Unique constraint not created on embedded entity field

[Nargonath]

Issue type:

[ ] question
[x] bug report
[ ] feature request
[ ] documentation issue

Database system/driver:

[ ] cordova
[ ] mongodb
[ ] mssql
[ ] mysql / mariadb
[ ] oracle
[x] postgres
[ ] sqlite
[ ] sqljs
[ ] react-native
[ ] expo

TypeORM version:

[x] latest
[ ] @next
[ ] 0.x.x (or put your version here)

Steps to reproduce or a small repository showing the problem:

export class Contact {
  @Column({ unique: true })
  email: string;
}

import { Contact } from './contact';

@Entity()
export class Person extends BaseEntity {
  @PrimaryGeneratedColumn()
  id: number;

  @Column(_type => Contact)
  contact: Contact;

  // I added the unique: true just for the sake of the example
  @Column({ default: StatusChoices.PENDING, unique: true })
  status: StatusChoices;
}

No unique constraint is created for the embedded entity field thus I can create 2 persons with the same email. Here are 2 screenshots from phpPgAdmin showing that the unique is created for status but not for contact.email:

[Nargonath]

Cool, thanks for the fix. 🎉