feat(customer): Introduce customer group (#6137)

**What**
Methods for:
- Bulk create customers
- Bulk and single create of customer groups
- Assigning customer <> group relationships
- listing of customers and customer groups

++ Uses new repository loading mechanism

packages/customer/src/models/customer-group-customer.ts

@@ -12,7 +12,7 @@ import {
 import Customer from "./customer"
 import CustomerGroup from "./customer-group"
 
-type OptionalGroupProps = DAL.EntityDateColumns // TODO: To be revisited when more clear
+type OptionalGroupProps = "customer_group" | "customer" | DAL.EntityDateColumns // TODO: To be revisited when more clear
 
 @Entity({ tableName: "customer_group_customer" })
 export default class CustomerGroupCustomer {
@@ -21,19 +21,27 @@ export default class CustomerGroupCustomer {
   @PrimaryKey({ columnType: "text" })
   id!: string
 
+  @Property({ columnType: "text" })
+  customer_id: string
+
+  @Property({ columnType: "text" })
+  customer_group_id: string
+
   @ManyToOne({
     entity: () => Customer,
-    fieldName: "customer__id",
+    fieldName: "customer_id",
     index: "IDX_customer_group_customer_customer_id",
+    nullable: true,
   })
-  customer: Customer
+  customer: Customer | null
 
   @ManyToOne({
     entity: () => CustomerGroup,
     fieldName: "customer_group_id",
     index: "IDX_customer_group_customer_group_id",
+    nullable: true,
   })
-  customer_group: CustomerGroup
+  customer_group: CustomerGroup | null
 
   @Property({ columnType: "jsonb", nullable: true })
   metadata: Record<string, unknown> | null = null
@@ -53,6 +61,9 @@ export default class CustomerGroupCustomer {
   })
   updated_at: Date
 
+  @Property({ columnType: "text", nullable: true })
+  created_by: string | null = null
+
   @BeforeCreate()
   onCreate() {
     this.id = generateEntityId(this.id, "cusgc")

packages/customer/src/models/customer-group.ts

@@ -34,6 +34,9 @@ export default class CustomerGroup {
   @Property({ columnType: "jsonb", nullable: true })
   metadata: Record<string, unknown> | null = null
 
+  @Property({ columnType: "text", nullable: true })
+  created_by: string | null = null
+
   @Property({
     onCreate: () => new Date(),
     columnType: "timestamptz",

packages/customer/src/models/customer.ts

@@ -71,7 +71,7 @@ export default class Customer {
   metadata: Record<string, unknown> | null = null
 
   @ManyToMany({
-    inversedBy: (group) => group.customers,
+    mappedBy: "customers",
     entity: () => CustomerGroup,
     pivotEntity: () => CustomerGroupCustomer,
   })