本文整理汇总了Python中qgis.core.QgsVectorLayerExporter.addFeature方法的典型用法代码示例。如果您正苦于以下问题：Python QgsVectorLayerExporter.addFeature方法的具体用法？Python QgsVectorLayerExporter.addFeature怎么用？Python QgsVectorLayerExporter.addFeature使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.core.QgsVectorLayerExporter的用法示例。
在下文中一共展示了QgsVectorLayerExporter.addFeature方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: processAlgorithm
# 需要导入模块: from qgis.core import QgsVectorLayerExporter [as 别名]
# 或者: from qgis.core.QgsVectorLayerExporter import addFeature [as 别名]
def processAlgorithm(self, parameters, context, feedback):
connection = self.parameterAsString(parameters, self.DATABASE, context)
db = postgis.GeoDB.from_name(connection)
schema = self.parameterAsString(parameters, self.SCHEMA, context)
overwrite = self.parameterAsBoolean(parameters, self.OVERWRITE, context)
createIndex = self.parameterAsBoolean(parameters, self.CREATEINDEX, context)
convertLowerCase = self.parameterAsBoolean(parameters, self.LOWERCASE_NAMES, context)
dropStringLength = self.parameterAsBoolean(parameters, self.DROP_STRING_LENGTH, context)
forceSinglePart = self.parameterAsBoolean(parameters, self.FORCE_SINGLEPART, context)
primaryKeyField = self.parameterAsString(parameters, self.PRIMARY_KEY, context) or 'id'
encoding = self.parameterAsString(parameters, self.ENCODING, context)
source = self.parameterAsSource(parameters, self.INPUT, context)
if source is None:
raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
table = self.parameterAsString(parameters, self.TABLENAME, context)
if table:
table.strip()
if not table or table == '':
table = source.sourceName()
table = table.replace('.', '_')
table = table.replace(' ', '').lower()[0:62]
providerName = 'postgres'
geomColumn = self.parameterAsString(parameters, self.GEOMETRY_COLUMN, context)
if not geomColumn:
geomColumn = 'geom'
options = {}
if overwrite:
options['overwrite'] = True
if convertLowerCase:
options['lowercaseFieldNames'] = True
geomColumn = geomColumn.lower()
if dropStringLength:
options['dropStringConstraints'] = True
if forceSinglePart:
options['forceSinglePartGeometryType'] = True
# Clear geometry column for non-geometry tables
if source.wkbType() == QgsWkbTypes.NoGeometry:
geomColumn = None
uri = db.uri
uri.setDataSource(schema, table, geomColumn, '', primaryKeyField)
if encoding:
options['fileEncoding'] = encoding
exporter = QgsVectorLayerExporter(uri.uri(), providerName, source.fields(),
source.wkbType(), source.sourceCrs(), overwrite, options)
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to PostGIS\n{0}').format(exporter.errorMessage()))
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not exporter.addFeature(f, QgsFeatureSink.FastInsert):
feedback.reportError(exporter.errorMessage())
feedback.setProgress(int(current * total))
exporter.flushBuffer()
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise QgsProcessingException(
self.tr('Error importing to PostGIS\n{0}').format(exporter.errorMessage()))
if geomColumn and createIndex:
db.create_spatial_index(table, schema, geomColumn)
db.vacuum_analyze(table, schema)
return {}