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TestFilter not working as expected

  • February 10, 2014
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jon
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Using a TestFilter, I want to find matching IDs from two different sources.  The first source is a custom format with a field called ObjectID and the second source is from a FGDB feature class with a field called GlobalID (38 characters instead of 36 for some reason):

 

 

 

 

When I look at the format of each, FME says the following: ObjectID [string(38)]

 

GlobalID [char(38)] 

 

I thought my TestFilter wasn't working since the data types are different.  I added a StringFormatter to change both to a string (Format String: s) and thought this would do the trick.  I didn't or I don't know how to properly configure this.  I also tried removing the curly brackets but that didn't work either.

 

 

I copied the values out from the inspector, and from what I can tell, they are identical and SHOULD pass through the "Attribute Match" port. GlobalID = {1A34BEC4-FE38-4D9C-B280-75CEB5D8B6CB}

 

ObjectID = {1A34BEC4-FE38-4D9C-B280-75CEB5D8B6CB}

 

What am I missing??

Best answer by gazza

A TestFilter isn't the right transformer here, it only works on one feature at a time so you would only get a match if a feature had both GlobalID and ObjectID attributes that were identical.

 

 

Try using a FeatureMerger instead and match on GlobalID and ObjectID and look for matched data out the Merged port.
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2 replies

gazza
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  • gazzaContributor
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  • Best Answer
  • February 10, 2014
A TestFilter isn't the right transformer here, it only works on one feature at a time so you would only get a match if a feature had both GlobalID and ObjectID attributes that were identical.

 

 

Try using a FeatureMerger instead and match on GlobalID and ObjectID and look for matched data out the Merged port.
jon
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  • jonContributor
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  • February 11, 2014
Gazza - FeatureMerger did the trick.  Thanks for your guidance!

 

 

By the way, I just looked at the help for TestFilter/Tester (http://docs.safe.com/fme/html/FME_Transformers/Default.htm#Transformers/testfilter.htm) and didn't notice anything about it only working on one feature at a time.  How are you supposed to know that if it's not in the help?

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