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[processing] Don't force a child algorithm in a model to have all valid values upfront

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This allows defered setting of parameter values, e.g. if you add an algorithm, fill in
half the parameter values, then realise you need to add a new input to the model, you
don't have to lose all your filled in values...
This commit is contained in:
Nyall Dawson 2020-04-14 15:46:38 +10:00
parent 9f7c7fcb35
commit f476fe7fc4
1 changed files with 8 additions and 9 deletions
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17
python/plugins/processing/modeler/ModelerParametersDialog.py
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@ -460,26 +460,25 @@ class ModelerParametersPanelWidget(QgsPanelWidget):
else:
val = wrapper.parameterValue()
except InvalidParameterValue:
self.bar.pushMessage(self.tr("Error"),
self.tr("Wrong or missing value for parameter '{}'").format(param.description()),
level=Qgis.Warning)
return None
val = None
if isinstance(val, QgsProcessingModelChildParameterSource):
val = [val]
elif not (isinstance(val, list) and all(
[isinstance(subval, QgsProcessingModelChildParameterSource) for subval in val])):
val = [QgsProcessingModelChildParameterSource.fromStaticValue(val)]
valid = True
for subval in val:
if (isinstance(subval, QgsProcessingModelChildParameterSource) and
subval.source() == QgsProcessingModelChildParameterSource.StaticValue and
not param.checkValueIsAcceptable(subval.staticValue())) \
or (subval is None and not param.flags() & QgsProcessingParameterDefinition.FlagOptional):
self.bar.pushMessage(self.tr("Error"), self.tr("Wrong or missing value for parameter '{}'").format(
param.description()),
level=Qgis.Warning)
return None
alg.addParameterSources(param.name(), val)
valid = False
break
if valid:
alg.addParameterSources(param.name(), val)
outputs = {}
for output in self._alg.destinationParameterDefinitions():