import { ValidationArguments, ValidationOptions, ValidatorConstraintInterface } from 'class-validator';
import { EntityManager } from '../../entity/manager';
export type IsUniqueOptions = ValidationOptions & {
    keys?: string[];
    sparse?: boolean;
    noIndex?: boolean;
};
export declare class IsUniqueConstraint implements ValidatorConstraintInterface {
    private em;
    private message;
    defaultMessage?(): string;
    validate(value: any, args: ValidationArguments): Promise<boolean>;
    setEm(em: EntityManager): IsUniqueConstraint;
}
//# sourceMappingURL=constraint.d.ts.map