How do you detect if an attribute like password has changed

Issue type:

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

Database system/driver:

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

I realise that this might be a noob question but i can’t find a reference in the docs. I am trying to a subscriber decorator to hash users password before persisting to the database.

In sequelizejs, I use the following code,

User.hashPassword = (user, options) => {
    if (!user.changed('password')) {
      return null;
    }
    // hash password
    return Bcrypt.hash(user.get('password'), SALT_ROUNDS)
      .then(hash => user.set('password', hash));
  };

Right now, my typeorm translation is roughly

@BeforeInsert()
@BeforeUpdate()
    hashPassword() {
        // conditional to detect if password has changed goes here
        this.password = bcrypt.hashSync(this.password, SALT_ROUNDS);
    }

Now, the issue is, I stuck at !user.changed('password'). Is there an equivalent function in typeorm to do this without rolling out my own solution?

[ssanusi]

just to update this thread

public username: string;

@Column()
public password: string;

@Column({ nullable: true })
public jwtToken: string;

private tempPassword: string;

public toString(): string {
    return `${this.username}`;
}

@AfterLoad()
private loadTempPassword(): void {
    this.tempPassword = this.password;
}

@BeforeUpdate()
private encryptPassword(): void {
    if (this.tempPassword !== this.password) {
       this.password = await this.hashPassword(this.password);
        this.loadTempPassword()
    }
}

[Chrisigrimm]

you can make a something like this

@PrimaryColumn() public username: string;

@Column()
public password: string;

@Column({ nullable: true })
public jwtToken: string;

private tempPassword: string;

public toString(): string {
    return `${this.username}`;
}

@AfterLoad()
private loadTempPassword(): void {
    this.tempPassword = this.password;
}

@BeforeUpdate()
private encryptPassword(): void {
    if (this.tempPassword !== this.password) {
        //
    }
}