Class: QgsFeaturePool¶

class qgis.analysis.QgsFeaturePool(layer: QgsVectorLayer)¶

Bases: qgis._core.QgsFeatureSink

Creates a new feature pool for layer.

A feature pool is based on a vector layer and caches features.

Note

This class is a technology preview and unstable API.

New in version 3.4: Enums

Methods

`crs`	The coordinate reference system of this layer.
`deleteFeature`	Removes a feature from this pool.
`geometryType`	The geometry type of this layer.
`getFeature`	Retrieves the feature with the specified `id` into `feature`.
`layer`	Gets a pointer to the underlying layer.
`layerId`	The layer id of the layer.
`layerName`	Returns the name of the layer.
`updateFeature`	Updates a feature in this pool.

Signals

Attributes

crs(self) → QgsCoordinateReferenceSystem¶: The coordinate reference system of this layer.

deleteFeature(self, fid: int)¶: Removes a feature from this pool. Implementations will remove the feature from the layer or from the data provider.

geometryType(self) → QgsWkbTypes.GeometryType¶: The geometry type of this layer.

getFeature(self, id: int, feature: QgsFeature) → bool¶: Retrieves the feature with the specified id into feature. It will be retrieved from the cache or from the underlying feature source if unavailable. If the feature is neither available from the cache nor from the source it will return False.

layer(self) → QgsVectorLayer¶: Gets a pointer to the underlying layer. May return a ``None`` if the layer has been deleted. This must only be called from the main thread.

layerName(self) → str¶

Returns the name of the layer.

Should be preferred over layer().name() because it can directly be run on the background thread.

updateFeature(self, feature: QgsFeature)¶: Updates a feature in this pool. Implementations will update the feature on the layer or on the data provider.