class-validator-extended/dist/map/map-unique-keys/map-unique-keys.decorator.js

Additional validators for class-validator.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.MAP_UNIQUE_KEYS = void 0;
exports.MapUniqueKeys = MapUniqueKeys;
const class_validator_1 = require("class-validator");
const map_unique_keys_predicate_1 = require("./map-unique-keys.predicate");
/** @hidden */
exports.MAP_UNIQUE_KEYS = 'mapUniqueKeys';
/**
 * Checks if the given value is a [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map)
 * whose keys are all unique with regard to the given projection.
 *
 * #### Example
 * ```typescript
 * // Ensure there are no duplicate user ids in the map.
 * @MapUniqueKeys<User>(user => user.id)
 * postsByUser: Map<User, Post[]>
 * ```
 *
 * @category Map
 * @param projection The function mapping each key to the value that is used for the uniqueness check.
 * @param options Generic class-validator options.
 * @typeParam Key The type of the map's keys.
 * @typeParam Projection The type returned by `projection`.
 */
function MapUniqueKeys(projection, options) {
    return (0, class_validator_1.ValidateBy)({
        name: exports.MAP_UNIQUE_KEYS,
        validator: {
            validate: (value, _arguments) => (0, map_unique_keys_predicate_1.mapUniqueKeys)(value, projection),
            defaultMessage: (0, class_validator_1.buildMessage)(eachPrefix => `${eachPrefix}$property must have unique keys`, options),
        },
    }, options);
}