Hello, isnt it "QgsEditError" instead of "QgsEditException"?
regards, Thomas Am Do., 14. Juni 2018 um 03:26 Uhr schrieb Zhang Qun <zhangq....@gmail.com>: > Hi Matthias > > I follow the steps in the link you posted and get the following errors > when trying to import > > ImportError: cannot import name QgsEditException > > Do I have to install some modules? Didn't find any luck on google. > > Best regards, > Zhang Qun > > On Wed, Jun 13, 2018 at 6:16 PM, Matthias Kuhn <matth...@opengis.ch> > wrote: > >> Glad you like it :) >> >> Forwading this answer also to the mailing list for future reference, >> Ethan, you need to use "reply to all" in your mail application or other >> are not able to follow our conversation (which would be a pity ;) ). >> >> Best regards >> Matthias >> >> On 06/13/2018 12:13 PM, Zhang Qun wrote: >> > Wow, i was about to look into the with() statement. It looks much >> > better. Many thanks for the link. >> > >> > Regards, >> > Ethan >> > >> > >> > On Wed, Jun 13, 2018, 6:03 PM Matthias Kuhn <matth...@opengis.ch >> > <mailto:matth...@opengis.ch>> wrote: >> > >> > Hi Ethan, >> > >> > there are of course advantages and disadvantages of both methods, >> but in >> > most cases the QgsVectorLayer ones just "do the right thing", >> especially >> > when used with a `with` block, see also this post: >> > >> > http://www.opengis.ch/2015/08/12/with-edit-layer/ >> > >> > Cheers >> > Matthias >> > >> > On 06/13/2018 11:59 AM, Zhang Qun wrote: >> > > Hi Matthias, >> > > >> > > Thanks very much for the instruction. I will try it out. The >> > > dataProvider method seems simpler to me and it can set attributes >> in >> > > batch as it takes a list as input. The layer method seems only >> > takes one >> > > input. If i want to change 10 attributes of a feature, i have to >> issue >> > > 10 commands. >> > > >> > > Best regards, >> > > Ethan >> > > >> > > >> > > On Wed, Jun 13, 2018, 5:45 PM Matthias Kuhn <matth...@opengis.ch >> > <mailto:matth...@opengis.ch> >> > > <mailto:matth...@opengis.ch <mailto:matth...@opengis.ch>>> wrote: >> > > >> > > Hi Ethan >> > > >> > > On 06/13/2018 11:18 AM, Zhang Qun wrote: >> > > > Hi everyone, i"m using QGIS2.18, and trying to change >> feature >> > > attributes >> > > > using the following two methods: >> > > > >> > > > *dataProvider:* >> > > > >> > > > |attrs >> > > >> ={0:"hello",1:123}layer.dataProvider().changeAttributeValues({fid >> > > > :attrs })| >> > > > >> > > > *layer object:* >> > > > >> > > > >> > > >> > >> >> |layer.startEditing()layer.changeAttributeValue(fid,fieldIndex,value)layer.commitChanges()| >> > > > >> > > > I keep the attribute table open, and monitor the changes. >> > The first >> > > > method dataProvider is not able to update the attribute >> > table on the >> > > > fly, even the "reload table" button on the top menu of the >> > table does >> > > > not work. I have to re-open the table to see the changes. >> > The second >> > > > method is working, the attribute table gets instantly >> updated. >> > > > >> > > > I would like to stay with the dataProvider method but not >> > sure how to >> > > > get instantly updated attribute table? >> > > >> > > The provider's dataChanged() signal needs to be emitted, I >> > think you can >> > > directly emit that or call `dataProvider().forceReload()`. >> > > >> > > Out of curiosity, why would you like to stay with the >> > dataProvider >> > > method? >> > > >> > > Bests >> > > Matthias >> > > >> > > >> > > > >> > > > Thanks. >> > > > >> > > > Best regards, >> > > > Ethan >> > > > >> > > > >> > > > _______________________________________________ >> > > > QGIS-Developer mailing list >> > > > QGIS-Developer@lists.osgeo.org >> > <mailto:QGIS-Developer@lists.osgeo.org> >> > <mailto:QGIS-Developer@lists.osgeo.org >> > <mailto:QGIS-Developer@lists.osgeo.org>> >> > > > List info: >> > https://lists.osgeo.org/mailman/listinfo/qgis-developer >> > > > Unsubscribe: >> > https://lists.osgeo.org/mailman/listinfo/qgis-developer >> > > > >> > > _______________________________________________ >> > > QGIS-Developer mailing list >> > > QGIS-Developer@lists.osgeo.org >> > <mailto:QGIS-Developer@lists.osgeo.org> >> > <mailto:QGIS-Developer@lists.osgeo.org >> > <mailto:QGIS-Developer@lists.osgeo.org>> >> > > List info: >> https://lists.osgeo.org/mailman/listinfo/qgis-developer >> > > Unsubscribe: >> > https://lists.osgeo.org/mailman/listinfo/qgis-developer >> > > >> > >> > > _______________________________________________ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
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