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163 lines
6.9 KiB
Python
163 lines
6.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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***************************************************************************
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ImportIntoPostGIS.py
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---------------------
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Date : October 2012
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Copyright : (C) 2012 by Victor Olaya
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Email : volayaf at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************
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"""
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__author__ = 'Victor Olaya'
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__date__ = 'October 2012'
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__copyright__ = '(C) 2012, Victor Olaya'
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# This will get replaced with a git SHA1 when you do a git archive
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__revision__ = '$Format:%H$'
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from PyQt4.QtCore import QSettings
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from qgis.core import QgsDataSourceURI, QgsVectorLayerImport
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from processing.core.GeoAlgorithm import GeoAlgorithm
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from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
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from processing.core.parameters import ParameterBoolean
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from processing.core.parameters import ParameterVector
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from processing.core.parameters import ParameterString
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from processing.core.parameters import ParameterSelection
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from processing.core.parameters import ParameterTableField
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from processing.tools import dataobjects
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from processing.algs.qgis import postgis_utils
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class ImportIntoPostGIS(GeoAlgorithm):
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DATABASE = 'DATABASE'
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TABLENAME = 'TABLENAME'
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SCHEMA = 'SCHEMA'
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INPUT = 'INPUT'
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OVERWRITE = 'OVERWRITE'
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CREATEINDEX = 'CREATEINDEX'
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GEOMETRY_COLUMN = 'GEOMETRY_COLUMN'
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LOWERCASE_NAMES = 'LOWERCASE_NAMES'
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DROP_STRING_LENGTH = 'DROP_STRING_LENGTH'
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PRIMARY_KEY = 'PRIMARY_KEY'
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def processAlgorithm(self, progress):
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connection = self.DB_CONNECTIONS[self.getParameterValue(self.DATABASE)]
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schema = self.getParameterValue(self.SCHEMA)
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overwrite = self.getParameterValue(self.OVERWRITE)
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createIndex = self.getParameterValue(self.CREATEINDEX)
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convertLowerCase = self.getParameterValue(self.LOWERCASE_NAMES)
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dropStringLength = self.getParameterValue(self.DROP_STRING_LENGTH)
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primaryKeyField = self.getParameterValue(self.PRIMARY_KEY)
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settings = QSettings()
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mySettings = '/PostgreSQL/connections/' + connection
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try:
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database = settings.value(mySettings + '/database')
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username = settings.value(mySettings + '/username')
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host = settings.value(mySettings + '/host')
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port = settings.value(mySettings + '/port', type=int)
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password = settings.value(mySettings + '/password')
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except Exception as e:
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raise GeoAlgorithmExecutionException(
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self.tr('Wrong database connection name: %s' % connection))
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layerUri = self.getParameterValue(self.INPUT)
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layer = dataobjects.getObjectFromUri(layerUri)
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table = self.getParameterValue(self.TABLENAME).strip()
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if table == '':
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table = layer.name()
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table = table.replace(' ', '').lower()
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providerName = 'postgres'
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try:
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db = postgis_utils.GeoDB(host=host, port=port, dbname=database,
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user=username, passwd=password)
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except postgis_utils.DbError as e:
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raise GeoAlgorithmExecutionException(
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self.tr("Couldn't connect to database:\n%s" % e.message))
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geomColumn = self.getParameterValue(self.GEOMETRY_COLUMN)
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if not geomColumn:
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geomColumn = 'the_geom'
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options = {}
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if overwrite:
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options['overwrite'] = True
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if convertLowerCase:
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options['lowercaseFieldNames'] = True
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geomColumn = geomColumn.lower()
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if dropStringLength:
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options['dropStringConstraints'] = True
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#clear geometry column for non-geometry tables
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if not layer.hasGeometryType():
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geomColumn = None
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uri = QgsDataSourceURI()
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uri.setConnection(host, unicode(port), database, username, password)
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if primaryKeyField:
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uri.setDataSource(schema, table, geomColumn, '', primaryKeyField)
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else:
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uri.setDataSource(schema, table, geomColumn, '')
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(ret, errMsg) = QgsVectorLayerImport.importLayer(
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layer,
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uri.uri(),
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providerName,
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self.crs,
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False,
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False,
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options,
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)
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if ret != 0:
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raise GeoAlgorithmExecutionException(
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self.tr('Error importing to PostGIS\n%s' % errMsg))
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if geomColumn and createIndex:
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db.create_spatial_index(table, schema, geomColumn)
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db.vacuum_analyze(table, schema)
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def dbConnectionNames(self):
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settings = QSettings()
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settings.beginGroup('/PostgreSQL/connections/')
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return settings.childGroups()
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def defineCharacteristics(self):
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self.name, self.i18n_name = self.trAlgorithm('Import into PostGIS')
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self.group, self.i18n_group = self.trAlgorithm('Database')
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self.addParameter(ParameterVector(self.INPUT,
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self.tr('Layer to import')))
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self.DB_CONNECTIONS = self.dbConnectionNames()
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self.addParameter(ParameterSelection(self.DATABASE,
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self.tr('Database (connection name)'), self.DB_CONNECTIONS))
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self.addParameter(ParameterString(self.SCHEMA,
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self.tr('Schema (schema name)'), 'public'))
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self.addParameter(ParameterString(self.TABLENAME,
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self.tr('Table to import to (leave blank to use layer name)')))
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self.addParameter(ParameterTableField(self.PRIMARY_KEY,
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self.tr('Primary key field'), self.INPUT, optional=True))
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self.addParameter(ParameterString(self.GEOMETRY_COLUMN,
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self.tr('Geometry column'), 'geom'))
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self.addParameter(ParameterBoolean(self.OVERWRITE,
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self.tr('Overwrite'), True))
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self.addParameter(ParameterBoolean(self.CREATEINDEX,
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self.tr('Create spatial index'), True))
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self.addParameter(ParameterBoolean(self.LOWERCASE_NAMES,
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self.tr('Convert field names to lowercase'), True))
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self.addParameter(ParameterBoolean(self.DROP_STRING_LENGTH,
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self.tr('Drop length constraints on character fields'), False))
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