[jira] [Updated] (NIFI-7969) XMLReader / ValidateRecord: arrays are not read correctly

["Peter Turcsanyi (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-7969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Peter Turcsanyi updated NIFI-7969:
----------------------------------
    Fix Version/s: 1.14.0
       Resolution: Fixed
           Status: Resolved  (was: Patch Available)

> XMLReader / ValidateRecord: arrays are not read correctly
> ---------------------------------------------------------
>
>                 Key: NIFI-7969
>                 URL: https://issues.apache.org/jira/browse/NIFI-7969
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework, Extensions
>    Affects Versions: 1.9.0, 1.12.0
>            Reporter: Vesa Sokka
>            Assignee: Peter Gyori
>            Priority: Major
>              Labels: records, validation, xml
>             Fix For: 1.14.0
>
>         Attachments: image-2020-10-30-13-09-08-833.png, xml_array.xml
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> I'm trying to convert XML to JSON with ValidateRecord using XMLReader. Arrays with multiple elements work fine, but an *array with only one element fails*.
>  
> In XMLReader docs it says clearly:
> _"If a field in a schema is embedded in an array, the *reader expects zero, one or more* occurrences of the field in a record. "_
> But in fact an array with only one field is transferred to "invalid" with an error message:
> "Record #1 is invalid due to:
>  content1 is not a valid value for /array_field: Value is of type java.lang.String but was expected to be of type ARRAY[STRING]"
>  
> examples modified from:
>  [https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-record-serialization-services-nar/1.12.1/org.apache.nifi.xml.XMLReader/additionalDetails.]
> !image-2020-10-30-13-09-08-833.png|height=250!
> _Both examples have same schema_;
> {code:json}
> { 
>  "namespace": "nifi",
>  "name": "test",
>  "type": "record",
>  "fields": [ 
>    { "name": "array_field", 
>      "type": 
>      { "type": "array", "items": "string" } 
>    }
>  ]
> }
> {code}
>  
>   
> *Example 1* (success)
> {code:xml}
> <record> 
>  <array_field>content1</array_field>
>  <array_field>content2</array_field>
> </record> {code}
> --> *valid*+:+
> {code:json}
> [{"array_field":["content1","content2"]}]
> {code}
>  
> *Example 2* (invalid):
> Same as example 1, but the second array_field removed
> {code:xml}
> <record> 
>  <array_field>content1</array_field>
> </record>
> {code}
> --> *invalid* 
> {code:json}
> [{"array_field":"content1"}]{code}
>  
>  
> *Seems to be a BUG or is this an error in the processor documentation?*
>  
> Template attached:
> xml_array.xml
>   



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