Start moving data server handling from pinia store to server

software/backend/models/ordering/ticket.model.ts

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+import { Model, BelongsTo, Column, ForeignKey, HasMany, HasOne, Table } from "sequelize-typescript";
+import { Concert } from "../acts/concert.model";
+import { Order } from "./order.model";
+import { Seat } from "../locations/seat.model";
+
+@Table({ timestamps: false })
+export class Ticket extends Model {
+  @Column
+  @ForeignKey(() => Order)
+  orderId: number
+
+  @Column
+  orderPrice: number
+
+  @Column
+  @ForeignKey(() => Concert)
+  concertId: number
+
+  @Column
+  @ForeignKey(() => Seat)
+  seatId: number
+
+
+  // Relations
+  @BelongsTo(() => Order)
+  order: Order
+
+  @BelongsTo(() => Concert)
+  product: Concert
+
+  @BelongsTo(() => Seat)
+  seat: Seat
+}