[OLINGO-1272] Select without primary key fails with JSON serializer but works fine with XML

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: (Java) V4 4.4.0
• Component/s: odata2-core, odata4-client, odata4-commons, odata4-server
• Flags: Important
• Assignee: Unassigned
• Reporter: Aarzoo Aggarwal
• Created: 25/Jun/18 12:57
• Updated: 02/Jul/18 10:54

Description

We create an entity with A primary key reference.

The request - http://ip:host/odata/entity?$select=key,col1,col2

The same request when tried with select query parameter having columns except the primary key like -

http://ip:host/odata/entity?$select=col1,col2 - stops working with json format.

Getting the same result works fine with request header set as - Accept=application/xml

It gives a null pointer exception with Accept=application/json with following trace -

java.lang.NullPointerException: null
at org.apache.olingo.server.core.uri.UriHelperImpl.findPropertyRefValue(UriHelperImpl.java:125)
at org.apache.olingo.server.core.uri.UriHelperImpl.buildKeyPredicate(UriHelperImpl.java:88)
at org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.getEntityId(ODataJsonSerializer.java:334)
at org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntity(ODataJsonSerializer.java:399)
at org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.writeEntitySet(ODataJsonSerializer.java:312)
at org.apache.olingo.server.core.serializer.json.ODataJsonSerializer.entityCollection(ODataJsonSerializer.java:198