setup database, entities, and migrations

src/database/entities/country.entity.ts

@@ -0,0 +1,40 @@
+import { City } from "@/database/entities/city.entity";
+import {
+	Collection,
+	Entity,
+	OneToMany,
+	PrimaryKey,
+	Property,
+	Unique,
+} from "@mikro-orm/core";
+
+@Entity()
+export class Country {
+	@PrimaryKey({ type: "varchar", length: 30 })
+	id!: string;
+
+	@Property({ type: "varchar", length: 200 })
+	@Unique()
+	slug!: string;
+
+	@Property({ type: "varchar", length: 100 })
+	name!: string;
+
+	@Property({
+		type: "timestamp",
+		onCreate: () => new Date(),
+	})
+	createdAt!: Date;
+
+	@Property({
+		type: "timestamp",
+		onCreate: () => new Date(),
+		onUpdate: () => new Date(),
+	})
+	updatedAt!: Date;
+
+	// Collections
+
+	@OneToMany(() => City, (city) => city.country)
+	cities = new Collection<City>(this);
+}