Home » RADICORE development » Workflow » Workflow implementation question
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 Re: Workflow implementation question [message #2778 is a reply to message #2777] |
Tue, 16 August 2011 06:43   |
AJM
Messages: 2382
Registered: April 2006
Location: Surrey, UK
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Senior Member |
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It sounds like you need to make use of an Explicit OR-split with a guard, as shown in example #4 in Workflow Examples. In your case you need to create a workflow with the following:
1) Your start task is your ADD1 task.
2) There will be one place P1.
3) There will be two transitions:
- T1 (check for missing data), type=automatic
- T2 (add missing data), type=user
4) There will be five arcs:
- Start -> T1, Inward, Sequential
- T1 -> END, Outward, Explicit OR split, Guard= if (strlen($fieldarray['data']) < 1) return TRUE;
- T1 -> P1, Outward, Explicit OR split
- P1 -> T2, Inward, Sequential
- T2 -> END, Outward, Sequential
Transition T1 should be built using pattern UPDATE4. Although it will not actually update the database is has to end with a COMMIT so the the workflow engine knows that the transition has ended. You must ensure that $fieldarray contains the value that will be checked in the guard. For example, if you had multiple fields to check you could create a dummy field, such as GUARD_CONDITION, and set this to either TRUE of FALSE in your code.
When the workflow is started with the ADD1 task transition T1 will be fired automatically, and the guard will be evaluated. If TRUE the workflow will end, otherwise a token wil be placed on P1 which will wait for transition T2 to be fired. When T2 has been processed the workflow will end.
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| Re: Workflow implementation question [message #2788 is a reply to message #2778] |
Thu, 25 August 2011 13:14 |
grim
Messages: 11
Registered: July 2011
Location: Surrey, UK
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Junior Member |
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I have been working on my simple workflow and I cannot explain some things. The idea of the workflow is that if one of the data fields is initially left empty, a workflow item is put on the queue to remind the user to complete the data. I hope someone can point me in the correct direction.
Firstly, I set up the workflow as follows:
Insert data task (Add1) -> Place Start
Place Start -> Transition T1 Check for missing data (Upd4)
Transition T1 Check for missing data (Upd4); guard (if field completed) -> Place End
Transition T1 Check for missing data (Upd4); guard (default) -> Place P1
Place P1 -> Transition T2 Add missing data (Upd1); guard(if field completed) -> Place End
Place P1 -> Transition T2 Add missing data (Upd1); guard(default) -> Place P1
This works fine, I run the first task and when it has finished it leaves an item on the workitems queue if the data field is empty. If the field is completed no entries are added to the workitems queue. Clicking on the workitems link launches the update, updating the data ends the workflow. If the user just clicks submit without updating the field, the item remains on the queue.
I have put some debugging statements into _cm_pre_updateRecord to see what is in fieldarray. I have a two dimensional array, the first being the whole record of which there is only one. The second array is associative and contains each of my data fields. As I expected, it looks exactly the same whether it comes from the Upd4 process or the Upd1 process.
In my guard statement for the Upd4 process I have to refer to my data field as:
$fieldarray[0]['cref']
I expected this based on the above debug info. However, when I use the same statement in the Upd1 guard statement, it doesn't find my data. To make it work, I have to refer to my data field as:
$fieldarray['cref']
I cannot get even close to working out why the two statements are different especially when the format of the fieldarray is the same when in the _cm_pre_updateRecord function.
I hope that someone can answer this question for me.
As always, thanks in advance.
Regards
Graham Jones
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