Tobias Niehues created OLINGO-1374:
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Summary: Include "target" in error response caused by exceptions
(ODataLibraryException, DeserializerException)
Key: OLINGO-1374
URL: https://issues.apache.org/jira/browse/OLINGO-1374
Project: Olingo
Issue Type: Improvement
Components: odata4-server
Affects Versions: (Java) V4 4.6.0
Reporter: Tobias Niehues
Error responses should include error codes and target to enable user interfaces
to tie validation errors to the related interface element.
For example: The xml and json implementations of ODataDeserializer throw
DeserializerExceptions and include the offending property in the error message.
However, this information does not get propagated to the error handler.
See:
[https://github.com/apache/olingo-odata4/blob/master/lib/server-core/src/main/java/org/apache/olingo/server/core/ODataHandlerImpl.java#L81-L125]
DeserializerException is converted to ODataServerError, but it is not setting
the ODataServerError.target attribute. This results in error messages like:
```
{"error":\{"code":null,"message":"Property: Type must not be null."}}
```
As it is, I find it hard to customize error handling as it is now. There is no
nice way to replace ODataExceptionHelper, for example.
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