Class: QgsCachedFeatureWriterIterator

class qgis.core.QgsCachedFeatureWriterIterator(vlCache: QgsVectorLayerCache, featureRequest: QgsFeatureRequest)

Bases: qgis._core.QgsAbstractFeatureIterator

This constructor creates a feature iterator, which queries the backend and caches retrieved features.

Parameters:
  • vlCache – The vector layer cache to use
  • featureRequest – The feature request to answer

QgsCachedFeatureWriterIterator(QgsCachedFeatureWriterIterator)

Uses another iterator as backend and writes features to the cache

Enums

Methods

close Close this iterator.
deref
fetchFeature Implementation for fetching a feature.
filterRectToSourceCrs
geometryToDestinationCrs
nextFeatureFilterExpression
nextFeatureFilterFids
prepareSimplification
ref
rewind Rewind to the beginning of the iterator

Signals

Attributes

close(self) → bool

Close this iterator. No further features will be available.

Returns:True if successful
deref()
fetchFeature(self, f: QgsFeature) → bool

Implementation for fetching a feature.

Parameters:f – Will write to this feature
Returns:bool True if the operation was OK

See also

bool()

filterRectToSourceCrs()
geometryToDestinationCrs()
nextFeatureFilterExpression()
nextFeatureFilterFids()
prepareSimplification()
ref()
rewind(self) → bool

Rewind to the beginning of the iterator

Returns:bool True if the operation was OK