Updating the attribute table of feature using PyQGIS

Question

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

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

Answer 1

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 committing 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)

• Joseph: @BipinThapaliya - Most welcome, glad it helped :)
• Chetan Vashisth: Not working for me .Tried both of these versions. I am exhausted ;(
• Joseph: @ChetanVashisth - Post a question with what you tried and hopefully people will respond :)
• Chetan Vashisth: I have just tried your code above and its not working and i just want to update a field in the attribute table. So i thought i do not have to ask a question for that.. :)
• Jochen Schwarze: I'm getting a NameError 'edit' is not defined...

Answer 2

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

• Romário Carvalho Neto: Worked for me on QGIS 3.10
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