ZOD-341-Add unique constraint to user email and clean up duplicates

src/db/migrations/1761032305682-AddUniqueConstraintToUserEmail.ts

@@ -0,0 +1,26 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class AddUniqueConstraintToUserEmail1761032305682 implements MigrationInterface {
+    name = 'AddUniqueConstraintToUserEmail1761032305682'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        // Clean up duplicate emails - keep the oldest record (MIN id)
+        await queryRunner.query(`
+            DELETE FROM users
+            WHERE id IN (
+                SELECT u1.id
+                FROM users u1
+                INNER JOIN users u2 ON u1.email = u2.email AND u1.id > u2.id
+                WHERE u1.email IS NOT NULL
+            )
+        `);
+        
+        // Add unique constraint
+        await queryRunner.query(`ALTER TABLE "users" ADD CONSTRAINT "UQ_97672ac88f789774dd47f7c8be3" UNIQUE ("email")`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "users" DROP CONSTRAINT "UQ_97672ac88f789774dd47f7c8be3"`);
+    }
+
+}

src/db/migrations/index.ts

@@ -5,3 +5,4 @@ export * from './1757349525708-create-money-requests-table';
 export * from './1757433339849-add-reservation-amount-to-account-entity';
 export * from './1757915357218-add-deleted-at-column-to-junior';
 export * from './1760869651296-AddMerchantInfoToTransactions';
+export * from './1761032305682-AddUniqueConstraintToUserEmail';

src/user/entities/user.entity.ts

@@ -28,7 +28,7 @@ export class User extends BaseEntity {
   @Column('varchar', { length: 255, name: 'last_name', nullable: false })
   lastName!: string;
 
-  @Column('varchar', { length: 255, name: 'email', nullable: true })
+  @Column('varchar', { length: 255, name: 'email', nullable: true, unique: true })
   email!: string;
 
   @Column('varchar', { length: 255, name: 'phone_number', nullable: true })

src/user/services/user.service.ts

@@ -222,7 +222,7 @@ export class UserService {
   }
 
   async updateUserEmail(userId: string, email: string) {
-    const userWithEmail = await this.findUser({ email, isEmailVerified: true });
+    const userWithEmail = await this.findUser({ email });
 
     if (userWithEmail) {
       if (userWithEmail.id === userId) {