Drop Configurations correctly, reimplement OrderItem correctly

00-backend/src/main/java/de/htwsaar/webshop/repository/entities/Order.java

@@ -18,6 +18,6 @@ public class Order {
     @Column(name = "time")
     private Long time;
 
-    @OneToMany(mappedBy = "orderId")
+    @OneToMany(mappedBy = "order", fetch = FetchType.LAZY)
     private List<OrderItem> orderItems;
 }

00-backend/src/main/java/de/htwsaar/webshop/repository/entities/OrderItem.java

@@ -2,17 +2,23 @@ package de.htwsaar.webshop.repository.entities;
 
 import jakarta.persistence.*;
 import jakarta.validation.constraints.Min;
-import lombok.*;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
 import org.hibernate.annotations.OnDelete;
 
-import java.io.Serializable;
-
+@Getter
+@Setter
+@AllArgsConstructor
+@NoArgsConstructor
 @Entity
 @Table(name = "OrderItems")
 public class OrderItem {
 
-    @EmbeddedId
-    private OrderItemId id;
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
 
     @Column(nullable = false)
     @Min(value = 1, message = "Amount must be at least 1")
@@ -29,22 +35,4 @@ public class OrderItem {
     @JoinColumn(name = "articleId", referencedColumnName = "id", nullable = false)
     @OnDelete(action = org.hibernate.annotations.OnDeleteAction.SET_NULL)
     private Article article;
-
-    @ManyToOne(fetch = FetchType.LAZY)
-    @MapsId("articleConfId")
-    @JoinColumn(name = "articleConfId", referencedColumnName = "id")
-    @OnDelete(action = org.hibernate.annotations.OnDeleteAction.SET_NULL)
-    private ArticleConfiguration articleConfig;
-
-    @AllArgsConstructor
-    @NoArgsConstructor
-    @Getter
-    @Setter
-    @EqualsAndHashCode
-    @Embeddable
-    class OrderItemId implements Serializable {
-        private Long orderId;
-        private Long articleId;
-        private Long articleConfId;
-    }
 }

00-backend/src/main/resources/db/DBv3.sql

@@ -1 +1,20 @@
 DROP TABLE IF EXISTS ArticleConfigurations;
+
+DROP TABLE OrderItems;
+
+CREATE TABLE IF NOT EXISTS OrderItems
+(
+    id        INTEGER NOT NULL PRIMARY KEY, --composite pk was wrong
+    orderId   INTEGER NOT NULL,
+    articleId INTEGER NOT NULL,
+    amount    INTEGER NOT NULL,
+    -- art conf not needed
+
+    CONSTRAINT cAmount CHECK (amount > 0),
+    FOREIGN KEY (orderId) REFERENCES Orders (id)
+        ON DELETE CASCADE
+        ON UPDATE CASCADE,
+    FOREIGN KEY (articleId) REFERENCES Articles (id)
+        ON DELETE SET NULL
+        ON UPDATE CASCADE
+);