fix: add revised migration

src/entities/Link.ts

@@ -4,27 +4,44 @@ import { User } from "./User"
 @Entity("links")
 export class Link {
 
+	// Unique link id.
 	@PrimaryGeneratedColumn()
 	id: number
 
+	// Experimental: subdomain which should be a part of the short url.
+	// For instance in the URL "abc.example.com/def", abc is the subdomain.
+	// "def.example.com/def" won't resolve to the URL that "abc.example.com/def" does.
 	@Column({ nullable: true })
 	subdomain: string | null
 
+	// Shortened Uri.
 	@Column()
 	shortUri: string
 
+	// URL to which the user should be redirected
 	@Column()
 	fullUrl: string
 
-	@Column()
-	role: string
-
+	// Unix timestamp of link creation date.
 	@Column('bigint')
 	createDate: number
 
-	@Column('bigint')
-	expiryDate: number
+	// Unix timestamp of when the link should expire.
+	// If null, the link will never expire unless deleted.
+	@Column('bigint', { nullable: true })
+	expiryDate: number | null
 
+	// Aggregated amount of visits.
+	@Column('bigint')
+	visits: number
+
+	// Link privacy:
+	// - true, if link is private
+	// - false, if link can be shown in a list of recent links publicly.
+	@Column()
+	privacy: boolean
+
+	// User to which the shortened URL belongs.
 	@ManyToOne(() => User, (user) => user.links, { nullable: true })
 	@JoinTable()
 	author: User | null

src/entities/User.ts

@@ -4,21 +4,29 @@ import { Link } from "./Link"
 @Entity("users")
 export class User {
 
+	// Unique user id.
 	@PrimaryGeneratedColumn()
 	id: number
 
+	// User name, must be unique.
 	@Column({ unique: true })
 	name: string
 
+	// Salted password hash.
 	@Column()
 	passwordHash: string
 
+	// User role:
+	// - 0 - means unprivileged user,
+	// - 1 - means administrative user.
 	@Column()
-	role: string
+	role: number
 
+	// Account creation date as a Unix timestamp.
 	@Column('bigint')
 	createdAt: number
 
+	// List of shortened URLs which belong to the user.
 	@OneToMany(() => Link, (link) => link.author)
 	links: Link[];
 }

src/migrations/1764549652720-initialMigration.ts

@@ -1,49 +0,0 @@
-import { MigrationInterface, QueryRunner } from "typeorm";
-
-export class InitialMigration1764549652720 implements MigrationInterface {
-    name = 'InitialMigration1764549652720'
-
-    public async up(queryRunner: QueryRunner): Promise<void> {
-        await queryRunner.query(`
-            CREATE TABLE "links" (
-                "id" SERIAL NOT NULL,
-                "subdomain" character varying,
-                "shortUri" character varying NOT NULL,
-                "fullUrl" character varying NOT NULL,
-                "role" character varying NOT NULL,
-                "createDate" bigint NOT NULL,
-                "expiryDate" bigint NOT NULL,
-                "authorId" integer,
-                CONSTRAINT "PK_ecf17f4a741d3c5ba0b4c5ab4b6" PRIMARY KEY ("id")
-            )
-        `);
-        await queryRunner.query(`
-            CREATE TABLE "users" (
-                "id" SERIAL NOT NULL,
-                "name" character varying NOT NULL,
-                "passwordHash" character varying NOT NULL,
-                "role" character varying NOT NULL,
-                "createdAt" bigint NOT NULL,
-                CONSTRAINT "UQ_51b8b26ac168fbe7d6f5653e6cf" UNIQUE ("name"),
-                CONSTRAINT "PK_a3ffb1c0c8416b9fc6f907b7433" PRIMARY KEY ("id")
-            )
-        `);
-        await queryRunner.query(`
-            ALTER TABLE "links"
-            ADD CONSTRAINT "FK_c5287c1e74cbb62159104715543" FOREIGN KEY ("authorId") REFERENCES "users"("id") ON DELETE NO ACTION ON UPDATE NO ACTION
-        `);
-    }
-
-    public async down(queryRunner: QueryRunner): Promise<void> {
-        await queryRunner.query(`
-            ALTER TABLE "links" DROP CONSTRAINT "FK_c5287c1e74cbb62159104715543"
-        `);
-        await queryRunner.query(`
-            DROP TABLE "users"
-        `);
-        await queryRunner.query(`
-            DROP TABLE "links"
-        `);
-    }
-
-}