applied stack overflow feedback #https://stackoverflow.com/questions/…

…77943523 and the @onetomany and @manytoone now compiles. realizing now that even my Ape @OnetoOne example wasn't binding correctly in the grid view, I've made several attempts and it now binds to read the value, but not to save the value.  Also, favoriteBatColor does not save the value from the ComboBox, and I would like to combo box to populate from the colors of existing bats, I suspect that I will need to add logic to the Service but even the SamplePersonService does not have a clear path to all bats, so for now i have a hard coded set of colors that do show in the combobox

src/main/java/com/example/application/data/Bat.java

@@ -17,6 +17,9 @@ public class Bat extends AbstractEntity {
 
 	private String color;
 
+    @JsonBackReference
+    @ManyToOne
+    @JoinColumn(name = "zookeeper")
     private SamplePerson zooKeeper;
     public String getColor() {
         return color;
@@ -25,9 +28,7 @@ public void setColor(String value) {
         this.color = value;
     }
 
-    @JsonBackReference
-    @ManyToOne
-    @JoinColumn(name = "SAMPlE_PERSON_ID", referencedColumnName = "SAMPLE_PERSON_ID", nullable = false)
+
     public SamplePerson getZooKeeper() {
         return zooKeeper;
     }

src/main/java/com/example/application/data/SamplePerson.java

@@ -4,6 +4,8 @@
 import jakarta.persistence.*;
 import jakarta.validation.constraints.Email;
 import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Set;
 
 @Entity
@@ -13,8 +15,11 @@ public class SamplePerson extends AbstractEntity {
     @JoinColumn(name="ape")
     private Ape ape;
 
-
+    @JsonManagedReference
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "zooKeeper")
     private Set<Bat> bats;
+
+    private String favoriteBatColor;
     private String c;
     private String d;
     private String e;
@@ -26,14 +31,19 @@ public void setApe(Ape value) {
         this.ape = value;
     }
 
-    @JsonManagedReference
-    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "zooKeeper")
+
     public Set<Bat> getBats() {
         return bats;
     }
     public void setBats(Set<Bat> value) {
         this.bats = value;
     }
+    public String getFavoriteBatColor(){
+        return favoriteBatColor;
+    }
+    public void setFavoriteBatColor(String value){
+        this.favoriteBatColor = value;
+    }
     public String getC() {
         return c;
     }

src/main/java/com/example/application/services/SamplePersonService.java

@@ -2,6 +2,8 @@
 
 import com.example.application.data.SamplePerson;
 import com.example.application.data.SamplePersonRepository;
+
+import java.util.List;
 import java.util.Optional;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;

src/main/java/com/example/application/views/masterdetail/MasterDetailView.java

@@ -7,6 +7,7 @@
 import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.button.ButtonVariant;
 import com.vaadin.flow.component.checkbox.Checkbox;
+import com.vaadin.flow.component.combobox.ComboBox;
 import com.vaadin.flow.component.datepicker.DatePicker;
 import com.vaadin.flow.component.dependency.Uses;
 import com.vaadin.flow.component.formlayout.FormLayout;
@@ -42,8 +43,8 @@ public class MasterDetailView extends Div implements BeforeEnterObserver {
 
     private final Grid<SamplePerson> grid = new Grid<>(SamplePerson.class, false);
 
-    private TextField apeColor;
-    private TextField batColors;
+    private TextField ape_color;
+    private ComboBox<String> batColors;
     private TextField c;
     private TextField d;
     private TextField e;
@@ -71,7 +72,7 @@ public MasterDetailView(SamplePersonService samplePersonService) {
 
         // Configure Grid
         grid.addColumn("ape.color").setHeader("Ape Color").setAutoWidth(true);
-        grid.addColumn("b").setAutoWidth(true);
+        grid.addColumn("favoriteBatColor").setAutoWidth(true);
         grid.addColumn("c").setAutoWidth(true);
         grid.addColumn("d").setAutoWidth(true);
         grid.addColumn("e").setAutoWidth(true);
@@ -95,6 +96,10 @@ public MasterDetailView(SamplePersonService samplePersonService) {
         // Configure Form
         binder = new BeanValidationBinder<>(SamplePerson.class);
 
+        binder.bind(ape_color,
+                samplePerson -> samplePerson.getApe().getColor(),
+                (samplePerson, value) -> samplePerson.getApe().setColor(value));
+
         // Bind fields. This is where you'd define e.g. validation rules
 
         binder.bindInstanceFields(this);
@@ -154,12 +159,14 @@ private void createEditorLayout(SplitLayout splitLayout) {
         editorLayoutDiv.add(editorDiv);
 
         FormLayout formLayout = new FormLayout();
-        apeColor = new TextField("Ape Color");
-        batColors = new TextField("Bat Colors");
+        ape_color = new TextField("Ape Color");
+        batColors = new ComboBox<>("Bat Colors");
         c = new TextField("c");
         d = new TextField("d");
         e = new TextField("e");
-        formLayout.add(apeColor, batColors, c, d, e);
+        batColors.setItems("black","brown","white","blue","red");
+
+        formLayout.add(ape_color, batColors, c, d, e);
 
         editorDiv.add(formLayout);
         createButtonLayout(editorLayoutDiv);

src/main/resources/data.sql

@@ -1,4 +1,5 @@
 insert into ape(version, id, color) values (1, 1, 'apricot')
+insert into sample_person(version, id, ape, c, d, e) values (1, 1, 1, 'c', 'd', 'e')
 insert into bat(version, id, color, zooKeeper) values (1, 1, 'brown', 1)
-insert into bat(version, id, color, zooKeeper) values (1, 1, 'blue', 1)
-insert into sample_person(version, id, ape, bats, c, d, e) values (1, 1, 1, ARRAY [1, 2], 'c', 'd', 'e')
+insert into bat(version, id, color, zooKeeper) values (1, 2, 'blue', 1)
+