push an item to and pull it from a list, what is my mistake?

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Joerg Vogel asked Oct 26 2017 at 2:00 PM Joerg Vogel commented Oct 27 2017 at 8:38 AM

push an item to and pull it from a list, what is my mistake?

I am trying to push an item to a list and later I am pulling the item with a WHERE clause? I make something totally wrong, because I can't get it working. It is just a small example. The item gets to the list in the onEntry trigger of the queue and is pulled in the onExit trigger of the processor.

WHERE id == tonum(item)

The id contains the same item converted to a number in the onEntry Trigger.

Is there an easier approach, because the reference is already on the list? It is the value column.

Software Version:

FlexSim 17.2.2

list sql pull item where

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Answer 1 · 2017-10-26T16:12:01Z

Mischa Spelt answered Oct 26 2017 at 4:12 PM Joerg Vogel commented Oct 27 2017 at 8:38 AM

@Cameron Pluim is close: item does not exist within the scope at which the query is evaluated, but you are already passing it in as puller in the fourth argument to List.pull so no need to do string conversions.

Inside the query, you can access the item as puller and something like

WHERE id == tonum(puller)

should work (untested though).

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Answer 2 · 2017-10-26T14:39:50Z

Cameron Pluim answered Oct 26 2017 at 2:39 PM Joerg Vogel commented Oct 27 2017 at 8:38 AM

@Jörg Vogel

The following code should work:

"WHERE id = " + numtostring(tonum(item))

I think the issue is that "item" is unknown within the scope of list.pull so you need to change it to a number before putting it in the string. But that is just my guess.

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