Bug report #9138: QgsGeometry.convertToMultiType() fails - QGIS Application - QGIS Issue Tracking

Bug report #9138

QgsGeometry.convertToMultiType() fails

Added by Paolo Corti over 10 years ago. Updated over 10 years ago.

Status:	Closed
Priority:	Normal
Assignee:	Marco Hugentobler
Category:	Vectors
Affected QGIS version:	2.0.1	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:
Crashes QGIS or corrupts data:	No	Copied to github as #:	17773

Description

I have a strange behavior with the QgsGeometry.convertToMultiType()
method here: it looks like the method is always failing the first
time, but getting success the second time is run:

In [1]: from qgis.core import *

In [2]: wkt = 'POLYGON((2283519.55884151300415397
4679066.13715541176497936,2283544.75336170010268688
4679033.60118563380092382,2283525.45749358925968409
4679011.69776777736842632,2283506.92586500011384487
4679037.65943400003015995,2283487.47002476220950484
4679065.54728745669126511,2283519.55884151300415397
4679066.13715541176497936))'

In [3]: polygon = QgsGeometry.fromWkt(wkt)

In [4]: polygon.convertToMultiType()
Out⁴: False

In [5]: print polygon.exportToWkt()
POLYGON((2283519.55884151300415397
4679066.13715541176497936,2283544.75336170010268688
4679033.60118563380092382,2283525.45749358925968409
4679011.69776777736842632,2283506.92586500011384487
4679037.65943400003015995,2283487.47002476220950484
4679065.54728745669126511,2283519.55884151300415397
4679066.13715541176497936))

In [6]: polygon.convertToMultiType()
Out⁶: True

In [7]: print polygon.exportToWkt()
MULTIPOLYGON(((2283519.55884151300415397
4679066.13715541176497936,2283544.75336170010268688
4679033.60118563380092382,2283525.45749358925968409
4679011.69776777736842632,2283506.92586500011384487
4679037.65943400003015995,2283487.47002476220950484
4679065.54728745669126511,2283519.55884151300415397
4679066.13715541176497936)))