Re-fix Curation Status bug

doc/release-notes/11685-CurationStatus_fix.md

@@ -0,0 +1,6 @@
+The updates to support keeping the history of curation status labels added in #11268
+will incorrectly show curation statuses added prior to v6.7 as the current one, regardless of 
+whether newer statuses exist. This PR corrects the problem.
+
+(As a work-around for 6.7 admins can add createtime dates (must be prior to when 6.7 was installed) to the curationstatus table
+ for entries that have null createtimes. The code fix in this version properly handles null dates as indicating older/pre v6.7 curationstatuses.)

src/main/java/edu/harvard/iq/dataverse/DatasetVersion.java

@@ -216,6 +216,10 @@ public enum VersionState {
     @OneToMany(mappedBy = "datasetVersion", cascade={CascadeType.REMOVE, CascadeType.MERGE, CascadeType.PERSIST})
     private List<WorkflowComment> workflowComments;
 
+    /*
+     * As of v6.7, the NULLS LAST part of the annotation below appears to not be working. Explicit sorting has been added in the getCurationStatuses() method. The annotation is kept since, if it does work
+     * in the future, it is presumably more efficient that sorting in our code.
+     */
     @OneToMany(mappedBy = "datasetVersion", cascade = CascadeType.ALL, orphanRemoval = true)
     @OrderBy("createTime DESC NULLS LAST")
     private List<CurationStatus> curationStatuses = new ArrayList<>();
@@ -2159,6 +2163,18 @@ public String getLocaleLastUpdateTime() {
 
     // Add methods to manage curationLabels
     public List<CurationStatus> getCurationStatuses() {
+        // Sort the list to ensure null createTime values appear last
+        /*
+         * Note that the ORDER DESC NULLS LAST annotation on this list should sort this way,
+         * but, as of v6.7, the NULLS LAST aspect is not working.
+         * The code here assured both the DESC order and NULLS LAST.
+         */
+        if (curationStatuses != null) {
+            curationStatuses.sort(Comparator.comparing(
+                CurationStatus::getCreateTime,
+                Comparator.nullsLast(Comparator.reverseOrder())
+            ));
+        }
         return curationStatuses;
     }