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Control feature append order

  • October 17, 2017
  • 5 replies
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L
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Hi,

I have a workspace with two creators which I use to create a single constant text line each. The rest of the workflow reads data and creates text lines depending on the content of the data (10 lines in this example). Now I want to write the text line of the first creator first to a text file, then the lines generated dependent on the data and the text line from creator_2 last. As Creator_2 is much faster then reading all the data in between, in the resulting text file I get the text line from Creator_1 first, then the line from Creator_2 and the lines from the data last. Is there a way to control that the line created by Creator_2 is written last?

So far I can only see that the Creator order can be controlled...

thanks,

Ludwig

Best answer by dustin

On the feature coming out of the first Creator, use your AttributeManager_1 to create an attribute of 'sort_att' with a value of 1. Use a Counter on the content data, with Count Output Attribute set to 'sort_att', and Count Start set to 2. On the last feature, use your AttributeManager_6 to create an attribute of 'sort_att' with a value of 9999 (just a number bigger than the number of content data features). Then feed all features into a Sorter prior to output, sorting Numerically and Ascending based on the attribute 'sort_att'.

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5 replies

thomas_merkus
Contributor
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  • thomas_merkusContributor
  • Contributor
  • 10 replies
  • October 17, 2017

Maybe you can combine a FeatureHolder, and a Sorter to make sure the features arrive in the right order to the Writer.

danilo_fme
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  • danilo_fmeCelebrity
  • Celebrity
  • 2077 replies
  • October 17, 2017

Maybe you can combine a FeatureHolder, and a Sorter to make sure the features arrive in the right order to the Writer.

Great suggestion @thomas_merkus

 

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dustin
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  • dustinInfluencer
  • Influencer
  • 629 replies
  • Best Answer
  • October 17, 2017

On the feature coming out of the first Creator, use your AttributeManager_1 to create an attribute of 'sort_att' with a value of 1. Use a Counter on the content data, with Count Output Attribute set to 'sort_att', and Count Start set to 2. On the last feature, use your AttributeManager_6 to create an attribute of 'sort_att' with a value of 9999 (just a number bigger than the number of content data features). Then feed all features into a Sorter prior to output, sorting Numerically and Ascending based on the attribute 'sort_att'.

takashi
Celebrity
  • takashiCelebrity
  • 7843 replies
  • October 17, 2017

If there is no blocking transformer on the data flow from the reader (10 text lines), you can just set "Yes" to the Create At End parameter in the Creator_2.

Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?
L
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  • ludhil
  • Author
  • 5 replies
  • October 17, 2017

On the feature coming out of the first Creator, use your AttributeManager_1 to create an attribute of 'sort_att' with a value of 1. Use a Counter on the content data, with Count Output Attribute set to 'sort_att', and Count Start set to 2. On the last feature, use your AttributeManager_6 to create an attribute of 'sort_att' with a value of 9999 (just a number bigger than the number of content data features). Then feed all features into a Sorter prior to output, sorting Numerically and Ascending based on the attribute 'sort_att'.

@cartoscro: That's it. Very useful easy transformers. I am a FME noob, but start to love it more and more!

 

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