some filters do not work with each other, addFilterCriterion error for certain mixes

[smutniak]

Following a filter on Status with one for Last Name throws 500 error. Filtering on Last Name followed by a filter on Status does not. Following the Last Name filter with a Status filter followed by a Graduation Semester (List) filter does throw an error.

[cstarcher]

java.lang.NullPointerException: null
at org.tdl.vireo.controller.SubmissionListController.addFilterCriterion(SubmissionListController.java:237) ~[classes/:na]
at org.tdl.vireo.controller.SubmissionListController$$FastClassBySpringCGLIB$$36c0d017.invoke() ~[classes/:na]

[smutniak]

While this ticket does have somewhat of a workaround it is the most frequent issue I get zendesk tickets for. Can the priority be bumped up a bit for the next sprint?

[jsavell]

@smutniak Could you test this branch to see if it resolves this issue?

https://github.com/TAMULib/Vireo/tree/predicate-null-check

It sounds similar to something I was working on based on local issue reports.