import { AssociationMetadata } from './association';
export interface HasOneMetadata extends AssociationMetadata {
    foreignKey?: string;
    as?: string | {
        singular: string;
        plural: string;
    };
    onDelete?: 'SET NULL' | 'CASCADE';
}
export declare const ModelHasOneAssociationsSym: symbol;
export declare const HasOneMetadataSym: symbol;