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[processing] warn user about incorrect input data when calculating

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mean coordinates using weight field (fix #9084)
This commit is contained in:
Alexander Bruy 2017-02-07 16:29:27 +02:00
parent 9bd0d7a7bb
commit 4963548f4d
1 changed files with 5 additions and 0 deletions
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5
python/plugins/processing/algs/qgis/MeanCoords.py
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@ -34,6 +34,7 @@ from qgis.PyQt.QtCore import QVariant
from qgis.core import Qgis, QgsField, QgsFeature, QgsGeometry, QgsPoint, QgsWkbTypes from qgis.core import Qgis, QgsField, QgsFeature, QgsGeometry, QgsPoint, QgsWkbTypes
from processing.core.GeoAlgorithm import GeoAlgorithm from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
from processing.core.parameters import ParameterTableField from processing.core.parameters import ParameterTableField
from processing.core.parameters import ParameterVector from processing.core.parameters import ParameterVector
from processing.core.outputs import OutputVector from processing.core.outputs import OutputVector
@ -110,6 +111,10 @@ class MeanCoords(GeoAlgorithm):
weight = float(feat.attributes()[weightIndex]) weight = float(feat.attributes()[weightIndex])
except: except:
weight = 1.00 weight = 1.00
if weight < 0:
raise GeoAlgorithmExecutionException(self.tr('Negative weight value found. Please fix you data and try again.'))
if clazz not in means: if clazz not in means:
means[clazz] = (0, 0, 0) means[clazz] = (0, 0, 0)