RestDataSource.removeData(record) => record empty

[AloneAgainOr]

SmartGWT 2.5
SmartClient Version: SC_SNAPSHOT-2011-08-02/LGPL Development Only (built 2011-08-02)

IE 8.0.7601.17514

I'm using RestDataSource and hand written servlets.
Everything goes fine with fetchData, addData and updateData.

But with removeData, the servlet only receives parameters
_operationType="remove"
isc_dataFormat="json"
_dataSource="isc_RestDataSource_6"
isc_metaDataPrefix="_"

All data from the record I pass to removeData is lost.
As a workaround, I use a DSRequest and dsRequest.setData(map).
The values in the map appear as parameters in the servlet.
Any ideas? Is this a misunderstanding on my side or a bug or ...

[atomatom]

You might try a different 'dataProtocol' on your rest datasource. I set it to 'postMessage' and that passes the data as the request body.

[AloneAgainOr]

The method already is post, as can be seen in the RPCRequest in the Developer Console:
{
"actionURL":"riacsc/dispatch/ttw/delete",
"showPrompt":true,
"transport":"xmlHttpRequest",
"useSimpleHttp":true,
"promptStyle":"cursor",
"params":{
"_operationType":"remove",
"_dataSource":"isc_RestDataSource_6",
"isc_metaDataPrefix":"_",
"isc_dataFormat":"json"
},
"httpMethod":"POST",
"sendNoQueue":true,
"bypassCache":true,
"callback":{
"target":[RestDataSource ID:isc_RestDataSource_6]
},
"willHandleError":true,
"serverOutputAsString":true,
"data":null
}

When I set data with dsRequest.setData(map), the data from the map ist there:
{
"actionURL":"riacsc/dispatch/ttw/delete",
"showPrompt":true,
"transport":"xmlHttpRequest",
"useSimpleHttp":true,
"promptStyle":"cursor",
"params":{
"aType":"2", <----
"anId":"Zeitraum I", <----
"_operationType":"remove",
"_dataSource":"isc_RestDataSource_6",
"isc_metaDataPrefix":"_",
"isc_dataFormat":"json"
},
"httpMethod":"POST",
"sendNoQueue":true,
"bypassCache":true,
"callback":{
"target":[RestDataSource ID:isc_RestDataSource_6]
},
"willHandleError":true,
"serverOutputAsString":true,
"data":null
}
updateData works w/o calling setData:
{
"actionURL":"riacsc/dispatch/ttw/update",
"showPrompt":true,
"transport":"xmlHttpRequest",
"useSimpleHttp":true,
"promptStyle":"cursor",
"params":{
"aType":"2", <----
"anId":"Zeitraum II", <----
"_operationType":"update",
"_dataSource":"isc_RestDataSource_7",
"isc_metaDataPrefix":"_",
"isc_dataFormat":"json"
},
"httpMethod":"POST",
"sendNoQueue":true,
"bypassCache":true,
"callback":{
"target":[RestDataSource ID:isc_RestDataSource_7]
},
"willHandleError":true,
"serverOutputAsString":true,
"data":null
}

[AloneAgainOr]

Problem solved. JavaDoc of removeData innocently states
"record - primary key values of record to delete, (or complete record)"

but the "real" documentation says
// if passed a full record, trim it down to primaryKeys.
// ...
meaning that if you don't have the primary keys of the DataSource set correctly, removeData will silently remove your record attributes.

I am beginning to doubt that RestDataSource is the way to go for me ...