fix: dataElementIdScheme should not filter events DHIS2-14968

dhis-2/dhis-services/dhis-service-tracker/src/main/java/org/hisp/dhis/tracker/export/event/JdbcEventStore.java

@@ -650,7 +650,6 @@ lateral jsonb_each(
     ) as eventdatavalue(dataelement_uid, value)
     on true
 left join dataelement de on de.uid = eventdatavalue.dataelement_uid
-where eventdatavalue.dataelement_uid is not null
 """);
     }
 

dhis-2/dhis-support/dhis-support-test/src/main/java/org/hisp/dhis/test/utils/Assertions.java

@@ -127,6 +127,17 @@ public static void assertIsEmpty(Collection<?> actual) {
     assertTrue(actual.isEmpty(), actual.toString());
   }
 
+  /**
+   * Asserts that the given collection is not null and empty.
+   *
+   * @param actual the collection.
+   * @param message fails with this message
+   */
+  public static void assertIsEmpty(Collection<?> actual, String message) {
+    assertNotNull(actual, message);
+    assertTrue(actual.isEmpty(), message);
+  }
+
   /**
    * Asserts that the given collection is not null and not empty.
    *

dhis-2/dhis-test-web-api/src/test/java/org/hisp/dhis/webapi/controller/tracker/export/IdSchemeExportControllerTest.java

@@ -29,6 +29,7 @@
 
 import static org.hisp.dhis.test.utils.Assertions.assertContains;
 import static org.hisp.dhis.test.utils.Assertions.assertContainsOnly;
+import static org.hisp.dhis.test.utils.Assertions.assertIsEmpty;
 import static org.hisp.dhis.test.utils.Assertions.assertNotEmpty;
 import static org.hisp.dhis.test.webapi.Assertions.assertWebMessage;
 import static org.junit.jupiter.api.Assertions.assertAll;
@@ -75,6 +76,7 @@
 import org.hisp.dhis.webapi.controller.tracker.JsonEvent;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInstance;
 import org.junit.jupiter.api.function.Executable;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -149,6 +151,7 @@ void setUpUser() {
   @MethodSource(value = "shouldExportMetadataUsingGivenIdSchemeProvider")
   void shouldExportMetadataUsingGivenIdScheme(TrackerIdSchemeParam idSchemeParam) {
     Event event = get(Event.class, "QRYjLTiJTrA");
+    assertNotEmpty(event.getEventDataValues(), "test expects an event with data values");
 
     // maps JSON fields to idScheme request parameters
     Map<String, String> idSchemeRequestParams =
@@ -266,6 +269,19 @@ void shouldExportMetadataUsingGivenIdScheme(TrackerIdSchemeParam idSchemeParam)
     assertMetadataIdScheme(metadata, actual, idSchemeParam, "event");
   }
 
+  @Test
+  void shouldExportEventUsingNonUIDDataElementIdSchemeEvenIfItHasNoDataValues() {
+    Event event = get(Event.class, "jxgFyJEMUPf");
+    assertIsEmpty(event.getEventDataValues(), "test expects an event with no data values");
+
+    JsonEvent actual =
+        GET("/tracker/events/{id}?fields=event,dataValues&dataElementIdScheme=NAME", event.getUid())
+            .content(HttpStatus.OK)
+            .as(JsonEvent.class);
+
+    assertEquals("jxgFyJEMUPf", actual.getEvent());
+  }
+
   @ParameterizedTest
   @ValueSource(strings = {"/{id}?", "?events={id}&paging=true&", "?events={id}&paging=false&"})
   void shouldReportMetadataWhichDoesNotHaveAnIdentifierForGivenIdScheme(String urlPortion) {