DatasetModel:SaveChanges Cancel The title field is required!

1. Roger Blanchard

   

   381 posts
   Registered:
   29 Jun 2018
   08 Nov 2019

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   We have added unbound fields to some of our TT as a way to flag our backend to NOT to do certain things. For many of our tables we create an xml message and send it off to SonicMQ. There are times where we do not want to do this. This flag field can tell the backend to NOT send the xml message. This does what we need but does not help us if we delete the record. I noticed there is an OVERLOAD for SaveChanges where I can pass a Progress.Lang.Object. What exactly is this OVERLOAD used for? Can I use it like we do when calling InvokeTask? Any doc examples?

    

   Thanks in advance.

2. Mike Fechner

   

   319 posts
   Registered:
   14 Sep 2016
   08 Nov 2019 in reply to Roger Blanchard

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   The optional argument to SaveChanges can be used exactly for that purpose.

   Within the Business Entity, it's accessible as THIS-OBJECT:SaveChangesParameter

3. Roger Blanchard

   

   381 posts
   Registered:
   29 Jun 2018
   08 Nov 2019 in reply to Mike Fechner

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   Hey Mike,

   Thanks for responding. I did see that last night and have that working by casting that over to my parameter object. I then need to get that parameter reference into my DataAccess class so I am casting THIS-OBJECT:DataAccessObject to my DataAccess Object class and then pass the parameter object.

   It all seems to work. The only thing I noticed is the DataAccessObject property is not valid in the BE and I have to use THIS-OBJECT:InitializeDataAccessObject (). Does that seem correct?

4. Mike Fechner

   

   319 posts
   Registered:
   14 Sep 2016
   Answered

   08 Nov 2019 in reply to Roger Blanchard

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   In this case, you should override the InitializeDataAccessObject method and pass on the reference after the SUPER:InitializeDataAccessObject 
5. Roger Blanchard

   

   381 posts
   Registered:
   29 Jun 2018
   08 Nov 2019 in reply to Mike Fechner

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   Great...thanks.

    

   I will give that a try.

6. Roger Blanchard

   

   381 posts
   Registered:
   29 Jun 2018
   08 Nov 2019 in reply to Mike Fechner

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   Okay, I have this working.

   I added the following to the InitializeDataAccessObject OVERRIDE after SUPER.

    

   DO ON ERROR UNDO, THROW:
      
      /* Roger Blanchard / Osprey Retail Systems Nov 8, 2019
       Lets call SetParameterObject in our DataAccess Object and pass our
       SaveChangesParameter so the DataAccess Object has access to it.
      */
      
      CAST (THIS-OBJECT:DataAccessObject, Osprey.CustomClasses.OERA.IOspreyDataAccess):SetParameterObject(THIS-OBJECT:SaveChangesParameter) .
      
      CATCH e AS Progress.Lang.Error:
       LogManagerWrapper:WriteError(e).
      END CATCH.
     END.

    

   I did also have to add the following to the SaveChanges OVERLOAD before SUPER. If on the client we used SaveChanges (oParameter) and then later used SaveChanges() the parameter object on the backend was still valid. The code below will clear the reference.

   IF VALID-OBJECT (THIS-OBJECT:DataAccessObject) THEN
     DO ON ERROR UNDO, THROW:
      
      CAST (THIS-OBJECT:DataAccessObject, Osprey.CustomClasses.OERA.IOspreyDataAccess):SetParameterObject(THIS-OBJECT:SaveChangesParameter) .
      
      CATCH e AS Progress.Lang.Error:
       LogManagerWrapper:WriteError(e).
      END CATCH.
     END.

    

   THANK YOU!!