[CAUSEWAY-1937] NPE when render domain entity for first time that has contributed action on contributed collection.

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.16.2
• Fix Version/s: 2.0.0-M8
• Component/s: Viewer Wicket
• Assignee: Andi Huber
• Reporter: Daniel Keir Haywood
• Created: 26/Apr/18 05:54
• Updated: 29/Apr/22 13:30
• Resolved: 29/Apr/22 13:30

Description

for example

https://github.com/danhaywood/busydevtutorial

in Pets.layout.xml, remove the "visits" collection to reproduce.  The contributed Pet_bookVisit action causes the issue because its "owner" is not declared and so returns null.

 

Caused by: java.lang.NullPointerException
at org.apache.isis.core.metamodel.services.grid.bootstrap3.GridSystemServiceBS3.addActionTo(GridSystemServiceBS3.java:661)
at org.apache.isis.core.metamodel.services.grid.bootstrap3.GridSystemServiceBS3.validateAndNormalize(GridSystemServiceBS3.java:529)
at org.apache.isis.core.metamodel.services.grid.GridSystemServiceAbstract.normalize(GridSystemServiceAbstract.java:165)
at org.apache.isis.core.metamodel.services.grid.GridServiceDefault.normalize(GridServiceDefault.java:102)
at org.apache.isis.core.metamodel.facets.object.grid.GridFacetDefault.load(GridFacetDefault.java:75)
at org.apache.isis.core.metamodel.facets.object.grid.GridFacetDefault.getGrid(GridFacetDefault.java:65)
at org.apache.isis.viewer.wicket.ui.components.collectioncontents.ajaxtable.CollectionContentsAsAjaxTablePanel.addPropertyColumnsIfRequired(CollectionContentsAsAjaxTablePanel.java:170)
at org.apache.isis.viewer.wicket.ui.components.collectioncontents.ajaxtable.CollectionContentsAsAjaxTablePanel.buildGui(CollectionContentsAsAjaxTablePanel.java:102)
at org.apache.isis.viewer.wicket.ui.components.collectioncontents.ajaxtable.CollectionContentsAsAjaxTablePanel.onInitialize(CollectionContentsAsAjaxTablePanel.java:80)
at org.apache.wicket.Component.fireInitialize(Component.java:878)
at org.apache.wicket.MarkupContainer.internalInitialize(MarkupContainer.java:1070)
at org.apache.wicket.MarkupContainer.addedComponent(MarkupContainer.java:1047)
at org.apache.wicket.MarkupContainer.add(MarkupContainer.java:241)
at org.apache.wicket.MarkupContainer.addOrReplace(MarkupContainer.java:265)
at