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https://issues.apache.org/jira/browse/OLINGO-931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15240528#comment-15240528
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Ramesh Reddy commented on OLINGO-931:
-------------------------------------
Because @odata.id can be different in few situations, but you can build using
the pattern like here at
https://github.com/apache/olingo-odata4/blob/master/lib/server-core-ext/src/main/java/org/apache/olingo/server/core/responses/EntityResponse.java#L177
which I use to build default entity id.
> $select does not work with JsonSerializer
> -----------------------------------------
>
> Key: OLINGO-931
> URL: https://issues.apache.org/jira/browse/OLINGO-931
> Project: Olingo
> Issue Type: Bug
> Components: odata4-server
> Affects Versions: (Java) V4 4.2.0
> Reporter: Anirban Das
> Assignee: Michael Bolz
>
> When we fire a Odata request whith $select and requested format as json
> for eg
> /Customer?$select=Type,CustomerName&$format=json
> The OdataSerializer throws a null pointer exception. Alson Note when
> requesting a xml format there is no issue with the request above and gives
> back the result correctly
> StackTrace for reference::
> java.lang.NullPointerException
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:329)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:273)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeExpandedNavigationProperty(ODataJsonSerializer.java:459)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeNavigationProperties(ODataJsonSerializer.java:420)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:332)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:273)
> at
> org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.entityCollection(ODataJsonSerializer.java:165)
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