Python QgsFeature.setAttributes方法代码示例

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def testGeopackageLargeFID(self):

        tmpfile = os.path.join(self.basetestpath, 'testGeopackageLargeFID.gpkg')
        ds = ogr.GetDriverByName('GPKG').CreateDataSource(tmpfile)
        lyr = ds.CreateLayer('test', geom_type=ogr.wkbPoint)
        lyr.CreateField(ogr.FieldDefn('str_field', ogr.OFTString))
        ds = None

        vl = QgsVectorLayer(u'{}'.format(tmpfile) + "|layername=" + "test", 'test', u'ogr')
        f = QgsFeature()
        f.setAttributes([1234567890123, None])
        self.assertTrue(vl.startEditing())
        self.assertTrue(vl.dataProvider().addFeatures([f]))
        self.assertTrue(vl.commitChanges())

        got = [feat for feat in vl.getFeatures()][0]
        self.assertEqual(got['fid'], 1234567890123)

        self.assertTrue(vl.startEditing())
        self.assertTrue(vl.changeGeometry(1234567890123, QgsGeometry.fromWkt('Point (3 50)')))
        self.assertTrue(vl.changeAttributeValue(1234567890123, 1, 'foo'))
        self.assertTrue(vl.commitChanges())

        got = [feat for feat in vl.getFeatures()][0]
        self.assertEqual(got['str_field'], 'foo')
        got_geom = got.geometry()
        self.assertIsNotNone(got_geom)

        self.assertTrue(vl.startEditing())
        self.assertTrue(vl.deleteFeature(1234567890123))
        self.assertTrue(vl.commitChanges())

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def layerExtent(self, layer, writer, progress):
        rect = layer.extent()
        minx = rect.xMinimum()
        miny = rect.yMinimum()
        maxx = rect.xMaximum()
        maxy = rect.yMaximum()
        height = rect.height()
        width = rect.width()
        cntx = minx + width / 2.0
        cnty = miny + height / 2.0
        area = width * height
        perim = 2 * width + 2 * height

        rect = [QgsPoint(minx, miny), QgsPoint(minx, maxy), QgsPoint(maxx,
                maxy), QgsPoint(maxx, miny), QgsPoint(minx, miny)]
        geometry = QgsGeometry().fromPolygon([rect])
        feat = QgsFeature()
        feat.setGeometry(geometry)
        attrs = [
            minx,
            miny,
            maxx,
            maxy,
            cntx,
            cnty,
            area,
            perim,
            height,
            width,
        ]
        feat.setAttributes(attrs)
        writer.addFeature(feat)

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def testAddMultipleFeatures(self):
        # test adding multiple features to an edit buffer
        layer = createEmptyLayer()
        self.assertTrue(layer.startEditing())

        self.assertEqual(layer.editBuffer().addedFeatures(), {})
        self.assertFalse(layer.editBuffer().isFeatureAdded(1))
        self.assertFalse(layer.editBuffer().isFeatureAdded(3))

        # add two features
        f1 = QgsFeature(layer.fields(), 1)
        f1.setGeometry(QgsGeometry.fromPoint(QgsPointXY(1, 2)))
        f1.setAttributes(["test", 123])
        f2 = QgsFeature(layer.fields(), 2)
        f2.setGeometry(QgsGeometry.fromPoint(QgsPointXY(2, 4)))
        f2.setAttributes(["test2", 246])

        self.assertTrue(layer.addFeatures([f1, f2]))

        # test contents of buffer
        added = layer.editBuffer().addedFeatures()
        new_feature_ids = list(added.keys())
        self.assertEqual(added[new_feature_ids[0]]['fldtxt'], 'test2')
        self.assertEqual(added[new_feature_ids[0]]['fldint'], 246)
        self.assertEqual(added[new_feature_ids[1]]['fldtxt'], 'test')
        self.assertEqual(added[new_feature_ids[1]]['fldint'], 123)

        self.assertTrue(layer.editBuffer().isFeatureAdded(new_feature_ids[0]))
        self.assertTrue(layer.editBuffer().isFeatureAdded(new_feature_ids[1]))

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def testFilter(self):
        """ test calculating aggregate with filter """

        layer = QgsVectorLayer("Point?field=fldint:integer", "layer", "memory")
        pr = layer.dataProvider()

        int_values = [4, 2, 3, 2, 5, None, 8]

        features = []
        for v in int_values:
            f = QgsFeature()
            f.setFields(layer.fields())
            f.setAttributes([v])
            features.append(f)
        assert pr.addFeatures(features)

        agg = QgsAggregateCalculator(layer)

        filter_string = "fldint > 2"
        agg.setFilter(filter_string)
        self.assertEqual(agg.filter(), filter_string)

        val, ok = agg.calculate(QgsAggregateCalculator.Sum, 'fldint')
        self.assertTrue(ok)
        self.assertEqual(val, 20)

        # remove filter and retest
        agg.setFilter(None)
        val, ok = agg.calculate(QgsAggregateCalculator.Sum, 'fldint')
        self.assertTrue(ok)
        self.assertEqual(val, 24)

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def processAlgorithm(self, progress):
        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))

        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
            layer.fields().toList(), QgsWkbTypes.Polygon, layer.crs()
        )

        outFeat = QgsFeature()
        features = vector.features(layer)
        total = 100.0 / len(features)
        for current, f in enumerate(features):
            outGeomList = []
            if f.geometry().isMultipart():
                outGeomList = f.geometry().asMultiPolyline()
            else:
                outGeomList.append(f.geometry().asPolyline())

            polyGeom = self.removeBadLines(outGeomList)
            if len(polyGeom) != 0:
                outFeat.setGeometry(QgsGeometry.fromPolygon(polyGeom))
                attrs = f.attributes()
                outFeat.setAttributes(attrs)
                writer.addFeature(outFeat)

            progress.setPercentage(int(current * total))

        del writer

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def processAlgorithm(self, progress):
        fieldType = self.getParameterValue(self.FIELD_TYPE)
        fieldName = self.getParameterValue(self.FIELD_NAME)
        fieldLength = self.getParameterValue(self.FIELD_LENGTH)
        fieldPrecision = self.getParameterValue(self.FIELD_PRECISION)
        output = self.getOutputFromName(self.OUTPUT_LAYER)

        layer = dataobjects.getObjectFromUri(
            self.getParameterValue(self.INPUT_LAYER))

        fields = layer.fields()
        fields.append(QgsField(fieldName, self.TYPES[fieldType], '',
                               fieldLength, fieldPrecision))
        writer = output.getVectorWriter(fields, layer.wkbType(),
                                        layer.crs())
        outFeat = QgsFeature()
        features = vector.features(layer)
        total = 100.0 / len(features)
        for current, feat in enumerate(features):
            progress.setPercentage(int(current * total))
            geom = feat.geometry()
            outFeat.setGeometry(geom)
            atMap = feat.attributes()
            atMap.append(None)
            outFeat.setAttributes(atMap)
            writer.addFeature(outFeat)
        del writer

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def processAlgorithm(self, progress):
        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
        interval = self.getParameterValue(self.INTERVAL)

        isPolygon = layer.geometryType() == QgsWkbTypes.PolygonGeometry

        writer = self.getOutputFromName(
            self.OUTPUT).getVectorWriter(layer.fields().toList(),
                                         layer.wkbType(), layer.crs())

        features = vector.features(layer)
        total = 100.0 / len(features)
        for current, f in enumerate(features):
            featGeometry = f.geometry()
            attrs = f.attributes()
            newGeometry = self.densifyGeometry(featGeometry, interval,
                                               isPolygon)
            feature = QgsFeature()
            feature.setGeometry(newGeometry)
            feature.setAttributes(attrs)
            writer.addFeature(feature)

            progress.setPercentage(int(current * total))

        del writer

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def processAlgorithm(self, progress):
        layer = dataobjects.getObjectFromUri(
            self.getParameterValue(self.INPUT))
        idx = layer.fieldNameIndex(self.getParameterValue(self.COLUMN))

        fields = layer.pendingFields()
        fields.remove(idx)

        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(fields,
            layer.wkbType(), layer.crs())

        features = vector.features(layer)
        count = len(features)
        total = 100.0 / float(count)

        feat = QgsFeature()
        for count, f in enumerate(features):
            feat.setGeometry(f.geometry())
            attributes = f.attributes()
            del attributes[idx]
            feat.setAttributes(attributes)
            writer.addFeature(feat)

            progress.setPercentage(int(count * total))

        del writer

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def testInsertPolygonInMultiPolygon(self):
        layer = QgsVectorLayer("MultiPolygon?crs=epsg:4326&field=id:integer", "addfeat", "memory")
        pr = layer.dataProvider()
        f = QgsFeature()
        f.setAttributes([1])
        f.setGeometry(QgsGeometry.fromWkt('MultiPolygon(((0 0, 1 0, 1 1, 0 1, 0 0)),((10 0, 11 0, 11 1, 10 1, 10 0)))'))
        pr.addFeatures([f])

        uri = '{} table="qgis_test"."new_table_multipolygon" sql='.format(self.dbconn)
        error, message = QgsVectorLayerExporter.exportLayer(layer, uri, 'mssql', QgsCoordinateReferenceSystem('EPSG:4326'))
        self.assertEqual(error, QgsVectorLayerExporter.NoError)

        new_layer = QgsVectorLayer(uri, 'new', 'mssql')
        self.assertTrue(new_layer.isValid())
        self.assertEqual(new_layer.wkbType(), QgsWkbTypes.MultiPolygon)
        geom = [f.geometry().asWkt() for f in new_layer.getFeatures()]
        self.assertEqual(geom, ['MultiPolygon (((0 0, 1 0, 1 1, 0 1, 0 0)),((10 0, 11 0, 11 1, 10 1, 10 0)))'])

        # add single part
        f2 = QgsFeature()
        f2.setAttributes([2])
        f2.setGeometry(QgsGeometry.fromWkt('Polygon((30 0, 31 0, 31 1, 30 1, 30 0))'))
        self.assertTrue(new_layer.dataProvider().addFeatures([f2]))

        # should become multipart
        geom = [f.geometry().asWkt() for f in new_layer.getFeatures()]
        self.assertEqual(geom, ['MultiPolygon (((0 0, 1 0, 1 1, 0 1, 0 0)),((10 0, 11 0, 11 1, 10 1, 10 0)))', 'MultiPolygon (((30 0, 31 0, 31 1, 30 1, 30 0)))'])

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def getSource(self):
        # create temporary table for edit tests
        self.execSQLCommand('DROP TABLE IF EXISTS qgis_test.edit_data')
        self.execSQLCommand(
            """CREATE TABLE qgis_test.edit_data (pk INTEGER PRIMARY KEY,cnt integer, name nvarchar(max), name2 nvarchar(max), num_char nvarchar(max), geom geometry)""")

        vl = QgsVectorLayer(
            self.dbconn + ' sslmode=disable key=\'pk\' srid=4326 type=POINT table="qgis_test"."edit_data" (geom) sql=',
            'test', 'mssql')

        self.assertTrue(vl.isValid(), vl.dataProvider().error().message())

        f1 = QgsFeature()
        f1.setAttributes([5, -200, NULL, 'NuLl', '5'])
        f1.setGeometry(QgsGeometry.fromWkt('Point (-71.123 78.23)'))

        f2 = QgsFeature()
        f2.setAttributes([3, 300, 'Pear', 'PEaR', '3'])

        f3 = QgsFeature()
        f3.setAttributes([1, 100, 'Orange', 'oranGe', '1'])
        f3.setGeometry(QgsGeometry.fromWkt('Point (-70.332 66.33)'))

        f4 = QgsFeature()
        f4.setAttributes([2, 200, 'Apple', 'Apple', '2'])
        f4.setGeometry(QgsGeometry.fromWkt('Point (-68.2 70.8)'))

        f5 = QgsFeature()
        f5.setAttributes([4, 400, 'Honey', 'Honey', '4'])
        f5.setGeometry(QgsGeometry.fromWkt('Point (-65.32 78.3)'))

        self.assertTrue(vl.dataProvider().addFeatures([f1, f2, f3, f4, f5]))

        return vl

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def test_check_validity(self):
        """Test that the output invalid contains the error reason"""

        polygon_layer = self._make_layer('Polygon')
        self.assertTrue(polygon_layer.startEditing())
        f = QgsFeature(polygon_layer.fields())
        f.setAttributes([1])
        # Flake!
        f.setGeometry(QgsGeometry.fromWkt(
            'POLYGON ((0 0, 2 2, 0 2, 2 0, 0 0))'))
        self.assertTrue(f.isValid())
        f2 = QgsFeature(polygon_layer.fields())
        f2.setAttributes([1])
        f2.setGeometry(QgsGeometry.fromWkt(
            'POLYGON((1.1 1.1, 1.1 2.1, 2.1 2.1, 2.1 1.1, 1.1 1.1))'))
        self.assertTrue(f2.isValid())
        self.assertTrue(polygon_layer.addFeatures([f, f2]))
        polygon_layer.commitChanges()
        polygon_layer.rollBack()
        self.assertEqual(polygon_layer.featureCount(), 2)

        QgsProject.instance().addMapLayers([polygon_layer])

        alg = self.registry.createAlgorithmById('qgis:checkvalidity')

        context = QgsProcessingContext()
        context.setProject(QgsProject.instance())
        feedback = ConsoleFeedBack()

        self.assertIsNotNone(alg)
        parameters = {}
        parameters['INPUT_LAYER'] = polygon_layer.id()
        parameters['VALID_OUTPUT'] = 'memory:'
        parameters['INVALID_OUTPUT'] = 'memory:'
        parameters['ERROR_OUTPUT'] = 'memory:'

        # QGIS method
        parameters['METHOD'] = 1
        ok, results = execute(
            alg, parameters, context=context, feedback=feedback)
        self.assertTrue(ok)
        invalid_layer = QgsProcessingUtils.mapLayerFromString(
            results['INVALID_OUTPUT'], context)
        self.assertEqual(invalid_layer.fields().names()[-1], '_errors')
        self.assertEqual(invalid_layer.featureCount(), 1)
        f = next(invalid_layer.getFeatures())
        self.assertEqual(f.attributes(), [
                         1, 'segments 0 and 2 of line 0 intersect at 1, 1'])

        # GEOS method
        parameters['METHOD'] = 2
        ok, results = execute(
            alg, parameters, context=context, feedback=feedback)
        self.assertTrue(ok)
        invalid_layer = QgsProcessingUtils.mapLayerFromString(
            results['INVALID_OUTPUT'], context)
        self.assertEqual(invalid_layer.fields().names()[-1], '_errors')
        self.assertEqual(invalid_layer.featureCount(), 1)
        f = next(invalid_layer.getFeatures())
        self.assertEqual(f.attributes(), [1, 'Self-intersection'])

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def addFeatures(self, flist, flags=None):
        added = False
        f_added = []
        for f in flist:
            if f.hasGeometry() and (f.geometry().wkbType() != self.wkbType()):
                return added, f_added

        for f in flist:
            _f = QgsFeature(self.fields())
            _f.setGeometry(f.geometry())
            attrs = [None for i in range(_f.fields().count())]
            for i in range(min(len(attrs), len(f.attributes()))):
                attrs[i] = f.attributes()[i]
            _f.setAttributes(attrs)
            _f.setId(self.next_feature_id)
            self._features[self.next_feature_id] = _f
            self.next_feature_id += 1
            added = True
            f_added.append(_f)

            if self._spatialindex is not None:
                self._spatialindex.insertFeature(_f)

        if len(f_added):
            self.clearMinMaxCache()
            self.updateExtents()

        return added, f_added

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def layerOmmb(self, layer, writer, progress):
        current = 0

        fit = layer.getFeatures()
        inFeat = QgsFeature()
        total = 100.0 / layer.featureCount()
        newgeometry = QgsGeometry()
        first = True
        while fit.nextFeature(inFeat):
            if first:
                newgeometry = inFeat.geometry()
                first = False
            else:
                newgeometry = newgeometry.combine(inFeat.geometry())
            current += 1
            progress.setPercentage(int(current * total))

        geometry, area, perim, angle, width, height = self.OMBBox(newgeometry)

        if geometry:
            outFeat = QgsFeature()

            outFeat.setGeometry(geometry)
            outFeat.setAttributes([area,
                                   perim,
                                   angle,
                                   width,
                                   height])
            writer.addFeature(outFeat)

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def testWriteWithBinaryField(self):
        """
        Test writing with a binary field
        :return:
        """
        basetestpath = tempfile.mkdtemp()

        tmpfile = os.path.join(basetestpath, 'binaryfield.sqlite')
        ds = ogr.GetDriverByName('SQLite').CreateDataSource(tmpfile)
        lyr = ds.CreateLayer('test', geom_type=ogr.wkbPoint, options=['FID=fid'])
        lyr.CreateField(ogr.FieldDefn('strfield', ogr.OFTString))
        lyr.CreateField(ogr.FieldDefn('intfield', ogr.OFTInteger))
        lyr.CreateField(ogr.FieldDefn('binfield', ogr.OFTBinary))
        lyr.CreateField(ogr.FieldDefn('binfield2', ogr.OFTBinary))
        f = None
        ds = None

        vl = QgsVectorLayer(tmpfile)
        self.assertTrue(vl.isValid())

        # check that 1 of its fields is a bool
        fields = vl.fields()
        self.assertEqual(fields.at(fields.indexFromName('binfield')).type(), QVariant.ByteArray)

        dp = vl.dataProvider()
        f = QgsFeature(fields)
        bin_1 = b'xxx'
        bin_2 = b'yyy'
        bin_val1 = QByteArray(bin_1)
        bin_val2 = QByteArray(bin_2)
        f.setAttributes([1, 'str', 100, bin_val1, bin_val2])
        self.assertTrue(dp.addFeature(f))

        # write a gpkg package with a binary field
        filename = os.path.join(str(QDir.tempPath()), 'with_bin_field')
        rc, errmsg = QgsVectorFileWriter.writeAsVectorFormat(vl,
                                                             filename,
                                                             'utf-8',
                                                             vl.crs(),
                                                             'GPKG')

        self.assertEqual(rc, QgsVectorFileWriter.NoError)

        # open the resulting geopackage
        vl = QgsVectorLayer(filename + '.gpkg', '', 'ogr')
        self.assertTrue(vl.isValid())
        fields = vl.fields()

        # test type of converted field
        idx = fields.indexFromName('binfield')
        self.assertEqual(fields.at(idx).type(), QVariant.ByteArray)
        idx2 = fields.indexFromName('binfield2')
        self.assertEqual(fields.at(idx2).type(), QVariant.ByteArray)

        # test values
        self.assertEqual(vl.getFeature(1).attributes()[idx], bin_val1)
        self.assertEqual(vl.getFeature(1).attributes()[idx2], bin_val2)

        del vl
        os.unlink(filename + '.gpkg')

# 需要导入模块: from qgis.core import QgsFeature [as 别名]
# 或者: from qgis.core.QgsFeature import setAttributes [as 别名]
    def processAlgorithm(self, progress):
        layer = dataobjects.getObjectFromUri(self.getParameterValue(self.INPUT))
        crsId = self.getParameterValue(self.TARGET_CRS)
        targetCrs = QgsCoordinateReferenceSystem()
        targetCrs.createFromUserInput(crsId)

        writer = self.getOutputFromName(self.OUTPUT).getVectorWriter(
            layer.fields().toList(), layer.wkbType(), targetCrs)

        layerCrs = layer.crs()
        crsTransform = QgsCoordinateTransform(layerCrs, targetCrs)

        outFeat = QgsFeature()
        features = vector.features(layer)
        total = 100.0 / len(features)
        for current, f in enumerate(features):
            geom = f.geometry()
            geom.transform(crsTransform)
            outFeat.setGeometry(geom)
            outFeat.setAttributes(f.attributes())
            writer.addFeature(outFeat)

            progress.setPercentage(int(current * total))

        del writer

        self.crs = targetCrs