def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "file:///file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).filePath(), "/file")
d.setFilePath(os.path.join("C:/", "file"))
self.assertEqual(d.toString(), "file:///C:/file")
# self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), os.path.join('C:/', 'file'))
d.setQuery("SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), "SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), "SELECT * FROM mytable")
q = "SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), q)
s1 = "file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[0].source(), s1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[0].source(), s1)
n1 = "éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[1].name(), n1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[2].reference(), "id0001")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[2].reference(), "id0001"
)
s = "dbname='C:\\tt' table=\"test\" (geometry) sql="
d.addSource("nn", s, "spatialite")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[3].source(), s)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[3].source(), s)
d.setGeometryField("geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(), "geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryField(), "geom")
d.setGeometryWkbType(QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(), QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryWkbType(), QgsWkbTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f[0].type(), f2[0].type())
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())
def test_no_geometry(self):
df = QgsVirtualLayerDefinition()
df.addSource("vtab", os.path.join(self.testDataDir, "france_parts.shp"), "ogr")
df.setGeometryWkbType(QgsWkbTypes.NoGeometry)
l2 = QgsVectorLayer(df.toString(), "vtab2", "virtual", False)
self.assertEqual(l2.isValid(), True)
self.assertEqual(l2.dataProvider().wkbType(), 100) # NoGeometry
def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "file:///file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).filePath(), "/file")
d.setFilePath(os.path.join('C:/', 'file'))
self.assertEqual(d.toString(), "file:///C:/file")
#self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), os.path.join('C:/', 'file'))
d.setQuery("SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), "SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), "SELECT * FROM mytable")
q = "SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), q)
s1 = "file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[0].source(), s1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[0].source(), s1)
n1 = "éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[1].name(), n1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[2].reference(), "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[2].reference(), "id0001")
s = "dbname='C:\\tt' table=\"test\" (geometry) sql="
d.addSource("nn", s, "spatialite")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[3].source(), s)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[3].source(), s)
d.setGeometryField("geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(), "geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryField(), "geom")
d.setGeometryWkbType(QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(), QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryWkbType(), QgsWkbTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f[0].type(), f2[0].type())
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())
def processAlgorithm(self, feedback):
layers = self.getParameterValue(self.INPUT_DATASOURCES)
query = self.getParameterValue(self.INPUT_QUERY)
uid_field = self.getParameterValue(self.INPUT_UID_FIELD)
geometry_field = self.getParameterValue(self.INPUT_GEOMETRY_FIELD)
geometry_type = self.getParameterValue(self.INPUT_GEOMETRY_TYPE)
geometry_crs = self.getParameterValue(self.INPUT_GEOMETRY_CRS)
df = QgsVirtualLayerDefinition()
layerIdx = 1
if layers:
for layerSource in layers.split(';'):
layer = dataobjects.getObjectFromUri(layerSource)
if layer:
df.addSource('input{}'.format(layerIdx), layer.id())
layerIdx += 1
if query == '':
raise GeoAlgorithmExecutionException(
self.tr('Empty SQL. Please enter valid SQL expression and try again.'))
else:
df.setQuery(query)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NullGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs:
crs = QgsCoordinateReferenceSystem(geometry_crs)
if crs.isValid():
df.setGeometrySrid(crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise GeoAlgorithmExecutionException(vLayer.dataProvider().error().message())
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
vLayer.fields().toList(),
# Create a point layer (without any points) if 'no geometry' is chosen
vLayer.wkbType() if geometry_type != 1 else 1,
vLayer.crs())
features = vector.features(vLayer)
total = 100.0 / len(features)
outFeat = QgsFeature()
for current, inFeat in enumerate(features):
outFeat.setAttributes(inFeat.attributes())
if geometry_type != 1:
outFeat.setGeometry(inFeat.geometry())
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, feedback):
layers = self.getParameterValue(self.INPUT_DATASOURCES)
query = self.getParameterValue(self.INPUT_QUERY)
uid_field = self.getParameterValue(self.INPUT_UID_FIELD)
geometry_field = self.getParameterValue(self.INPUT_GEOMETRY_FIELD)
geometry_type = self.getParameterValue(self.INPUT_GEOMETRY_TYPE)
geometry_crs = self.getParameterValue(self.INPUT_GEOMETRY_CRS)
df = QgsVirtualLayerDefinition()
layerIdx = 1
if layers:
for layerSource in layers.split(';'):
layer = dataobjects.getObjectFromUri(layerSource)
if layer:
df.addSource('input{}'.format(layerIdx), layer.id())
layerIdx += 1
if query == '':
raise GeoAlgorithmExecutionException(
self.tr('Empty SQL. Please enter valid SQL expression and try again.'))
else:
df.setQuery(query)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NullGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs:
crs = QgsCoordinateReferenceSystem(geometry_crs)
if crs.isValid():
df.setGeometrySrid(crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise GeoAlgorithmExecutionException(vLayer.dataProvider().error().message())
writer = self.getOutputFromName(self.OUTPUT_LAYER).getVectorWriter(
vLayer.fields().toList(),
# Create a point layer (without any points) if 'no geometry' is chosen
vLayer.wkbType() if geometry_type != 1 else 1,
vLayer.crs())
features = vector.features(vLayer)
total = 100.0 / len(features)
outFeat = QgsFeature()
for current, inFeat in enumerate(features):
outFeat.setAttributes(inFeat.attributes())
if geometry_type != 1:
outFeat.setGeometry(inFeat.geometry())
writer.addFeature(outFeat)
feedback.setProgress(int(current * total))
del writer
def processAlgorithm(self, parameters, context, feedback):
layers = self.parameterAsLayerList(parameters, self.INPUT_DATASOURCES,
context)
query = self.parameterAsString(parameters, self.INPUT_QUERY, context)
uid_field = self.parameterAsString(parameters, self.INPUT_UID_FIELD,
context)
geometry_field = self.parameterAsString(parameters,
self.INPUT_GEOMETRY_FIELD,
context)
geometry_type = self.parameterAsEnum(parameters,
self.INPUT_GEOMETRY_TYPE, context)
geometry_crs = self.parameterAsCrs(parameters, self.INPUT_GEOMETRY_CRS,
context)
df = QgsVirtualLayerDefinition()
for layerIdx, layer in enumerate(layers):
df.addSource('input{}'.format(layerIdx + 1), layer.id())
if query == '':
raise QgsProcessingException(
self.
tr('Empty SQL. Please enter valid SQL expression and try again.'
))
else:
df.setQuery(query)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NullGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs.isValid():
df.setGeometrySrid(geometry_crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise QgsProcessingException(
vLayer.dataProvider().error().message())
(sink, dest_id) = self.parameterAsSink(
parameters, self.OUTPUT, context, vLayer.fields(),
vLayer.wkbType() if geometry_type != 1 else 1, vLayer.crs())
features = vLayer.getFeatures()
total = 100.0 / vLayer.featureCount() if vLayer.featureCount() else 0
for current, inFeat in enumerate(features):
if feedback.isCanceled():
break
sink.addFeature(inFeat, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def test_no_geometry(self):
df = QgsVirtualLayerDefinition()
df.addSource("vtab", os.path.join(self.testDataDir,
"france_parts.shp"), "ogr")
df.setGeometryWkbType(QgsWkbTypes.NoGeometry)
l2 = QgsVectorLayer(df.toString(), "vtab2", "virtual",
QgsVectorLayer.LayerOptions(False))
self.assertEqual(l2.isValid(), True)
self.assertEqual(l2.dataProvider().wkbType(), 100) # NoGeometry
def processAlgorithm(self, parameters, context, feedback):
layers = self.parameterAsLayerList(parameters, self.INPUT_DATASOURCES, context)
query = self.parameterAsString(parameters, self.INPUT_QUERY, context)
uid_field = self.parameterAsString(parameters, self.INPUT_UID_FIELD, context)
geometry_field = self.parameterAsString(parameters, self.INPUT_GEOMETRY_FIELD, context)
geometry_type = self.parameterAsEnum(parameters, self.INPUT_GEOMETRY_TYPE, context)
geometry_crs = self.parameterAsCrs(parameters, self.INPUT_GEOMETRY_CRS, context)
df = QgsVirtualLayerDefinition()
for layerIdx, layer in enumerate(layers):
df.addSource('input{}'.format(layerIdx + 1), layer.id())
if query == '':
raise QgsProcessingException(
self.tr('Empty SQL. Please enter valid SQL expression and try again.'))
else:
localContext = self.createExpressionContext(parameters, context)
expandedQuery = QgsExpression.replaceExpressionText(query, localContext)
df.setQuery(expandedQuery)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NoGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs.isValid():
df.setGeometrySrid(geometry_crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise QgsProcessingException(vLayer.dataProvider().error().message())
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
vLayer.fields(), vLayer.wkbType() if geometry_type != 1 else 1, vLayer.crs())
if sink is None:
raise QgsProcessingException(self.invalidSinkError(parameters, self.OUTPUT))
features = vLayer.getFeatures()
total = 100.0 / vLayer.featureCount() if vLayer.featureCount() else 0
for current, inFeat in enumerate(features):
if feedback.isCanceled():
break
sink.addFeature(inFeat, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "/file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
d.setFilePath("C:\\file")
self.assertEqual(d.toString(), "C:%5Cfile")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "C:\\file")
d.setQuery("SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), "SELECT * FROM mytable")
q = u"SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
s1 = u"file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[0].source(), s1)
n1 = u"éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[2].reference(), "id0001")
d.setGeometryField("geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(), "geom")
d.setGeometryWkbType(QgsWKBTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(), QgsWKBTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f[0].type(), f2[0].type())
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())
def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "file:///file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).filePath(), "/file")
d.setFilePath(os.path.join('C:/', 'file'))
self.assertEqual(d.toString(), "file:///C:/file")
# self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), os.path.join('C:/', 'file'))
d.setQuery("SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), "SELECT * FROM mytable")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), "SELECT * FROM mytable")
q = "SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).query(), q)
s1 = "file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[0].source(), s1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[0].source(), s1)
n1 = "éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[1].name(), n1)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[2].reference(), "id0001")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[2].reference(), "id0001")
s = "dbname='C:\\tt' table=\"test\" (geometry) sql="
d.addSource("nn", s, "spatialite")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).sourceLayers()[3].source(), s)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).sourceLayers()[3].source(), s)
d.setGeometryField("geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(), "geom")
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryField(), "geom")
d.setGeometryWkbType(QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(), QgsWkbTypes.Point)
self.assertEqual(QgsVirtualLayerDefinition.fromUrl(strToUrl(d.toString())).geometryWkbType(), QgsWkbTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f2[0].type(), QVariant.LongLong)
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())
# Issue https://github.com/qgis/QGIS/issues/44130
url = QUrl(r"?layer_ref=Reprojet%C3%A9_e888ce1e_17a9_46f4_b8c3_254eef3f2931:input1&query=SELECT%20*%20FROM%20input1")
f3 = QgsVirtualLayerDefinition.fromUrl(url)
self.assertEqual(f3.query(), 'SELECT * FROM input1')
source_layer = f3.sourceLayers()[0]
self.assertEqual(source_layer.reference(), 'Reprojeté_e888ce1e_17a9_46f4_b8c3_254eef3f2931')
def test1(self):
d = QgsVirtualLayerDefinition()
self.assertEqual(d.toString(), "")
d.setFilePath("/file")
self.assertEqual(d.toString(), "/file")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(), "/file")
d.setFilePath("C:\\file")
self.assertEqual(d.toString(), "C:%5Cfile")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).filePath(),
"C:\\file")
d.setQuery("SELECT * FROM mytable")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(),
"SELECT * FROM mytable")
q = u"SELECT * FROM tableéé /*:int*/"
d.setQuery(q)
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).query(), q)
s1 = u"file://foo&bar=okié"
d.addSource("name", s1, "provider", "utf8")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(
d.toUrl()).sourceLayers()[0].source(), s1)
n1 = u"éé ok"
d.addSource(n1, s1, "provider")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(
d.toUrl()).sourceLayers()[1].name(), n1)
d.addSource("ref1", "id0001")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(
d.toUrl()).sourceLayers()[2].reference(), "id0001")
d.setGeometryField("geom")
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryField(),
"geom")
d.setGeometryWkbType(QgsWKBTypes.Point)
self.assertEqual(
QgsVirtualLayerDefinition.fromUrl(d.toUrl()).geometryWkbType(),
QgsWKBTypes.Point)
f = QgsFields()
f.append(QgsField("a", QVariant.Int))
f.append(QgsField("f", QVariant.Double))
f.append(QgsField("s", QVariant.String))
d.setFields(f)
f2 = QgsVirtualLayerDefinition.fromUrl(d.toUrl()).fields()
self.assertEqual(f[0].name(), f2[0].name())
self.assertEqual(f[0].type(), f2[0].type())
self.assertEqual(f[1].name(), f2[1].name())
self.assertEqual(f[1].type(), f2[1].type())
self.assertEqual(f[2].name(), f2[2].name())
self.assertEqual(f[2].type(), f2[2].type())
def processAlgorithm(self, parameters, context, feedback):
layers = self.parameterAsLayerList(parameters, self.INPUT_DATASOURCES,
context)
query = self.parameterAsString(parameters, self.INPUT_QUERY, context)
uid_field = self.parameterAsString(parameters, self.INPUT_UID_FIELD,
context)
geometry_field = self.parameterAsString(parameters,
self.INPUT_GEOMETRY_FIELD,
context)
geometry_type = self.parameterAsEnum(parameters,
self.INPUT_GEOMETRY_TYPE, context)
geometry_crs = self.parameterAsCrs(parameters, self.INPUT_GEOMETRY_CRS,
context)
df = QgsVirtualLayerDefinition()
for layerIdx, layer in enumerate(layers):
# Issue https://github.com/qgis/QGIS/issues/24041
# When using this algorithm from the graphic modeler, it may try to
# access (thanks the QgsVirtualLayerProvider) to memory layer that
# belongs to temporary QgsMapLayerStore, not project.
# So, we write them to disk is this is the case.
if context.project() and not context.project().mapLayer(
layer.id()):
basename = "memorylayer." + QgsVectorFileWriter.supportedFormatExtensions(
)[0]
tmp_path = QgsProcessingUtils.generateTempFilename(basename)
QgsVectorFileWriter.writeAsVectorFormat(
layer, tmp_path,
layer.dataProvider().encoding())
df.addSource('input{}'.format(layerIdx + 1), tmp_path, "ogr")
else:
df.addSource('input{}'.format(layerIdx + 1), layer.id())
if query == '':
raise QgsProcessingException(
self.
tr('Empty SQL. Please enter valid SQL expression and try again.'
))
localContext = self.createExpressionContext(parameters, context)
expandedQuery = QgsExpression.replaceExpressionText(
query, localContext)
df.setQuery(expandedQuery)
if uid_field:
df.setUid(uid_field)
if geometry_type == 1: # no geometry
df.setGeometryWkbType(QgsWkbTypes.NoGeometry)
else:
if geometry_field:
df.setGeometryField(geometry_field)
if geometry_type > 1:
df.setGeometryWkbType(geometry_type - 1)
if geometry_crs.isValid():
df.setGeometrySrid(geometry_crs.postgisSrid())
vLayer = QgsVectorLayer(df.toString(), "temp_vlayer", "virtual")
if not vLayer.isValid():
raise QgsProcessingException(
vLayer.dataProvider().error().message())
if vLayer.wkbType() == QgsWkbTypes.Unknown:
raise QgsProcessingException(self.tr("Cannot find geometry field"))
(sink, dest_id) = self.parameterAsSink(
parameters, self.OUTPUT, context, vLayer.fields(),
vLayer.wkbType() if geometry_type != 1 else 1, vLayer.crs())
if sink is None:
raise QgsProcessingException(
self.invalidSinkError(parameters, self.OUTPUT))
features = vLayer.getFeatures()
total = 100.0 / vLayer.featureCount() if vLayer.featureCount() else 0
for current, inFeat in enumerate(features):
if feedback.isCanceled():
break
sink.addFeature(inFeat, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}
