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AutoincrementalField.py
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AutoincrementalField.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
AutoincrementalField.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from qgis.PyQt.QtCore import QVariant
from qgis.core import (QgsField,
QgsFeature,
QgsFeatureSink,
QgsApplication,
QgsProcessingUtils,
QgsProcessingParameterFeatureSource,
QgsProcessingParameterFeatureSink,
QgsProcessingOutputVectorLayer)
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
class AutoincrementalField(QgisAlgorithm):
INPUT = 'INPUT'
OUTPUT = 'OUTPUT'
def __init__(self):
super().__init__()
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
self.tr('Input layer')))
self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Incremented')))
self.addOutput(QgsProcessingOutputVectorLayer(self.OUTPUT, self.tr('Incremented')))
def group(self):
return self.tr('Vector table tools')
def name(self):
return 'addautoincrementalfield'
def displayName(self):
return self.tr('Add autoincremental field')
def processAlgorithm(self, parameters, context, feedback):
source = self.parameterAsSource(parameters, self.INPUT, context)
fields = source.fields()
fields.append(QgsField('AUTO', QVariant.Int))
(sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
fields, source.wkbType(), source.sourceCrs())
features = source.getFeatures()
total = 100.0 / source.featureCount() if source.featureCount() else 0
for current, input_feature in enumerate(features):
if feedback.isCanceled():
break
output_feature = input_feature
attributes = input_feature.attributes()
attributes.append(current)
output_feature.setAttributes(attributes)
sink.addFeature(output_feature, QgsFeatureSink.FastInsert)
feedback.setProgress(int(current * total))
return {self.OUTPUT: dest_id}