Gábor Gyimesi created NIFI-14780:
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Summary: XMLReader writes null value if "Field Name for Content"
is not set
Key: NIFI-14780
URL: https://issues.apache.org/jira/browse/NIFI-14780
Project: Apache NiFi
Issue Type: Bug
Reporter: Gábor Gyimesi
In the XMLReader controller service if the 'Parse XML Attributes' is set to
true then XML node attributes are written as record fields. In this case the
content and the attributes are defined together as a record. In such a case,
the name of the tag will be used as the name for the record and the value of
this property will be used as the name for the field holding the original
content. The 'Field Name for Content' property is used in this case to define
the field name for the content in the record. For example if this attribute is
set to 'tagValue' this will be the result using the XMLReader and the
JsonRecordSetWriter:
Input:
<note>
<to alias="TK">Kyle</to>
<from>Stan</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
Output:
[\{"to":{"alias":"TK","tagValue":"Kyle"},"from":"Stan","heading":"Reminder","body":"Don't
forget me this weekend!"}]
However when the 'Field Name for Content' is not set the content is meant to be
ignored and not written, resulting in the following debug message:
"Found content for a field that was supposed to be named with the value of the
"Field Name for Content" property but the property was not set. The content was
not added to the record."
This seems to be inconsistent with the result seen in the flow file, because
when the 'Field Name for Content' is empty a default "value" field is created
without any value:
[\{"to":{"alias":"TK","value":null},"from":"Stan","heading":"Reminder","body":"Don't
forget me this weekend!"}]
I think this is inconsistent, we should either create a default "value" record
field with the XML tag content if the "Field Name for Content" property is
empty or we should not create any default "value" record fields at all.
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