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()

score 9 · Accepted Answer · edited Nov 17 '22 at 18:35

9

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)

edited Nov 17 '22 at 18:35

Taras

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answered Mar 28 '19 at 10:50

Joseph

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@BipinThapaliya - Most welcome, glad it helped :) – Joseph Mar 29 '19 at 11:20
1

Not working for me .Tried both of these versions. I am exhausted ;( – Chetan Vashisth Aug 01 '19 at 12:41
@ChetanVashisth - Post a question with what you tried and hopefully people will respond :) – Joseph Aug 01 '19 at 12:43
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.. :) – Chetan Vashisth Aug 01 '19 at 12:45
I'm getting a NameError 'edit' is not defined... – Jochen Schwarze Jul 22 '20 at 13:42

score -1 · Answer 2 · edited Apr 10 '21 at 20:46

-1

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

edited Apr 10 '21 at 20:46

Kadir Şahbaz

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answered Apr 09 '21 at 13:19

Romário Carvalho Neto

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Worked for me on QGIS 3.10 – Romário Carvalho Neto Apr 09 '21 at 13:20
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Welcome to GIS SE! As a new user please take the [tour]. A good answer should include details about how to use your suggestion and info about what it does. Please [edit] your answer to add additional info. – Midavalo Apr 09 '21 at 15:32

Updating the attribute table of feature using PyQGIS

2 Answers2

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