[NIFI-5060] UpdateRecord substringAfter and substringAfterLast only increments by 1

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.0, 1.6.0
• Fix Version/s: 1.7.0
• Component/s: Extensions
• Labels: easyfix newbie
• Assignee: Unassigned
• Reporter: Chris Green
• Created: 09/Apr/18 15:50
• Updated: 28/Aug/18 19:31
• Resolved: 28/Aug/18 19:31

Description

This is my first submitted issue, so please feel free to point me in the correct direction if I make process mistakes.

Replication:

Drag a GenerateFlowFile onto the canvas and configure this property, and set run schedule to some high value like 600 seconds

"Custom Text" {"value": "01230123"}

Connect GenerateFlowFile with an UpdateAttribute set to add the attribute "avro.schema" with a value of 

 

{ 
"type": "record", 
"name": "test", 
"fields" : [{"name": "value", "type": "string"}]
}

 

 

Connect UpdateAttribute to an UpdateRecord onto the canvas, Autoterminate success and failure. Set the Record Reader to a new JSONTreeReader. On the JsonTreeReader configure it to use the "Use 'Schema Text' Attribute".

Create a JsonRecordSetWriter and set the Schema Text to:

 

 

{ 
    "type": "record", 
    "name": "test", 
    "fields" : [
        {"name": "value", "type": "string"},
        {"name": "example1", "type": "string"},
        {"name": "example2", "type": "string"},
        {"name": "example3", "type": "string"},
        {"name": "example4", "type": "string"}
        ]
 }

 

Add the following properties to UpdateRecord

 

Heading 1	Heading 2
/example1	substringAfter(/value, "1")
/example2	substringAfter(/value, "123")
/example3	substringAfterLast(/value, "1")
/example4	substringAfterLast(/value, "123")

 

Resulting record currently:

 

[{ 
"value" : "01230123", 
"example1" : "230123", 
"example2" : "30123", 
"example3" : "23", 
"example4" : "3" 
}]

 

 

 

Problem:

When using the UpdateRecord processor, and the substringAfter() function after the search phrase is found it will only increment the substring returned by 1 rather than the length of the search term. 

Based off XPath and other implementations of substringAfter functions I've seen the value returned should remove the search term rather than just the first character of the search term.

 

 

Resulting record should be:

 

[{ 
"value" : "01230123", 
"example1" : "230123", 
"example2" : "0123", 
"example3" : "23", 
"example4" : "" 
}]

 

 

I'm cleaning up a fix with test code that will change the increment from 1 to the length of the search terms. 

It appears substringBefore are not impacted by the behavior as always returns the index before the found search term which is the expected behavior

Issue Links

• links to: GitHub Pull Request #2623