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[processing] Throw error when attempting to use Distance Matrix with

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multipoint datasets

There's no single approach to use for multi-point inputs, so instead
of overloading this algorithm with extra options to control how these
are handled, we raise a helpful error and push the reponsibility back
to the user to get the data into the right format before running the
tool.

Fixes #20799
This commit is contained in:
Nyall Dawson 2018-12-14 12:36:32 +10:00
parent 1285a01c64
commit 5c2f68e769
1 changed files with 6 additions and 0 deletions
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6
python/plugins/processing/algs/qgis/PointDistance.py
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@ -116,11 +116,17 @@ class PointDistance(QgisAlgorithm):
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
if QgsWkbTypes.isMultiType(source.wkbType()):
raise QgsProcessingException(self.tr('Input point layer is a MultiPoint layer - first convert to single points before using this algorithm.'))
source_field = self.parameterAsString(parameters, self.INPUT_FIELD, context)
target_source = self.parameterAsSource(parameters, self.TARGET, context)
if target_source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.TARGET))
if QgsWkbTypes.isMultiType(target_source.wkbType()):
raise QgsProcessingException(self.tr('Target point layer is a MultiPoint layer - first convert to single points before using this algorithm.'))
target_field = self.parameterAsString(parameters, self.TARGET_FIELD, context)
same_source_and_target = parameters[self.INPUT] == parameters[self.TARGET]
matType = self.parameterAsEnum(parameters, self.MATRIX_TYPE, context)