Class: QgsCachedFeatureIterator¶

Delivers features from the cache.

Class Hierarchy¶

Base classes¶

QgsAbstractFeatureIterator

Internal feature iterator to be implemented within data providers.

Abstract Methods

`close`	Close this iterator.
`fetchFeature`	Implementation for fetching a feature.
`rewind`	Rewind to the beginning of the iterator

Virtual Methods

In PyQGIS, only methods marked as virtual can be safely overridden in a Python subclass of QgsCachedFeatureIterator. See the FAQ for more details.

nextFeatureFilterFids

We have a local special iterator for FilterFids, no need to run the generic.

class qgis.core.QgsCachedFeatureIterator[source]¶

Bases: QgsAbstractFeatureIterator

__init__(vlCache: QgsVectorLayerCache | None, featureRequest: QgsFeatureRequest)

This constructor creates a feature iterator, that delivers all cached features. No request is made to the backend.

Parameters:

vlCache (Optional[QgsVectorLayerCache]) – The vector layer cache to use
featureRequest (QgsFeatureRequest) – The feature request to answer

abstract close(self) → bool[source]¶

Close this iterator. No further features will be available.

Return type:: bool
Returns:: True if successful

abstract fetchFeature(self, f: QgsFeature) → bool[source]¶

Implementation for fetching a feature.

Parameters:: f (QgsFeature) – Will write to this feature
Return type:: bool
Returns:: bool True if the operation was OK

virtual nextFeatureFilterFids(self, f: QgsFeature) → bool[source]¶

We have a local special iterator for FilterFids, no need to run the generic.

Parameters:: f (QgsFeature) – Will write to this feature
Return type:: bool
Returns:: bool True if the operation was OK

abstract rewind(self) → bool[source]¶

Rewind to the beginning of the iterator

Return type:: bool
Returns:: bool True if the operation was OK