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How to assign attribute values based on CAD layer name?

  • March 20, 2020
  • 3 replies
  • 221 views
N

Hello all,

I am a relatively new FME user. I am looking for advice on the most efficient way to assign attribute values based on CAD layer name.

Specifically I am working with several sewer main layers that all begin with the diameter of the mains contained within. The way I have built out my work space does achieve what I am looking to do, however as you can see by then screenshot, it is horribly inefficient. I am wondering if anyone has any advice on how to consolidate the process I built out in that ridiculous branching process? Any advice would be much appreciated.

Note: I understand this can likely be achieved in python very easily. I am not expert with such methods so if there is a way to achieve what I am looking to do using strictly transformers, that would be preferable to python solutions. That said, python solutions are also appreciated.

Thanks,

Nate

Best answer by jovitaatsafe

Hi @nking,

Thanks for posting your question! Have you explored the use of conditional values yet at all? We've got a good article here on Testing with If-Then Conditional Statements. It includes a workspace template that you can download and explore as well. The idea is to do everything in the attribute-managing transformer (such as the AttributeManager). You can access it in the Attribute Value dropdown > Conditional Value... .

 

 

In this way you can set up a single transformer to test expressions like IF Diameter = 4, set <attribute-name> to <value>, ELSE IF Diameter = 6 ... etc. It can be a lengthy set up but it all happens in one transformer rather than multiple repeated. Hope that gives you some ideas to work with!

 

 

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3 replies

jovitaatsafe
Safer
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  • jovitaatsafeSafer
  • Safer
  • 635 replies
  • Best Answer
  • March 20, 2020

Hi @nking,

Thanks for posting your question! Have you explored the use of conditional values yet at all? We've got a good article here on Testing with If-Then Conditional Statements. It includes a workspace template that you can download and explore as well. The idea is to do everything in the attribute-managing transformer (such as the AttributeManager). You can access it in the Attribute Value dropdown > Conditional Value... .

 

 

In this way you can set up a single transformer to test expressions like IF Diameter = 4, set <attribute-name> to <value>, ELSE IF Diameter = 6 ... etc. It can be a lengthy set up but it all happens in one transformer rather than multiple repeated. Hope that gives you some ideas to work with!

 

 

N
  • nking
  • Author
  • 5 replies
  • March 20, 2020

Hi @nking,

Thanks for posting your question! Have you explored the use of conditional values yet at all? We've got a good article here on Testing with If-Then Conditional Statements. It includes a workspace template that you can download and explore as well. The idea is to do everything in the attribute-managing transformer (such as the AttributeManager). You can access it in the Attribute Value dropdown > Conditional Value... .

 

 

In this way you can set up a single transformer to test expressions like IF Diameter = 4, set <attribute-name> to <value>, ELSE IF Diameter = 6 ... etc. It can be a lengthy set up but it all happens in one transformer rather than multiple repeated. Hope that gives you some ideas to work with!

 

 

@jovitaatsafe this is exactly what I was looking for. Thank you for the advice!

ebygomm
Influencer
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  • ebygommInfluencer
  • Influencer
  • 3427 replies
  • March 20, 2020

If your layer names all being with a number followed by something else, you can also probably use a string searcher with a regular expression to create the value

e.g. the following will match any number(s) at the beginning of a value

^\d+

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