refactor: add missing not null constraints to letter-sound assessment

#2191

Author: jo-elimu

src/main/java/ai/elimu/entity/analytics/LetterSoundAssessmentEvent.java

@@ -1,6 +1,7 @@
 package ai.elimu.entity.analytics;
 
 import jakarta.persistence.Entity;
+import jakarta.validation.constraints.NotNull;
 import lombok.Getter;
 import lombok.Setter;
 
@@ -12,11 +13,13 @@ public class LetterSoundAssessmentEvent extends AssessmentEvent {
     /**
      * The sequence of letters. E.g. <code>"sh"</code>.
      */
+    @NotNull
     private String letterSoundLetters;
 
     /**
      * The sequence of sounds (IPA values). E.g. <code>"ʃ"</code>.
      */
+    @NotNull
     private String letterSoundSounds;
 
     /**

src/main/java/ai/elimu/web/analytics/students/LetterSoundAssessmentEventsCsvExportController.java

@@ -47,12 +47,12 @@ public void handleRequest(
             "id",
             "timestamp",
             "package_name",
-            "letter_sound_letters",
-            "letter_sound_sounds",
-            "letter_sound_id",
             "mastery_score",
             "time_spent_ms",
-            "additional_data"
+            "additional_data",
+            "letter_sound_letters",
+            "letter_sound_sounds",
+            "letter_sound_id"
         )
         .build();
 
@@ -66,12 +66,12 @@ public void handleRequest(
           letterSoundAssessmentEvent.getId(),
           letterSoundAssessmentEvent.getTimestamp().getTimeInMillis(),
           letterSoundAssessmentEvent.getPackageName(),
-          letterSoundAssessmentEvent.getLetterSoundLetters(),
-          letterSoundAssessmentEvent.getLetterSoundSounds(),
-          letterSoundAssessmentEvent.getLetterSoundId(),
           letterSoundAssessmentEvent.getMasteryScore(),
           letterSoundAssessmentEvent.getTimeSpentMs(),
-          letterSoundAssessmentEvent.getAdditionalData()
+          letterSoundAssessmentEvent.getAdditionalData(),
+          letterSoundAssessmentEvent.getLetterSoundLetters(),
+          letterSoundAssessmentEvent.getLetterSoundSounds(),
+          letterSoundAssessmentEvent.getLetterSoundId()
       );
     }
     csvPrinter.flush();

src/main/resources/db/migration/2006047.sql

@@ -0,0 +1,4 @@
+# 2.6.47
+
+ALTER TABLE `LetterSoundAssessmentEvent` MODIFY `letterSoundLetters` VARCHAR(255) NOT NULL;
+ALTER TABLE `LetterSoundAssessmentEvent` MODIFY `letterSoundSounds` VARCHAR(255) NOT NULL;