Problem Concerning Query and List Expression

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chia725 asked Mar 11, '24 Jeanette F commented Mar 18, '24

Problem Concerning Query and List Expression

Hello,

I have encounter some problem when using pull from list-Query. What I am trying to do is I want the Agv to grab the product type base on the one stated in the fromto global table. I use the trigger in 3D model to label the item. Then I create a List expression to record it like this.

圖片1.png

I registered all the information on the token.

But there comes up with some problem when i use the Query.

I am wondering if there's anything that need to be fixed with the syntax or any suggestion. My model is attached as below, thank you very much for any of your help!

my model:demo1-0312.fsm

Software Version:

FlexSim 23.1.4

query processs flow globaltable

圖片1.png (894.2 KiB)

1710174875510.png (12.3 KiB)

1710174959547.png (9.2 KiB)

demo1-0312.fsm (66.4 KiB)

· 1

Jeanette F ♦♦ commented · Mar 18 at 03:42 PM

Hi @chia725, was Felix Möhlmann's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always comment back to reopen your question.

0 ·

Answer 1 · 2024-03-11T17:31:12Z

Felix Möhlmann answered Mar 11, '24 Felix Möhlmann commented Mar 12, '24

"item" isn't a valid variable in a list expression. To access the value on the list use value. If all you want to do is read a label of the value then you can use a label field instead of an expression.

The item list actually comes with a field for the "Type" label by default.

1710178248899.png (5.7 KiB)

· 4

chia725 commented · Mar 12 at 04:15 AM

Thank you for your help! The list works well based on your suggestion! But I found that after I modify the syntax the Query did no work as expected. Like all the token will stuck at the pull from list activity. I am wondering if there's a need to do some modify to the Query of Pull from list. Thank you so much for your help!

demo1-03122.fsm

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demo1-03122.fsm (66.7 KiB)

Felix Möhlmann chia725 commented · Mar 12 at 07:04 AM

Apart from how the list expression was defined your query was fine, why did you change it.

I don't really know what the new query is supposed to accomplish.

Even if a number was a valid parameter for the "find" method (it is not, the passed in value must be a string), why would the type be equal to some object in the model?

Further down you try to pull an item from a list partitioned by the TE. I don't see a point in the model where items would be pushed to that list.

And finally, instead of keeping names in the token labels and using model.find() everywhere, you could also just use model.find() directly when creating the labels.

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1710226850609.png (4.0 KiB)

1710227044787.png (10.8 KiB)

chia725 Felix Möhlmann commented · Mar 12 at 07:34 AM

Thank you for your clarify! The reason I changed my Query is because when I use the old query nothing is pulled out from the list. I'll keep my old version, thank you. Since the toload activity is pulled from the list which register the item when it enters query. And there's already a lot of items in the list but nothing be pulled out.

So I was wondering why it did not work. Thank you!

modified0312.fsm

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1710228650602.png (5.7 KiB)

modified0312.fsm (67.9 KiB)

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