Hi all,solved. This is the right code:
provider = layer.dataProvider()
feat = QgsFeature()
allAttrs = provider.attributeIndexes()
provider.select(allAttrs)
caps = layer.dataProvider().capabilities()
fldDesc = provider.fieldNameIndex("values")
layer.startEditing()
arrayid=[]
while provider.nextFeature( feat ):
id = feat.id()
attrs = feat.attributeMap()
for (k,attr) in attrs.iteritems():
if k == fldDesc:
if attr != 2.5:
arrayid.append(id)
layer.dataProvider().deleteFeatures(arrayid)
layer.commitChanges()
thanks.l
Francesco
----Messaggio originale----
Da: [email protected]
Data: 13/01/2013 18.03
A: <[email protected]>
Ogg: [Qgis-developer] I: Re: Commit delete features
----Messaggio originale----
Da: [email protected]
Data: 13/01/2013 18.03
A: <[email protected]>
Ogg: R: Re: [Qgis-developer] Commit delete features
Hi Giovanni,this is my piece of code:
provider = layer.dataProvider()
feat = QgsFeature()
allAttrs = provider.attributeIndexes()
provider.select(allAttrs)
caps = layer.dataProvider().capabilities()
fldDesc = provider.fieldNameIndex("values")
layer.startEditing()
while provider.nextFeature( feat ):
id = feat.id()
attrs = feat.attributeMap()
for (k,attr) in attrs.iteritems():
if k == fldDesc:
if attr != 2.5:
layer.dataProvider().deleteFeatures([ id ])
layer.commitChanges()
layer.endEditCommand()
but it doesn't work. Any suggestions?
Thanks
Francesco
----Messaggio originale----
Da: [email protected]
Data: 13/01/2013 17.54
A: <[email protected]>
Ogg: Re: [Qgis-developer] Commit delete features
Have you called layer.startEditing()?
giovanni
Sent from Nexus
Il giorno 13/gen/2013 17:51, "[email protected]"
<[email protected]> ha scritto:
Hi all,
i would like to delete the features in a shapefiles that haven't a specific
field value. See below:
provider = layer.dataProvider()
feat = QgsFeature()
allAttrs = provider.attributeIndexes()
provider.select(allAttrs)
caps = layer.dataProvider().capabilities()
fldDesc = provider.fieldNameIndex("values") #values is field
name
while provider.nextFeature( feat ):
id = feat.id()
attrs = feat.attributeMap()
for (k,attr) in attrs.iteritems():
if k == fldDesc:
if attr != 2.5:
layer.dataProvider().deleteFeatures([ id ])
layer.commitChanges()
but it seems doesn't work.
Any suggestion?
Thanks
Francesco
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