dmitrygavrish

function validateInSequence(
    ...validators: ( (formControl: FormControl) => any )[]
): (formControl: FormControl) => any {
    return function (formControl: FormControl): any {
        for (let i = 0; i < validators.length; i++) {
            const validationResult = validators[i](formControl);

            if (validationResult !== null) {
                return validationResult;
            }
        }

        return null;
    };
}

new FormControl('', [validateInSequence(Validators.required, Validators.email)]);

new Schema({
    id: {
        type: Number,
        unique: true,
        validate: {
          validator: value => typeof value === 'number',
          message: 'Invalid id type'
        },
    }
});

this._activatedRoute.paramMap.subscribe((params: ParamMap) => {
    let date: string = params.get('date'); 

    if (/*если дата неправильна*/) {
      date = ...; // изменим дату на корректную
      this._router.navigate(['/date', date]);
    }
  })