why Multipart/form-data removing Nill in response Mule Dataweave - mule

Question

Please find my request having tag <Date xsi:nil="true"/> when it crosses the Multipart/form-data dataweave it is removing the xsi:nil="true part which is not expected in my scenario. I wanted that to be out as the same.
Also it is removing the namespace which is not the expected case. If i trying declaring ns xsi http://www.w3.org/2001/XMLSchema-instance in the first dataweave. In the response root element it is prefixing xsi:Locations.
Im struggling with this.
Wanted the response as mentioned below, whatever the input is same should come out without altering.
Using writeNilOnNull=true is putting nill on all the fields which i dont want either, wanted only for date.
Could anyone help on this. Thank you.
Input:
<Locations xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Location>
<Id>2</Id>
<CarId>78</CarId>
<Packages>1</Packages>
<Date xsi:nil="true"/>
</Location>
</Locations>
Expected Response:
<Locations xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Location>
<Id>2</Id>
<CarId>78</CarId>
<Packages/>
<Date xsi:nil="true"/>
</Location>
</Locations>
Flow:
<flow name="question" doc:id="8c836a85-9d0a-47a8-8e5a-f670b16f91eb" >
<http:listener doc:name="Listener" doc:id="52ffdb08-9587-4cb2-8232-9467e85ea0dc" config-ref="HTTP_Listener_config" path="/question"/>
<ee:transform doc:name="Transform Message" doc:id="da995adf-196b-4c7b-a265-874f059ed1bb" >
<ee:message >
<ee:set-payload ><![CDATA[%dw 2.0
output application/xml
---
payload]]></ee:set-payload>
</ee:message>
</ee:transform>
<ee:transform doc:name="Transform Message" doc:id="75e5d876-855e-4d38-8468-3484c859f36e" >
<ee:message >
<ee:set-payload ><![CDATA[%dw 2.0
output multipart/form-data
---
{
"parts": {
"file": {
"headers": {
"Content-Disposition": {
"name": "file",
"filename": "",
"subtype": "form-data"
},
"Content-Type": "application/xml"
},
"content": payload
}
}
}]]></ee:set-payload>
</ee:message>
</ee:transform>
</flow>
</mule>

Answer 1

Add writeNilOnNull=true on your transformation. Like this
%dw 2.0
var x=read('<Locations xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Location>
<Id>2</Id>
<CarId>78</CarId>
<Packages>1</Packages>
<Date xsi:nil="true"/>
</Location>
</Locations>','application/xml')
output application/xml writeNilOnNull=true
---
x