = {}
# Incrementing through each model field and OGR field in the
# dictionary mapping.
for field_name, ogr_name in self.mapping.items():
model_field = self.fields[field_name]
if isinstance(model_field, GeometryField):
# Verify OGR geometry.
try:
val = self.verify_geom(feat.geom, model_field)
except GDALException:
raise LayerMapError('Could not retrieve geometry from feature.')
elif isinstance(model_field, models.base.ModelBase):
# The related _model_, not a field was passed in -- indicating
# another mapping for the related Model.
val = self.verify_fk(feat, model_field, ogr_name)
else:
# Otherwise, verify OGR Field type.
val = self.verify_ogr_field(feat[ogr_name], model_field)
# Setting the keyword arguments for the field name with the
# value obtained above.
kwargs[field_name] = val
return kwargs
def geometry_field(self):
"Returns the GeometryField instance associated with the geographic column."
# Use `get_field()` on the model's options so that we
# get the correct field instance if there's model inheritance.
opts = self.model._meta
return opts.get_field(self.geom_field)
def make_multi(self, geom_type, model_field):
"""
Given the OGRGeomType for a geometry and its associated GeometryField,
determine whether the geometry should be turned into a GeometryCollection.
"""
return (geom_type.num in self.MULTI_TYPES and
model_field.__class__.__name__ == 'Multi%s' % geom_type.django)
def formfield_for_dbfield(self, db_field, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
kwargs.pop('request', None)
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, **kwargs)
def get_db_converters(self, expression):
converters = super(MySQLOperations, self).get_db_converters(expression)
if isinstance(expression.output_field, GeometryField) and self.uses_invalid_empty_geometry_collection:
converters.append(self.convert_invalid_empty_geometry_collection)
return converters
# https://dev.mysql.com/doc/refman/en/spatial-function-argument-handling.html
# MySQL 5.7.5 adds support for the empty geometry collections, but they are represented with invalid WKT.
def feature_kwargs(self, feat):
"""
Given an OGR Feature, this will return a dictionary of keyword arguments
for constructing the mapped model.
"""
# The keyword arguments for model construction.
kwargs = {}
# Incrementing through each model field and OGR field in the
# dictionary mapping.
for field_name, ogr_name in self.mapping.items():
model_field = self.fields[field_name]
if isinstance(model_field, GeometryField):
# Verify OGR geometry.
try:
val = self.verify_geom(feat.geom, model_field)
except GDALException:
raise LayerMapError('Could not retrieve geometry from feature.')
elif isinstance(model_field, models.base.ModelBase):
# The related _model_, not a field was passed in -- indicating
# another mapping for the related Model.
val = self.verify_fk(feat, model_field, ogr_name)
else:
# Otherwise, verify OGR Field type.
val = self.verify_ogr_field(feat[ogr_name], model_field)
# Setting the keyword arguments for the field name with the
# value obtained above.
kwargs[field_name] = val
return kwargs
def geometry_field(self):
"Returns the GeometryField instance associated with the geographic column."
# Use `get_field()` on the model's options so that we
# get the correct field instance if there's model inheritance.
opts = self.model._meta
return opts.get_field(self.geom_field)
def make_multi(self, geom_type, model_field):
"""
Given the OGRGeomType for a geometry and its associated GeometryField,
determine whether the geometry should be turned into a GeometryCollection.
"""
return (geom_type.num in self.MULTI_TYPES and
model_field.__class__.__name__ == 'Multi%s' % geom_type.django)
def get_db_converters(self, expression):
converters = super(MySQLOperations, self).get_db_converters(expression)
if isinstance(expression.output_field, GeometryField) and self.uses_invalid_empty_geometry_collection:
converters.append(self.convert_invalid_empty_geometry_collection)
return converters
# https://dev.mysql.com/doc/refman/en/spatial-function-argument-handling.html
# MySQL 5.7.5 adds support for the empty geometry collections, but they are represented with invalid WKT.
def feature_kwargs(self, feat):
"""
Given an OGR Feature, this will return a dictionary of keyword arguments
for constructing the mapped model.
"""
# The keyword arguments for model construction.
kwargs = {}
# Incrementing through each model field and OGR field in the
# dictionary mapping.
for field_name, ogr_name in self.mapping.items():
model_field = self.fields[field_name]
if isinstance(model_field, GeometryField):
# Verify OGR geometry.
try:
val = self.verify_geom(feat.geom, model_field)
except GDALException:
raise LayerMapError('Could not retrieve geometry from feature.')
elif isinstance(model_field, models.base.ModelBase):
# The related _model_, not a field was passed in -- indicating
# another mapping for the related Model.
val = self.verify_fk(feat, model_field, ogr_name)
else:
# Otherwise, verify OGR Field type.
val = self.verify_ogr_field(feat[ogr_name], model_field)
# Setting the keyword arguments for the field name with the
# value obtained above.
kwargs[field_name] = val
return kwargs
def geometry_field(self):
"Returns the GeometryField instance associated with the geographic column."
# Use `get_field()` on the model's options so that we
# get the correct field instance if there's model inheritance.
opts = self.model._meta
return opts.get_field(self.geom_field)
def make_multi(self, geom_type, model_field):
"""
Given the OGRGeomType for a geometry and its associated GeometryField,
determine whether the geometry should be turned into a GeometryCollection.
"""
return (geom_type.num in self.MULTI_TYPES and
model_field.__class__.__name__ == 'Multi%s' % geom_type.django)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def get_db_converters(self, expression):
converters = super(MySQLOperations, self).get_db_converters(expression)
if isinstance(expression.output_field, GeometryField) and self.uses_invalid_empty_geometry_collection:
converters.append(self.convert_invalid_empty_geometry_collection)
return converters
# https://dev.mysql.com/doc/refman/en/spatial-function-argument-handling.html
# MySQL 5.7.5 adds support for the empty geometry collections, but they are represented with invalid WKT.
def feature_kwargs(self, feat):
"""
Given an OGR Feature, this will return a dictionary of keyword arguments
for constructing the mapped model.
"""
# The keyword arguments for model construction.
kwargs = {}
# Incrementing through each model field and OGR field in the
# dictionary mapping.
for field_name, ogr_name in self.mapping.items():
model_field = self.fields[field_name]
if isinstance(model_field, GeometryField):
# Verify OGR geometry.
try:
val = self.verify_geom(feat.geom, model_field)
except GDALException:
raise LayerMapError('Could not retrieve geometry from feature.')
elif isinstance(model_field, models.base.ModelBase):
# The related _model_, not a field was passed in -- indicating
# another mapping for the related Model.
val = self.verify_fk(feat, model_field, ogr_name)
else:
# Otherwise, verify OGR Field type.
val = self.verify_ogr_field(feat[ogr_name], model_field)
# Setting the keyword arguments for the field name with the
# value obtained above.
kwargs[field_name] = val
return kwargs
def geometry_field(self):
"Returns the GeometryField instance associated with the geographic column."
# Use `get_field()` on the model's options so that we
# get the correct field instance if there's model inheritance.
opts = self.model._meta
return opts.get_field(self.geom_field)
def make_multi(self, geom_type, model_field):
"""
Given the OGRGeomType for a geometry and its associated GeometryField,
determine whether the geometry should be turned into a GeometryCollection.
"""
return (geom_type.num in self.MULTI_TYPES and
model_field.__class__.__name__ == 'Multi%s' % geom_type.django)
def formfield_for_dbfield(self, db_field, request, **kwargs):
"""
Overloaded from ModelAdmin so that an OpenLayersWidget is used
for viewing/editing 2D GeometryFields (OpenLayers 2 does not support
3D editing).
"""
if isinstance(db_field, models.GeometryField) and db_field.dim < 3:
# Setting the widget with the newly defined widget.
kwargs['widget'] = self.get_map_widget(db_field)
return db_field.formfield(**kwargs)
else:
return super(GeoModelAdmin, self).formfield_for_dbfield(db_field, request, **kwargs)
def contribute_to_class(self, cls, name, **kwargs):
super(GeometryField, self).contribute_to_class(cls, name, **kwargs)
def formfield(self, **kwargs):
defaults = {
'form_class': GoogleCoordsFormsField,
'zoom': self.zoom,
}
defaults.update(kwargs)
return super(GeometryField, self).formfield(**defaults)
def get_db_converters(self, expression):
converters = super(MySQLOperations, self).get_db_converters(expression)
if isinstance(expression.output_field, GeometryField) and self.uses_invalid_empty_geometry_collection:
converters.append(self.convert_invalid_empty_geometry_collection)
return converters
# https://dev.mysql.com/doc/refman/en/spatial-function-argument-handling.html
# MySQL 5.7.5 adds support for the empty geometry collections, but they are represented with invalid WKT.
def feature_kwargs(self, feat):
"""
Given an OGR Feature, this will return a dictionary of keyword arguments
for constructing the mapped model.
"""
# The keyword arguments for model construction.
kwargs = {}
# Incrementing through each model field and OGR field in the
# dictionary mapping.
for field_name, ogr_name in self.mapping.items():
model_field = self.fields[field_name]
if isinstance(model_field, GeometryField):
# Verify OGR geometry.
try:
val = self.verify_geom(feat.geom, model_field)
except GDALException:
raise LayerMapError('Could not retrieve geometry from feature.')
elif isinstance(model_field, models.base.ModelBase):
# The related _model_, not a field was passed in -- indicating
# another mapping for the related Model.
val = self.verify_fk(feat, model_field, ogr_name)
else:
# Otherwise, verify OGR Field type.
val = self.verify_ogr_field(feat[ogr_name], model_field)
# Setting the keyword arguments for the field name with the
# value obtained above.
kwargs[field_name] = val
return kwargs
def geometry_field(self):
"Returns the GeometryField instance associated with the geographic column."
# Use `get_field()` on the model's options so that we
# get the correct field instance if there's model inheritance.
opts = self.model._meta
return opts.get_field(self.geom_field)
