Vesa Sokka created NIFI-7969:
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Summary: 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: 1.12.0, 1.9.0
Reporter: Vesa Sokka
Attachments: image-2020-10-30-13-09-08-833.png
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?*
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