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CarlesColl1-Visitor
1-Visitor
July 29, 2020
Question

Force Update Property Values to a older point in time and Farewell

  • July 29, 2020
  • 2 replies
  • 3008 views

Dear community,

 

This maybe my last post and contribution, it’s been 5 years with ThingWorx and IoT a long trip… starting on TW 6.0 up to TW 8.4 (just migrated two weeks ago). I’m moving out of ThingWorx and IoT space by the end of the month, to a totally new career type.

 

I’ve developed my last extension, because of TW 8.4, in order to Update Property Values to older times than current property time. Actually with TW 8.4 (I don’t know at what point between TW 7.3 and 8.4 this behavior changed) if you try to update a property to an older point in time, property write – if it’s logged- will be done on the ValueStream but not on the property itself. With the actual platform – at least Up to 8.5 - there isn’t any way to set a property back in time (current property value).

 

The right path, to resolve this, would be to open a support case and discuss with R&D if this is by design or a bug. I can understand the reasons to write only on the ValueStream for older values, actually I do by myself from the beginning – in order to ingest buffered or historical values – but they must let the developer decide. But I didn’t had time, that’s why I’ve built the extension.

 

The extension and source code it’s on this GitHub repository: https://github.com/carlescm/ThingWorxWorkaroundsExtension self service 🙂

 

That’s all folks!

Carles Coll

    2 replies

    P
    PaiChung22-Sapphire I
    22-Sapphire I
    July 29, 2020

    Thanks Charles, you'll be missed here 😞

    C
    CarlesColl1-VisitorAuthor
    1-Visitor
    July 30, 2020

    Hi Pai,

     

    Thanks! but for sure I left it on good hands.

     

    Carles.

      Z
      zyuan15-Regular Member
      5-Regular Member
      August 17, 2020

      I come to PTC by 2016 and you're already the expert in IOT field, wish you success in the next career!

      R
      rjanardan16-Pearl
      16-Pearl
      August 14, 2020

      @CarlesColl If I understood the use case correctly, it is as mentioned in this article.

       

      We had a customer whose historical values would come in batches and previously this used to alter the current value even if the timestamp of the current value is newer than the value coming in the batch. 

       

      The behaviour was changed in 8.3.13, 8.4.9, 8.5.5 & 9.0

       

      The earlier behaviour was like this

      1. UpdatePropertyValues – Change historic value, fire event and updates current value as well
      2. AddBooleanValueStreamEntry(as an example) – Change historic value, does not fire event and does not update current value

      The requirement(for UpdatePropertyValues) was to change historic value, fire event and should not update current value(unless the timestamp is newer than the current one). 

       

      Could you please give an example of when the previous behaviour would be useful? I would be happy to convey this to R&D. 

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