def modelFromFile(filepath):
"""
Initiates a model from a filepath.
:param filepath: (str) filepath for target file.
:return: (QgsProcessingModelAlgorithm) model as a processing algorithm.
"""
alg = QgsProcessingModelAlgorithm()
alg.fromFile(filepath)
alg.initAlgorithm()
return alg
def runModel(self, modelName=None):
"""
Executes chosen model, if possible.
:param modelPath: (str) path to the model to be registered.
"""
if self.modelComboBox.currentIndex() < 1:
return
if not modelName or isinstance(modelName, bool):
modelName = self.model()
modelPath = self.modelPath()
else:
modelPath = os.path.join(self.defaultModelPath(), modelName)
alg = QgsProcessingModelAlgorithm()
if not self.modelExists(modelName):
# if model was manually removed and combo box was not refreshed
self.iface.messageBar().pushMessage(
self.tr('Failed'),
self.tr("model {model} seems to have been deleted.").format(model=modelName),
level=Qgis.Critical,
duration=5
)
return
alg.fromFile(modelPath)
alg.initAlgorithm()
# as this tool assumes that every parameter is pre-set, only output shall
# be passed on - ALL outputs from this tool is set to memory layers.
param = {vl.name() : "memory:" for vl in alg.parameterDefinitions()}
msg = self.tr("Would you like to run {model}").format(model=modelName)
if self.options()["checkBeforeRunModel"] and not self.confirmAction(msg):
return
try:
out = processing.run(alg, param)
self.iface.messageBar().pushMessage(
self.tr('Sucess'),
self.tr("model {model} finished.").format(model=modelName),
level=Qgis.Info,
duration=5
)
QgsMessageLog.logMessage(
self.tr(
"Model {model} finished running with no errors. You may"
" check model output on Processing log tab."
).format(model=modelName),
'DSGTools Plugin',
Qgis.Info
)
if not self.options()["loadModelOutput"]:
return
for var, value in out.items():
if isinstance(value, QgsMapLayer):
value.setName(
"{model} {layername}".format(model=modelName, layername=var)
)
self.addLayerToGroup(
value, "DSGTools Validation Toolbar Output", modelName
)
except Exception as e:
msg = self.tr(
"Unable to run (check Processing tab for details on model "
"execution log) {model}:\n{error}"
).format(model=modelName, error=str(e))
self.iface.messageBar().pushMessage(
self.tr("Model {model} failed").format(model=modelName),
self.tr("check log for more information."),
level=Qgis.Critical,
duration=5
)
QgsMessageLog.logMessage(msg, 'DSGTools Plugin',Qgis.Info)