trying to add order and order_product tables

with dtos, repositories and service

src/main/kotlin/com/github/dannecron/demo/models/CustomerLocal.kt

@@ -1,6 +1,6 @@
 package com.github.dannecron.demo.models
 
-data class CustomerLocal(val name: String, val city: City, val orders: List<Order>) {
+data class CustomerLocal(val name: String, val city: City, val orders: List<OrderLocal>) {
     /**
      * Return the most expensive product among all delivered products
      */

src/main/kotlin/com/github/dannecron/demo/models/Order.kt

@@ -1,3 +1,31 @@
 package com.github.dannecron.demo.models
 
-data class Order(val products: List<Product>, val isDelivered: Boolean)
+import com.github.dannecron.demo.services.serializables.OffsetDateTimeSerialization
+import com.github.dannecron.demo.services.serializables.UuidSerialization
+import kotlinx.serialization.Serializable
+import org.springframework.data.annotation.Id
+import org.springframework.data.relational.core.mapping.Column
+import org.springframework.data.relational.core.mapping.Table
+import java.time.OffsetDateTime
+import java.util.*
+
+@Table(value = "order")
+@Serializable
+data class Order(
+    @Id
+    val id: Long?,
+    @Serializable(with = UuidSerialization::class)
+    val guid: UUID,
+    val customerId: Long,
+    @Serializable(with = OffsetDateTimeSerialization::class)
+    @Column(value = "delivered_at")
+    val deliveredAt: OffsetDateTime?,
+    @Serializable(with = OffsetDateTimeSerialization::class)
+    @Column(value = "created_at")
+    val createdAt: OffsetDateTime,
+    @Serializable(with = OffsetDateTimeSerialization::class)
+    @Column(value = "updated_at")
+    val updatedAt: OffsetDateTime?
+) {
+    fun isDelivered(): Boolean = deliveredAt != null
+}

src/main/kotlin/com/github/dannecron/demo/models/OrderLocal.kt

@@ -0,0 +1,3 @@
+package com.github.dannecron.demo.models
+
+data class OrderLocal(val products: List<Product>, val isDelivered: Boolean)

src/main/kotlin/com/github/dannecron/demo/models/OrderProduct.kt

@@ -0,0 +1,41 @@
+package com.github.dannecron.demo.models
+
+import com.github.dannecron.demo.services.serializables.OffsetDateTimeSerialization
+import com.github.dannecron.demo.services.serializables.UuidSerialization
+import kotlinx.serialization.Serializable
+import org.springframework.data.annotation.Id
+import org.springframework.data.annotation.Transient
+import org.springframework.data.domain.Persistable
+import org.springframework.data.relational.core.mapping.Column
+import org.springframework.data.relational.core.mapping.Table
+import java.time.OffsetDateTime
+import java.util.*
+
+@Table(value = "order_product")
+@Serializable
+data class OrderProduct(
+    @Id
+    @Serializable(with = UuidSerialization::class)
+    val guid: UUID,
+    @Column(value = "order_id")
+    val orderId: Long,
+    @Column(value = "product_id")
+    val productId: Long,
+    @Serializable(with = OffsetDateTimeSerialization::class)
+    @Column(value = "created_at")
+    val createdAt: OffsetDateTime,
+    @Serializable(with = OffsetDateTimeSerialization::class)
+    @Column(value = "updated_at")
+    val updatedAt: OffsetDateTime?,
+): Persistable<UUID> {
+    @Transient
+    var isNewInstance: Boolean? = null
+
+    override fun getId(): UUID {
+        return guid
+    }
+
+    override fun isNew(): Boolean {
+        return isNewInstance ?: true
+    }
+}