How to update the attribute table of feature using PyQGIS?

Question

Following code updates the value of field ("name") in console  and shows the result but actual attribute table does not get update .Can anybody suggest the error in code.

layer=iface.activeLayer()

selected_feature=layer.selectedFeatures()

layer.startEditing()

for feature in selected_feature:

feature["name"]="Test name"

layer.commitChanges()

Joseph · Accepted Answer

You need to update the layer with the new feature values using:

layer.updateFeature(feature)

So it should look something like:

layer = iface.activeLayer()
selected_feature = layer.selectedFeatures()
layer.startEditing()
for feature in selected_feature:
    feature["name"] = "Test name"
    layer.updateFeature(feature)

layer.commitChanges()

Or shorten it slightly by editing and commiting the changes in one go using with edit():

layer = iface.activeLayer()
selected_feature = layer.selectedFeatures()
with edit(layer):
    for feature in selected_feature:
        feature["name"] = "Test name"
        layer.updateFeature(feature)

Romário Carvalho Neto · Answer

QgsProject.instance().reloadAllLayers() worked for me on QGIS 3.10.

How to update the attribute table of feature using PyQGIS?

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