fix OTM relationship being wrong

Author: kaleidox

src/main/java/de/kaleidox/workbench/model/jpa/representant/Customer.java

@@ -2,7 +2,7 @@
 
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
-import jakarta.persistence.OneToMany;
+import jakarta.persistence.ManyToMany;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -17,8 +17,8 @@
 @AllArgsConstructor
 @EqualsAndHashCode(of = "name")
 public class Customer {
-    @Id        String                 name;
-    @OneToMany Collection<Department> departments;
+    @Id         String                 name;
+    @ManyToMany Collection<Department> departments;
 
     public Optional<Department> findDepartment(String name) {
         return departments.stream().filter(department -> department.getName().equals(name)).findAny();

src/main/java/de/kaleidox/workbench/model/jpa/representant/Department.java

@@ -2,8 +2,6 @@
 
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
-import jakarta.persistence.Table;
-import jakarta.persistence.UniqueConstraint;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
@@ -14,7 +12,6 @@
 @NoArgsConstructor
 @AllArgsConstructor
 @EqualsAndHashCode(of = "name")
-@Table(uniqueConstraints = { @UniqueConstraint(columnNames = { "name", "customer_name" }) })
 public class Department {
     @Id String name;
 }