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ImportIntoPostGIS.py
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ImportIntoPostGIS.py
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# -*- coding: utf-8 -*-
"""
***************************************************************************
ImportIntoPostGIS.py
---------------------
Date : October 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__ = 'October 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.core import (QgsVectorLayerExporter,
QgsSettings,
QgsApplication,
QgsProcessingUtils,
QgsProcessingParameterFeatureSource,
QgsProcessingParameterString,
QgsProcessingParameterField,
QgsProcessingParameterBoolean,
QgsWkbTypes)
from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
from processing.core.parameters import ParameterBoolean
from processing.core.parameters import ParameterVector
from processing.core.parameters import ParameterString
from processing.core.parameters import ParameterTableField
from processing.tools import postgis
class ImportIntoPostGIS(QgisAlgorithm):
DATABASE = 'DATABASE'
TABLENAME = 'TABLENAME'
SCHEMA = 'SCHEMA'
INPUT = 'INPUT'
OVERWRITE = 'OVERWRITE'
CREATEINDEX = 'CREATEINDEX'
GEOMETRY_COLUMN = 'GEOMETRY_COLUMN'
LOWERCASE_NAMES = 'LOWERCASE_NAMES'
DROP_STRING_LENGTH = 'DROP_STRING_LENGTH'
FORCE_SINGLEPART = 'FORCE_SINGLEPART'
PRIMARY_KEY = 'PRIMARY_KEY'
ENCODING = 'ENCODING'
def icon(self):
return QgsApplication.getThemeIcon("/providerQgis.svg")
def svgIconPath(self):
return QgsApplication.iconPath("providerQgis.svg")
def group(self):
return self.tr('Database')
def __init__(self):
super().__init__()
self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
self.tr('Layer to import')))
db_param = QgsProcessingParameterString(
self.DATABASE,
self.tr('Database (connection name)'))
db_param.setMetadata({
'widget_wrapper': {
'class': 'processing.gui.wrappers_postgis.ConnectionWidgetWrapper'}})
self.addParameter(db_param)
schema_param = QgsProcessingParameterString(
self.SCHEMA,
self.tr('Schema (schema name)'), 'public', False, True)
schema_param.setMetadata({
'widget_wrapper': {
'class': 'processing.gui.wrappers_postgis.SchemaWidgetWrapper',
'connection_param': self.DATABASE}})
self.addParameter(schema_param)
table_param = QgsProcessingParameterString(
self.TABLENAME,
self.tr('Table to import to (leave blank to use layer name)'), '', False, True)
table_param.setMetadata({
'widget_wrapper': {
'class': 'processing.gui.wrappers_postgis.TableWidgetWrapper',
'schema_param': self.SCHEMA}})
self.addParameter(table_param)
self.addParameter(QgsProcessingParameterField(self.PRIMARY_KEY,
self.tr('Primary key field'), None, self.INPUT, QgsProcessingParameterField.Any, False, True))
self.addParameter(QgsProcessingParameterString(self.GEOMETRY_COLUMN,
self.tr('Geometry column'), 'geom'))
self.addParameter(QgsProcessingParameterString(self.ENCODING,
self.tr('Encoding'), 'UTF-8',
False, True))
self.addParameter(QgsProcessingParameterBoolean(self.OVERWRITE,
self.tr('Overwrite'), True))
self.addParameter(QgsProcessingParameterBoolean(self.CREATEINDEX,
self.tr('Create spatial index'), True))
self.addParameter(QgsProcessingParameterBoolean(self.LOWERCASE_NAMES,
self.tr('Convert field names to lowercase'), True))
self.addParameter(QgsProcessingParameterBoolean(self.DROP_STRING_LENGTH,
self.tr('Drop length constraints on character fields'), False))
self.addParameter(QgsProcessingParameterBoolean(self.FORCE_SINGLEPART,
self.tr('Create single-part geometries instead of multi-part'), False))
def name(self):
return 'importintopostgis'
def displayName(self):
return self.tr('Import into PostGIS')
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.parameterAsBool(parameters, self.OVERWRITE, context)
createIndex = self.parameterAsBool(parameters, self.CREATEINDEX, context)
convertLowerCase = self.parameterAsBool(parameters, self.LOWERCASE_NAMES, context)
dropStringLength = self.parameterAsBool(parameters, self.DROP_STRING_LENGTH, context)
forceSinglePart = self.parameterAsBool(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)
table = self.parameterAsString(parameters, self.TABLENAME, context)
if table:
table.strip()
if not table or table == '':
table = layer.name()
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 GeoAlgorithmExecutionException(
self.tr('Error importing to PostGIS\n{0}').format(exporter.errorMessage()))
features = source.getFeatures()
total = 100.0 / source.featureCount()
for current, f in enumerate(features):
if feedback.isCanceled():
break
if not exporter.addFeature(f):
feedback.reportError(exporter.errorMessage())
feedback.setProgress(int(current * total))
exporter.flushBuffer()
if exporter.errorCode() != QgsVectorLayerExporter.NoError:
raise GeoAlgorithmExecutionException(
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 {}
def dbConnectionNames(self):
settings = QgsSettings()
settings.beginGroup('/PostgreSQL/connections/')
return settings.childGroups()