mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-31 00:06:02 -04:00
117 lines
3.9 KiB
Python
117 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
"""
|
|
/***************************************************************************
|
|
Name : DB Manager
|
|
Description : Database manager plugin for QGIS
|
|
Date : May 23, 2011
|
|
copyright : (C) 2011 by Giuseppe Sucameli
|
|
email : brush.tyler@gmail.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. *
|
|
* *
|
|
***************************************************************************/
|
|
"""
|
|
|
|
from qgis.core import QgsMessageLog
|
|
from ..plugin import BaseError
|
|
from ..data_model import (TableDataModel,
|
|
SqlResultModel,
|
|
SqlResultModelAsync,
|
|
SqlResultModelTask)
|
|
|
|
|
|
class PGTableDataModel(TableDataModel):
|
|
|
|
def __init__(self, table, parent=None):
|
|
self.cursor = None
|
|
TableDataModel.__init__(self, table, parent)
|
|
|
|
if self.table.rowCount is None:
|
|
self.table.refreshRowCount()
|
|
if self.table.rowCount is None:
|
|
return
|
|
|
|
self.table.aboutToChange.connect(self._deleteCursor)
|
|
self._createCursor()
|
|
|
|
def _createCursor(self):
|
|
fields_txt = u", ".join(self.fields)
|
|
table_txt = self.db.quoteId((self.table.schemaName(), self.table.name))
|
|
|
|
self.cursor = self.db._get_cursor()
|
|
sql = u"SELECT %s FROM %s" % (fields_txt, table_txt)
|
|
self.db._execute(self.cursor, sql)
|
|
|
|
def _sanitizeTableField(self, field):
|
|
# get fields, ignore geometry columns
|
|
if field.dataType.lower() == "geometry":
|
|
return u"CASE WHEN %(fld)s IS NULL THEN NULL ELSE GeometryType(%(fld)s) END AS %(fld)s" % {
|
|
'fld': self.db.quoteId(field.name)}
|
|
elif field.dataType.lower() == "raster":
|
|
return u"CASE WHEN %(fld)s IS NULL THEN NULL ELSE 'RASTER' END AS %(fld)s" % {
|
|
'fld': self.db.quoteId(field.name)}
|
|
return u"%s::text" % self.db.quoteId(field.name)
|
|
|
|
def _deleteCursor(self):
|
|
self.db._close_cursor(self.cursor)
|
|
self.cursor = None
|
|
|
|
def __del__(self):
|
|
self.table.aboutToChange.disconnect(self._deleteCursor)
|
|
self._deleteCursor()
|
|
pass # print "PGTableModel.__del__"
|
|
|
|
def fetchMoreData(self, row_start):
|
|
if not self.cursor:
|
|
self._createCursor()
|
|
|
|
try:
|
|
self.cursor.scroll(row_start, mode='absolute')
|
|
except self.db.error_types():
|
|
self._deleteCursor()
|
|
return self.fetchMoreData(row_start)
|
|
|
|
self.resdata = self.cursor.fetchmany(self.fetchedCount)
|
|
self.fetchedFrom = row_start
|
|
|
|
|
|
class PGSqlResultModelTask(SqlResultModelTask):
|
|
|
|
def __init__(self, db, sql, parent):
|
|
super().__init__(db, sql, parent)
|
|
|
|
def run(self):
|
|
try:
|
|
self.model = PGSqlResultModel(self.db, self.sql, None)
|
|
except BaseError as e:
|
|
self.error = e
|
|
QgsMessageLog.logMessage(e.msg)
|
|
return False
|
|
return True
|
|
|
|
def cancel(self):
|
|
self.db.connector.cancel()
|
|
SqlResultModelTask.cancel(self)
|
|
|
|
|
|
class PGSqlResultModelAsync(SqlResultModelAsync):
|
|
|
|
def __init__(self, db, sql, parent):
|
|
super().__init__()
|
|
|
|
self.task = PGSqlResultModelTask(db, sql, parent)
|
|
self.task.taskCompleted.connect(self.modelDone)
|
|
self.task.taskTerminated.connect(self.modelDone)
|
|
|
|
|
|
class PGSqlResultModel(SqlResultModel):
|
|
pass
|