add maintenance model, factory and service

src/entity/unit/maintenance.ts

@@ -0,0 +1,56 @@
+import { Column, CreateDateColumn, Entity, ManyToOne, OneToMany, PrimaryGeneratedColumn } from "typeorm";
+import { equipment } from "./equipment/equipment";
+import { wearable } from "./wearable/wearable";
+import { vehicle } from "./vehicle/vehicle";
+import { damageReport } from "./damageReport";
+
+@Entity()
+export class maintenance {
+  @PrimaryGeneratedColumn("uuid")
+  id: string;
+
+  @CreateDateColumn()
+  createdAt: Date;
+
+  @Column({ type: "varchar", length: 255 })
+  status: string;
+
+  @Column({ type: "boolean", default: false })
+  done: boolean;
+
+  @Column({ type: "text" })
+  description: string;
+
+  @Column({ nullable: true, default: null })
+  equipmentId?: string;
+
+  @Column({ nullable: true, default: null })
+  vehicleId?: string;
+
+  @Column({ nullable: true, default: null })
+  wearableId?: string;
+
+  @ManyToOne(() => equipment, {
+    nullable: true,
+    onDelete: "CASCADE",
+    onUpdate: "RESTRICT",
+  })
+  equipment?: equipment;
+
+  @ManyToOne(() => vehicle, {
+    nullable: true,
+    onDelete: "CASCADE",
+    onUpdate: "RESTRICT",
+  })
+  vehicle?: vehicle;
+
+  @ManyToOne(() => wearable, {
+    nullable: true,
+    onDelete: "CASCADE",
+    onUpdate: "RESTRICT",
+  })
+  wearable?: wearable;
+
+  @OneToMany(() => damageReport, (dr) => dr.maintenance)
+  reports: damageReport[];
+}