freeopcua / opcua-modeler Goto Github PK

GUI to create OPC UA models and export them as XML

License: GNU General Public License v3.0

Python 99.72% Makefile 0.28%

opcua-modeler's Introduction

Open Source C++ OPC-UA Server and Client Library

LGPL OPC-UA server and client library written in C++ and with a lot of code auto-generated from xml specification using python.

Python bindings can be found in the python directory.

code: https://github.com/FreeOpcUa/freeopcua
website: http://freeopcua.github.io/
mailing list: https://groups.google.com/forum/#!forum/freeopcua

Currently supported:

read, write, browse
translateBrowsePathToNodeId
DataChange Events
Events
Subscriptions
complete opc-ua address space generated from xml specification
Method call from client
Linux and Windows(VS13) support

Work in progress

StatusChange Events
Filtering
Documentation
Automatic generation of binary protocol from OPC schema files
- Methods on server side

Not implemented yet (patches are welcome)

History
Security: Authentication, Certificates handling, ..

Usage

Documentation is sparse but several examples are availables:

C++ examples in https://github.com/FreeOpcUa/freeopcua/tree/master/src/examples
Python examples in https://github.com/FreeOpcUa/freeopcua/tree/master/python/src
https://github.com/FreeOpcUa/freeopcua/blob/master/python/tests/test_highlevel.py can also be a usefull source of information

Example minimal client in python

  client = opcua.Client(False)
  client.connect("opc.tcp://10.10.10.4:4841/OPCUA/AnyServer/")

  objects = client.get_objects_node()
  print("Children of objects are: ", objects.get_children())

  var = objects.get_child(["3:AnObject", "AVariable"])
  print("Value of variable is: ", var.get_value())
  
  client.disconnect()

Tested clients and servers with default settings

uaexperts client application
node-opcua (client and server tested)
ignition server
Beckhoff PLC (seems to be some issues, but mostly working)
ignition open-source sdk (server tested)
quickopc client sdk
prosysopc demo client
prosysopc demo server
unified automation sdk (client and server tested)

Installation

An environment supporting c++11 is necessary: gcc-4.8+, clang 3.4 or VS2013

Ubuntu (Debians)

There is a script debian.soft in the root for installing all required soft to build all repositories.

Using GNU autotools

autoreconf -f -i
./configure --prefix=/path/to/server
make 
make check
make install
cd /path/to/server
LD_LIBRARY_PATH=./lib ./bin/opcuaserver

Using cmake

Linux

mkdir build
cd build
cmake ..
make
make test

Windows

Boost and libxml2 are necessary

rem compiling
mkdir build
cd build
cmake .. -DBOOST_ROOT=c:\boost_1_56
cmake --build
ctest -C Debug
cd bin\Debug
example_server.exe

Docker

docker build .

Developement

C++ style

2 spaces not tab
CamelCase
Local variables start with small letter
Global/member variables starts with capital letters
Use provided automatic formatter (Artistic Style) by invoking ./restyle

python code and API should follows PEP8 (many places should be fixed)

Address space and most protocol code are auto-generated and should not be modified directly. Every auto-generated file starts with a mention that it should not be edited. There's a lot of old hand written protocol code left that should use the auto-generated code. This is done by uncommenting struct names in schemas/generate_protocol.py and removing old code and files in src/protocol and include/opc/ua/protocol/

opcua-modeler's People

Contributors

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Watchers

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davorcizmok pro hhdang zerox1212 cjue ulrichvonrekkenin john-zhong xiangkwang hanyangyexun fbarresi othermo erikesche akselov nagarsumit kevinterface landau1908 typedef-int-value yuting-li turnerth fr830 chixinfu nakwarsi xirid proteus-cpi eraic leandroordonez gitcontainer baitongda moorcheung make-stlye-change soysauce007 amit2016-17 benkinooby kunlina sunpinganlaw hardcorelife gaviscada sudo-jack-admin gx9702 knut0815 xiaoshumiaosxx xiangxud biancoroyal foufeifou desmith2 antwanhorbach sddai mio1000-g tubbz-alt phuongnam0907 winter5080 jameschen00 sangjiexun louislau86 0000duck giegloop ejt357 official-minister huanghui52 jw-nov cgoma jarkko-hautakorpi yetkinakyz mummyeye zplorer52 ruudsieb thq320722thq rootcon liyuanpng janikps jeffamaxey chenliuyang1989 20087843 mingtsung86 sangkyunyoon sim-hyunkyu snowfly568790005 honza123321 jettagx mil-son emossin yangzhinong rahul-p5 cheukwaylee zhouzheng-bingo luiskoo

opcua-modeler's Issues

Unexpected (problematic?) XML output of data variables 'value' components

When I create a variable of any underlying data type, within the saved XML the format is as follows:

<Value>
   <uax:Double>0.0</uax:Double>
</Value>

I'd expect something more like the following, so that an interpreter is able to create the correct value object component under a variable type object. See the example of the open62541 XML node-set compiler for reference.

<Value>
    <ListOfExtensionObject>
        <ExtensionObject>
            <TypeId>
                <Identifier>i=63</Identifier>
            </TypeId>
            <Body>
                <Argument>
                    <Name>stopped</Name>
                    <DataType>
                        <Identifier>i=11</Identifier>
                    </DataType>
                    <ValueRank>-1</ValueRank>
                    <ArrayDimensions></ArrayDimensions>
                    <Description/>
                </Argument>
            </Body>
        </ExtensionObject>
    </ListOfExtensionObject>
</Value>

This issue in node-red-contrib-iiot-opcua is the underlying use-case problem. Basically a node-set compiler of the node-opcua is not able to interpret the xml file correctly, which leads to the 'value' component not being created thus no read/write operations are possible. I'm not quite sure yet, if this is a problem with the modeler or the node-red or node-opcua projects.

Is this application can be called in the web browser?

Master Plan

Work in progress, feel free to fix and/or comments
every steps/module here is checked when it is roughly implemented. polishing will come later

0.1

0.2

Fix export of lists
Fix export of ExtensionObjects
remember last used values when adding nodes since users probably add many nodes of same types (to discuss)
release to pip
enable column resizing of qt views
add support for designing methods
Value attribute doesn't need to show server/source timestamps

0.3

UI for reference node sets (xml files like https://opcfoundation.org/UA/schemas/DI/1.00/Opc.Ua.Di.NodeSet2.xml)
Check if all attributes are really exported and implement missing ones
Correctly handle export and import of namespaces
start work on UI for methods

0.4

never crash UI
[x ] polish
better editor for extension objects
better editor/viewer for arrays
Do not use dialogs in namespace editor and allow for editing
use other servers internally for example open62541. that should be easy
more adaptive contextual menu

0.5

Implement reference editor
Use our own (minimal) file format uamodel to keep reference to external nodesets...

0.5.5

better UI for methods
Find a smart way to allow user to create their own custom ua structures (extensionobjects) (Important!!!)

0.6

do not close dialogs before node is created so users can retry before crashing
recent files menu
open tree to last used node after opening file
Edit methods

later:

restrict custom namespace to one? (uamodeler does it)
disable creating node in ns 0?
Instantiate Action (Maybe)
Cut Action (Maybe)
allow to modify node id and update links/references when changing nodeid of a node (maybe)
Display dialog to set namespace and maybe nodeid creation strategy and type when copying/instantiating nodes

New Object From Type Should be Bold

When adding a new object and selecting the object type, custom types should be bold.

Current:

Should be like DataTypes folder:

DataType is disappeared in case of importing UaModeler xml

As I import xml from UaModeler I found all of the child of the datatype are removed
https://www.unified-automation.com/products/development-tools/uamodeler.html

Methods and ObjectTypes are successfully transformed.

[0.3.1] AddingReference

Is adding references possible with the current version? Cannot find any menu or button

Multiple issues re-exporting xml

I loaded the "Devices Information Model" (from https://opcfoundation.org/UA/schemas/DI/1.00/Opc.Ua.Di.NodeSet2.xml) into the modeler and then just hit "Save As" (without any modification).

What I expected was to get the same XML back.

But unfortunately there are some issues here:

The order of the XML elements is different. TODO: Check if the specification says something about how to order the XML elements
The description value is invalid. It exports: Description="b'Defines the basic information components for all configurable elements in a device topology'" (Note the additional b and quotation) as an attribute. It should be a child tag.
The namespace urn:freeopcua:python:server should not be added automatically. We are using open62541 and thus don't need this namespace in the XML
The standard indentation for the official OPC UA XML files is 2 spaces, not 4 spaces
The attribute IsForward="true" should not be printed if it is the default value true. Only if false
The attribute IsAbstract="false" should not be printed if it is the default value false. Only if true

Open XML functionality does not work

I have installed a version with pip3.
I expect that this version should be able to open example.xml.
However I get the following error:

uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
opcua.server.address_space - WARNING - AddNodesItem: Requested NodeId NumericNodeId(i=2001) already exists')
uawidgets.utils - ERROR - The requested node id is already used by another node.(BadNodeIdExists)')
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/uawidgets/utils.py", line 21, in wrapper
result = func(self, *args)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 357, in _open
path = self._import(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 334, in _import
new_nodes = self.server_mgr.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 72, in import_xml
return self._backend.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 105, in import_xml
return self._server.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/server/server.py", line 422, in import_xml
return importer.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 63, in import_xml
node = self.add_object_type(nodedata)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 171, in add_object_type
res[0].StatusCode.check()
File "/usr/local/lib/python3.4/dist-packages/opcua/ua/uatypes.py", line 201, in check
raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)
uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
opcua.server.address_space - WARNING - AddNodesItem: Requested NodeId NumericNodeId(i=2001) already exists')
uawidgets.utils - ERROR - The requested node id is already used by another node.(BadNodeIdExists)')
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/uawidgets/utils.py", line 21, in wrapper
result = func(self, *args)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 357, in _open
path = self._import(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 334, in _import
new_nodes = self.server_mgr.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 72, in import_xml
return self._backend.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 105, in import_xml
return self._server.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/server/server.py", line 422, in import_xml
return importer.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 63, in import_xml
node = self.add_object_type(nodedata)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 171, in add_object_type
res[0].StatusCode.check()
File "/usr/local/lib/python3.4/dist-packages/opcua/ua/uatypes.py", line 201, in check
raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)
uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
opcua.server.address_space - WARNING - AddNodesItem: Requested NodeId NumericNodeId(i=2001) already exists')
uawidgets.utils - ERROR - The requested node id is already used by another node.(BadNodeIdExists)')
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/uawidgets/utils.py", line 21, in wrapper
result = func(self, *args)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 357, in _open
path = self._import(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 334, in _import
new_nodes = self.server_mgr.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 72, in import_xml
return self._backend.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 105, in import_xml
return self._server.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/server/server.py", line 422, in import_xml
return importer.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 63, in import_xml
node = self.add_object_type(nodedata)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 171, in add_object_type
res[0].StatusCode.check()
File "/usr/local/lib/python3.4/dist-packages/opcua/ua/uatypes.py", line 201, in check
raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)
uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
uamodeler.uamodeler - INFO - Starting server on opc.tcp://0.0.0.0:48400/freeopcua/uamodeler/')
opcua.server.address_space - WARNING - AddNodesItem: Requested NodeId NumericNodeId(i=2001) already exists')
uawidgets.utils - ERROR - The requested node id is already used by another node.(BadNodeIdExists)')
Traceback (most recent call last):
File "/usr/local/lib/python3.4/dist-packages/uawidgets/utils.py", line 21, in wrapper
result = func(self, *args)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 357, in _open
path = self._import(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/uamodeler.py", line 334, in _import
new_nodes = self.server_mgr.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 72, in import_xml
return self._backend.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/uamodeler/server_manager.py", line 105, in import_xml
return self._server.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/server/server.py", line 422, in import_xml
return importer.import_xml(path)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 63, in import_xml
node = self.add_object_type(nodedata)
File "/usr/local/lib/python3.4/dist-packages/opcua/common/xmlimporter.py", line 171, in add_object_type
res[0].StatusCode.check()
File "/usr/local/lib/python3.4/dist-packages/opcua/ua/uatypes.py", line 201, in check
raise UaStatusCodeError(self.value)
opcua.ua.uaerrors._auto.BadNodeIdExists: The requested node id is already used by another node.(BadNodeIdExists)

[0.3.1] ValueRank definition is set to "Scalar" when defining propery

When I create a property, the attribute ValueRank is pre-set to

This gives you some crashes when trying to change other values trying to convert "Scalar" to a int. I'd propose to set "-1" as a default

added variable types are not bold...

no idea why but nobody uses that yet...

Delete csvtoxml folder

This just a notice that we can now delete csvtoxml folder in this repository. This tool was a hack I made because there was no free modeling tool available. It's left over from before we decided to use the server in the background for designing an address space.

opcua-modeler is good enough now that we will never need this.

[master] Adding namespace results in a crash

I run master. New project -> right-click "Add namespace" -> "test" as value

Traceback (most recent call last):
  File "C:\Users\z\Documents\freeopcua-modeler\opcua-widgets\uawidgets\uti
ls.py", line 21, in wrapper
    result = func(self, *args)
  File "C:\Users\z\Documents\freeopcua-modeler\opcua-modeler\uamodeler\nam
espace_widget.py", line 127, in setModelData
    self.logger.info("Writting namespace array: %s", uries)
AttributeError: 'MyDelegate' object has no attribute 'logger'

During handling of the above exception, another exception occurred:

TypeError: NamespaceWidget.error[str].emit(): argument 1 has unexpected type 'At
tributeError'

Editing arguments of methods is broken...

Error parsing extension object

[Feature] Generate relevant Python code for objects

In UaModeler you can compile c / c++ code that are compliant with UA SDK.
This could be a great feature in the opcua modeler too. Thus, you can create your information model and generate the necessary python objects that are needed if you want to use the model in the freeopcua-python context.

Example: Structure datatypes (see BuildInfo of standard spec as example)

Exporter Not Exporting GUID as Structure

Exporting a GUID results in XML like this:

<Value>
  <uax:Guid>00000000-0000-0000-0000-000000000000</uax:Guid>
</Value>

It should be exported as a structure:

<Value>
  <uax:Guid>
    <uax:String>00000000-0000-0000-0000-000000000000</uax:String>
  </uax:Guid>
</Value>

loop and crash if copy/paste a node inside itself

[0.3.1] Copy-Paste Node does not modify Namespace id of browename and nodeid

Copy-paste should be of paste-environment and adjust Browsename accoringly
Also id generation should be consideren

show important errors with a dialog

we do not have time to read error with the current statusbar error display

[0.3.1] Copy-Paste of object on type level does not inherit type definition

When I copy an object A with typedefintion T and rename it to object B, the typedefinition ob B is A and not T.

P.S. sorry for flooding, it is okay?

Load multiple XML but only export custom added nodes

In OPC UA you can use multiple XML files as a basis and on top of them build your own information model.

E.g. I also want to use the "Devices" IM (https://opcfoundation.org/UA/schemas/DI/1.00/Opc.Ua.Di.NodeSet2.xml) for my modelling, and based on this build my own IM, let's say Namespace "urn:somestuff".
After modelling my own IM I only want to export the stuff I defined, not the whole "Devices" IM again, because it will be loaded separately into my OPC UA Server, so I only want to export the "urn:somestuff".

As far as I can see it that's currently not possible?

[Feature] Generate UML from UA Model

Hello,

it would be great if we could generate some UML class diagramm from a UA model.

If you read a companion spec, you might have seen some UML diagramms that visualize the UA model. I think that these diagramms are a good way to get a fast understanding of the given model. Thus, if you have to write some documentation of your model, you would have a "single source of truth". One might even create some special extensions for the opcua-modeler nodes in order to document the model / type / ... nodes and create some sort of auto-documentation from the UA model.

Since I am not familiar if there is some sort of XML specification for UML diagramms, I can not make an suggestion on technical details here.

[0.4] Saving Symmetric Reference Types does not work

Hi, i got a symmetric reference type without inverseName

  <UAReferenceType BrowseName="1:zz" NodeId="ns=1;i=4002" Symmetric="true">
    <DisplayName>zz</DisplayName>
    <References>
      <Reference IsForward="false" ReferenceType="HasSubtype">i=32</Reference>
    </References>
  </UAReferenceType>

Saving gives an error:
File "C:\freeopcua-modeler\python-opcua\opcua\common\xmlexporter.py", line 299, in add_etree_reference_type
self._add_sub_el(obj_el, 'InverseName', var.Value.Value.Text.decode('utf-8'))
AttributeError: 'NoneType' object has no attribute 'decode'

Odd behavour when adding XML-defined objects

Hi,

I stumbled upon some odd behaviour while trying to understand how to use XML Schemas. I used the myNS.xml example from open62541 docs.

So the opcua-modeler shows the object definitionas as expected (in Types/Object Types):

In the definition, Pump is a child of FieldDevice. However, if I add a new object (in Objects/a folder) as defined above, then unexpected results happen:

The device object has just two subnodes (ManufacturerName and ModelName), with no pump in it. Then if pump is added, it has all its subnodes plus ManufacturerName and ModelName. The last two variables are actually siblings of the pump and should not get as children in the pump description.

So the question is whether it is desired behaviour, there is something funny in the XML description, or whether there is a bug in the modeler handling objects?

cheers, Nikolay

svg warnings

qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5614
qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5626
qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5614
qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5626
qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5614
qt.svg: :/folder.svg:141:6: Could not resolve property: pattern5626

and how could i connect to local opc-server?

Access "Current Read" Not Shown

Nodes which are read only don't show their access level properly.

Node that has Current Read only:

Node with both Read and Write:

Add support for creating/editing custom types

How to connect to local opc server?

if i have an opc Server,how could i make them connect,maybe this question can be interpreted as where in the code "opcua-modeler" could i change to make it communicate with my local server, i provide local server's address or the code could identified the address of server by its own?

Wrong XML export of UAReferenceType

Hi,

XML the export of UAReferenceType is serialized like this

<DisplayName></DisplayName>
<InserseName></InverseName>
<References></References>

however UANodeSet.xsd requires the following order:

<DisplayName></DisplayName>
<References></References>
<InserseName></InverseName>

Open Should Clear Address Space after OK

If a model is open, and you press the open button, it clears the entire address space before allowing a new xml to be selected.

It should only clear the address space if a new xml is actually selected, that way cancel function works as expected (no changes to currently loaded address space).

Not able to create a property under a variable

Is this a design decision or expected behaviour? I was expecting to be able to create PropertyType-Variables under other Variables. In the documentation I've only read that PropertyType-Variables cannot be placed under other PropertyType-Variables. So does this apply to all variables?

Running Latest Release in Windows

I'm normally always running python code directly from an IDE. However today I tried to run modeler after installing via pip.

In windows you cannot do python opcua-modeler or python uamodeler.py .

You have to open the python console and type

>>>from uamodeler.uamodeler import main
>>>main()

Am I missing something obvious?

Could it cread ModellingRule?

I created my address space, but there is no ModellingRule in the xml. When I implement the new model with open62541(a opc ua sdk), it can't present the correct variant , because that variant has no ModellingRule. So help！

save relative path in uamodel not absolute

Installation help

Love the effort, and would really like to test the tool.

I thought I installed everything needed but when I try running app.py it complains as follows:

C:\Some\opcua-modeler-master>python app.py Traceback (most recent call last): File "app.py", line 3, in <module> main() File "C:\Some\opcua-modeler-master\uamodeler\uamodeler.py", line 434, in main modeler = UaModeler() File "C:\Some\opcua-modeler-master\uamodeler\uamodeler.py", line 58, in __init__ self._restore_state() File "C:\Some\opcua-modeler-master\uamodeler\uamodeler.py", line 182, in _restore_state self.restoreState(self.settings.value("main_window_state", b"")) TypeError: restoreState(self, Union[QByteArray, bytes, bytearray], version: int = 0): argument 1 has unexpected type 'sip.voidptr'

of course, I have limited experience in python (but no one else is creating a free infomodel tool)...

Add Unit Test for GUI

If I get some free time in the next weeks I was thinking about expanding my knowledge on unit tests. I have never wrote them before.

I read this and it doesn't look that difficult, but I think we should add this to modeler.
http://johnnado.com/pyqt-qtest-example/

I will probably need help because I'm inexperienced.

Auto NodeID assigns node IDs used by the default UA namespace

Starting from a new model, when I create a new object type and check the Auto NodeID button, the node ID that is assigned is 20001. Subsequent auto node IDs increment up from there.

20001 is already used by PubSubDiagnosticsDataSetWriterType_Counters_StateOperationalFromError_DiagnosticsLevel according to https://github.com/OPCFoundation/UA-Nodeset/blob/master/Schema/NodeIds.csv

Uri Export

Why are Uris over 2 the only ones exported?
uris = self.server.get_namespace_array()[2:]

Shouldn't indexes of 1 or greater be exported?

XML Implementation Discussion

Resume discussions on how to implement a UA model in XML from FreeOpcUa/python-opcua#248 to keep issues between project separated.

[0.4] Can not create ReferenceTypes

Menu is only limited to ObjectTypes

opcua-modeler: command not found

Trying to instal and run opcua-modeler:

$ pip3 install opcua-modeler
...
Successfully installed freeopcua lxml-3.5.0 opcua-modeler opcua-widgets python-dateutil pytz six-1.10.0
$ opcua-modeler
opcua-modeler: command not found

Where am I going wrong?

[0.3.1] Random crashes with module 'opcua.ua' has no attribute 'test_bit'

Traceback (most recent call last):
File "\WinPython-64bit-3.5.2.3Qt5\python-3.5.2.amd64
\lib\site-packages\uawidgets\attrs_widget.py", line 204, in createEditor
return BitEditor(parent, attr, dv.Value.Value)
File "\WinPython-64bit-3.5.2.3Qt5\python-3.5.2.amd64
\lib\site-packages\uawidgets\attrs_widget.py", line 30, in init
if ua.test_bit(val, el.value):
AttributeError: module 'opcua.ua' has no attribute 'test_bit'

First namespace

I have a problem reading a value from the internal OPC server. I use the QuickOPC toolkit and get the error message:

"The first namespace in the table must be the OPC-UA namespace."

After loading example.xml the namespace array contains:
[0] urn:freeopcua:python:server
[1] urx:mycompany:myproject

The screenshot that comes with the folder opcua-modeler (screenshot.png) shows index 0 with the value http://opcfoundation.org/UA/.

So, is the index 0 problem a bug or can I configure it somehow?

Since I used git clone, I assume, I have the most recent version ...

Best regards!

Importing comapnions Specs from VDMA-Euromap oraganisation

Devlopers I am trying to use this tool for my personal OPC_UA project. I want to create a instance model using nodsets released by Euromap organisation. I am attaching the link for downloading nodeset xml files from the organisations homepage.
http://www.euromap.org/en/euromap83 (Opc_Ua.EUROMAP83.NodeSet2.xml)
http://www.euromap.org/en/euromap77 (Opc_Ua.EUROMAP77.NodeSet2.xml)

using these two nodesets I want to create a new model, but if I try to add these nodesets I get exceptions. Commercial modellers such as UA Modeler can use these Nodesets.

Euromap is European Plastic and Rubber organisation, and Euromap Companion Specs will be used by industries all over world as European standards are taken as norm in most countries, so i think solwing this issue will open a large pool of user and supporters for this project.

Thanks

New Edit 11.07.2018########

Here is the exception when I try to add euromap 83 namespace from xml file. Before it I have addede da.di namespace.

[0.3.1] Unable to set value for attributes on type-level

The indicator is showing both type and value as "None" and crashes

showing error: invalid literal for int() with base 10: 'None' 1
Traceback (most recent call last):
File "\WinPython-64bit-3.5.2.3Qt5\python-3.5.2.amd64
\lib\site-packages\uawidgets\attrs_widget.py", line 237, in setModelData
dv.Value = string_to_variant(text, dtype)
File "\Downloads\WinPython-64bit-3.5.2.3Qt5\python-3.5.2.amd64
\lib\site-packages\opcua\common\ua_utils.py", line 113, in string_to_variant
return ua.Variant(string_to_val(string, vtype), vtype)
File "\WinPython-64bit-3.5.2.3Qt5\python-3.5.2.amd64
\lib\site-packages\opcua\common\ua_utils.py", line 84, in string_to_val
val = int(string)
ValueError: invalid literal for int() with base 10: 'None'

I have to add Value Node in XML manually

[0.4] How to load additional NodeSets

I have a dedicated files for instance (i.xml) and type (t.xml) node sets. How can I load t.xml first and i.xml later and work in it? Currently I can add both of them as reference node sets, but then opening a new file reloads the whole server.

ImportError: no such module uamodeler.uamodeler

Installed from pip version 0.4.0
Tried to run opcua-modeler and got this error:


 $ opcua-modeler
 Traceback (most recent call last):
   File "C:\Python27\Scripts\opcua-modeler-script.py", line 9, in <module>
     load_entry_point('opcua-modeler==0.4.0', 'console_scripts', 'opcua-modeler')()
   File "c:\python27\lib\site-packages\pkg_resources\__init__.py", line 542, in load_entry_point
     return get_distribution(dist).load_entry_point(group, name)
   File "c:\python27\lib\site-packages\pkg_resources\__init__.py", line 2569, in load_entry_point
     return ep.load()
   File "c:\python27\lib\site-packages\pkg_resources\__init__.py", line 2229, in load
     return self.resolve()
   File "c:\python27\lib\site-packages\pkg_resources\__init__.py", line 2235, in resolve
     module = __import__(self.module_name, fromlist=['__name__'], level=0)
 ImportError: No module named uamodeler.uamodeler

uamodeler module is missing the __init__.py file to allow it to be imported as a module.

Handle Methods Correctly

I'm look at fixing methods.

When comparing to UAModeler, I see that the simple method I created requires an extension object.

Is this normal? Do we need to support extension objects to support methods?

Method Argument in UAModeler:
You can see that UAModeler only keeps track of what kind of extension object to make, in this case (296 = Argument)

This is the XML that gets created.

This also breaks Free OPC UA Modeler, because it does not parse out the extension object at this time (see Value attribute):

If I can get some clues on how to approach this I can begin working on it.

support other internal servers (open62541 for example)

Should not be hard, I need to make a simple plugin architecture and use our client to access the internal server and optionaly support xml if server does not have xml support. It does require the server to support the node management service though!

@Pro @jpfr Does open62541 has python wrapper? or should I use Cython? I coult not find any ref to python in your repository, but I kind of remember seing something..... I could also simply start the server as an external command but that will make it hard to kill it properly...

Nodes with Children Don't Export

Currently, adding nodes with children doesn't export all the nodes.

For example if you instantiate an Object from an Object type which has children, only the instantiated object is exported.

When an object is added, we need to search for children recursively in _after_add method.

[0.3.1] Copy-Paste of an attribute results in creation of a variable

Is it a bug or a feature?