Unique constraint isn't working properly

Issue type:

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

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [ x] postgres [ ] cockroachdb [ ] 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:

I’m new using typeorm and I’m having a trouble, I have created an entity that creates a user un my database, and also defined a unique constraint decorator an it still creating the user in my database when I test the Api with postman it doesn’t show any errors. user.entity.ts

@Entity()
@Unique(['username', 'ci'])
export class User extends BaseEntity {
    @PrimaryColumn()
    ci: string;

    @Column()
    username: string;

    @Column()
    @MinLength(8)
    password: string;

    @Column()
    role: UserRole;

}

user.repository.ts

async signUp(authUserDto: AuthUserDto): Promise<void> {
        const {ci, username, password} = authUserDto;

        const user = new User();
        user.ci = ci;
        user.username = username;
        user.password = password;
        user.role = UserRole.Admin;
        try {
            await user.save();
        } catch (error) {
            console.log(error.code);
        }
    }

[simplefeel]

@retorres9 I have the same error, How to fix it ?

[retorres9]

@pabagan to make a column unique you have to add somethin like this.

Column({unique: true})
columnName: string | number; //This is the name of the column you want to be unique