bugfix

.idea/workspace.xml

@@ -4,11 +4,9 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="ce56effb-683b-43e9-9335-7e3aa5d26c29" name="Changes" comment="new window for grades">
+    <list default="true" id="ce56effb-683b-43e9-9335-7e3aa5d26c29" name="Changes" comment="grades can now be added for every course">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/gui/StudentCoursesController.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/gui/StudentCoursesController.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/gui/StudentGradesController.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/gui/StudentGradesController.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/model/Student.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/de/thdeg/grademanager/model/Student.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -179,7 +177,14 @@
       <option name="project" value="LOCAL" />
       <updated>1655904634462</updated>
     </task>
-    <option name="localTasksCounter" value="14" />
+    <task id="LOCAL-00014" summary="grades can now be added for every course">
+      <created>1655910063769</created>
+      <option name="number" value="00014" />
+      <option name="presentableId" value="LOCAL-00014" />
+      <option name="project" value="LOCAL" />
+      <updated>1655910063769</updated>
+    </task>
+    <option name="localTasksCounter" value="15" />
     <servers />
   </component>
   <component name="Vcs.Log.Tabs.Properties">
@@ -220,6 +225,7 @@
     <MESSAGE value="update for student courses and grades" />
     <MESSAGE value="clean up" />
     <MESSAGE value="new window for grades" />
-    <option name="LAST_COMMIT_MESSAGE" value="new window for grades" />
+    <MESSAGE value="grades can now be added for every course" />
+    <option name="LAST_COMMIT_MESSAGE" value="grades can now be added for every course" />
   </component>
 </project>
\ No newline at end of file

src/main/java/de/thdeg/grademanager/gui/StudentGradesController.java

@@ -9,12 +9,9 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
-import javafx.scene.control.Alert;
-import javafx.scene.control.ButtonType;
 import javafx.scene.control.ComboBox;
 
 import java.io.IOException;
-import java.util.Optional;
 import java.util.Set;
 
 public class StudentGradesController {
@@ -54,23 +51,21 @@ public class StudentGradesController {
             mark = markComboBox.getValue();
 
             Set<Enrollment> enrollments = student.getEnrollments();
-            for (Enrollment e: enrollments) {
-                if(course.getId() == e.getCourse().getId()){
+            for (Enrollment e : enrollments) {
+                if (course.getId() == e.getCourse().getId()) {
                     e.setGrade(mark.getMark());
 
                     JpaService jpaService = JpaService.getInstance();
-                    jpaService.runInTransaction(entityManager -> {entityManager.merge(e); return null;});
+                    jpaService.runInTransaction(entityManager -> {
+                        entityManager.merge(e);
+                        return null;
+                    });
                     initialize();
                 }
             }
-
-            SwitchWindowHelper.switchTo("Student Courses", event);
-        } else {
-            Alert alert = new Alert(Alert.AlertType.ERROR);
-            alert.setTitle("Fehler");
-            alert.setHeaderText("Bitte alle Felder ausfüllen.");
-            Optional<ButtonType> result = alert.showAndWait();
         }
+
+        SwitchWindowHelper.switchTo("Student Courses", event);
     }
 
     @FXML