beremiz

Dirty fix for error '_object_has_no_attribute_'getSlave' in EtherCAT extension

2018-08-10, Andrey Skvortsov
a3ac46366b86
Dirty fix for error '_object_has_no_attribute_'getSlave' in EtherCAT extension

traceback:
File "/home/developer/WorkData/PLC/beremiz/beremiz/IDEFrame.py", line 1433, in OnPouSelectedChanged
window.RefreshView()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 837, in RefreshView
self.RefreshProcessVariables()
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/ConfigEditor.py", line 886, in RefreshProcessVariables
slaves = self.Controler.GetSlaves(**self.CurrentNodesFilter)
File "/home/developer/WorkData/PLC/beremiz/beremiz/etherlab/EthercatMaster.py", line 341, in GetSlaves
for slave in self.Config.getConfig().getSlave():
:_'lxml.etree._Element'_object_has_no_attribute_'getSlave'

Steps to reproduce problem:

- Add new EtherCAT master
- Add new EthercatNode to the master
- double click on


this is looks like dirty hack to fix strange problem with initial[0]
changing its type after returning from _init_ method to lxml.etree._Element
As a result all methods generated by class factory are lost.

For example, in function initMethod initial[0].__class__ points to
xmlclass.xmlclass.Config. After map(self.append, initial)
self.Config.__class__ is 'xmlclass.xmlclass.Config' as well.
But after returning from initMethod (_init) in CreateElement
self.Config.__class__ has changed to lxml.etree._Element.


I've noticed similar behavior if copy/deepcopy is used for any child
of etree.ElementBase. See simple example below.
[-------------------------------------------------------------]
#!/usr/bin/python

from __future__ import print_function
from lxml import etree
import copy

class DefaultElementClass(etree.ElementBase):
def getLocalTag(self):
return etree.QName(self.tag).localname


def printInformation(x):
print(x, x.__class__, "getLocalTag" in dir(x))


a = DefaultElementClass()
printInformation(a)

#
printInformation(copy.copy(a))
printInformation(copy.deepcopy(a))
[-------------------------------------------------------------]
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from __future__ import absolute_import
import wx
from subindextable import EditingPanel
from nodeeditortemplate import NodeEditorTemplate
from editors.ConfTreeNodeEditor import ConfTreeNodeEditor
[
ID_SLAVEEDITORCONFNODEMENUNODEINFOS, ID_SLAVEEDITORCONFNODEMENUDS301PROFILE,
ID_SLAVEEDITORCONFNODEMENUDS302PROFILE, ID_SLAVEEDITORCONFNODEMENUDSOTHERPROFILE,
ID_SLAVEEDITORCONFNODEMENUADD,
] = [wx.NewId() for _init_coll_ConfNodeMenu_Items in range(5)]
[
ID_SLAVEEDITORADDMENUSDOSERVER, ID_SLAVEEDITORADDMENUSDOCLIENT,
ID_SLAVEEDITORADDMENUPDOTRANSMIT, ID_SLAVEEDITORADDMENUPDORECEIVE,
ID_SLAVEEDITORADDMENUMAPVARIABLE, ID_SLAVEEDITORADDMENUUSERTYPE,
] = [wx.NewId() for _init_coll_AddMenu_Items in range(6)]
class SlaveEditor(ConfTreeNodeEditor, NodeEditorTemplate):
CONFNODEEDITOR_TABS = [
(_("CANOpen slave"), "_create_SlaveNodeEditor")]
def _create_SlaveNodeEditor(self, prnt):
self.SlaveNodeEditor = EditingPanel(prnt, self, self.Controler, self.Editable)
return self.SlaveNodeEditor
def __init__(self, parent, controler, window, editable=True):
self.Editable = editable
ConfTreeNodeEditor.__init__(self, parent, controler, window)
NodeEditorTemplate.__init__(self, controler, window, False)
def __del__(self):
self.Controler.OnCloseEditor(self)
def GetConfNodeMenuItems(self):
if self.Editable:
add_menu = [(wx.ITEM_NORMAL, (_('SDO Server'), ID_SLAVEEDITORADDMENUSDOSERVER, '', self.OnAddSDOServerMenu)),
(wx.ITEM_NORMAL, (_('SDO Client'), ID_SLAVEEDITORADDMENUSDOCLIENT, '', self.OnAddSDOClientMenu)),
(wx.ITEM_NORMAL, (_('PDO Transmit'), ID_SLAVEEDITORADDMENUPDOTRANSMIT, '', self.OnAddPDOTransmitMenu)),
(wx.ITEM_NORMAL, (_('PDO Receive'), ID_SLAVEEDITORADDMENUPDORECEIVE, '', self.OnAddPDOReceiveMenu)),
(wx.ITEM_NORMAL, (_('Map Variable'), ID_SLAVEEDITORADDMENUMAPVARIABLE, '', self.OnAddMapVariableMenu)),
(wx.ITEM_NORMAL, (_('User Type'), ID_SLAVEEDITORADDMENUUSERTYPE, '', self.OnAddUserTypeMenu))]
profile = self.Controler.GetCurrentProfileName()
if profile not in ("None", "DS-301"):
other_profile_text = _("%s Profile") % profile
add_menu.append((wx.ITEM_SEPARATOR, None))
for text, _indexes in self.Manager.GetCurrentSpecificMenu():
add_menu.append((wx.ITEM_NORMAL, (text, wx.NewId(), '', self.GetProfileCallBack(text))))
else:
other_profile_text = _('Other Profile')
return [(wx.ITEM_NORMAL, (_('DS-301 Profile'), ID_SLAVEEDITORCONFNODEMENUDS301PROFILE, '', self.OnCommunicationMenu)),
(wx.ITEM_NORMAL, (_('DS-302 Profile'), ID_SLAVEEDITORCONFNODEMENUDS302PROFILE, '', self.OnOtherCommunicationMenu)),
(wx.ITEM_NORMAL, (other_profile_text, ID_SLAVEEDITORCONFNODEMENUDSOTHERPROFILE, '', self.OnEditProfileMenu)),
(wx.ITEM_SEPARATOR, None),
(add_menu, (_('Add'), ID_SLAVEEDITORCONFNODEMENUADD))]
return []
def RefreshConfNodeMenu(self, confnode_menu):
if self.Editable:
confnode_menu.Enable(ID_SLAVEEDITORCONFNODEMENUDSOTHERPROFILE, False)
def RefreshView(self):
ConfTreeNodeEditor.RefreshView(self)
self.SlaveNodeEditor.RefreshIndexList()
def RefreshCurrentIndexList(self):
self.RefreshView()
def RefreshBufferState(self):
self.ParentWindow.RefreshTitle()
self.ParentWindow.RefreshFileMenu()
self.ParentWindow.RefreshEditMenu()
self.ParentWindow.RefreshPageTitles()
class MasterViewer(SlaveEditor):
SHOW_BASE_PARAMS = False
SHOW_PARAMS = False
def __init__(self, parent, controler, window, tagname):
SlaveEditor.__init__(self, parent, controler, window, False)
self.TagName = tagname
def GetTagName(self):
return self.TagName
def GetCurrentNodeId(self):
return None
def GetInstancePath(self):
return self.Controler.CTNFullName() + ".generated_master"
def GetTitle(self):
return self.GetInstancePath()
def IsViewing(self, tagname):
return self.GetInstancePath() == tagname
def RefreshView(self):
self.SlaveNodeEditor.RefreshIndexList()