class-validator
Version:
Decorator-based property validation for classes.
31 lines • 1.36 kB
JavaScript
import { buildMessage, ValidateBy } from '../common/ValidateBy';
export const ARRAY_UNIQUE = 'arrayUnique';
/**
* Checks if all array's values are unique. Comparison for objects is reference-based.
* If null or undefined is given then this function returns false.
*/
export function arrayUnique(array, identifier) {
if (!Array.isArray(array))
return false;
if (identifier) {
array = array.map(o => (o != null ? identifier(o) : o));
}
const uniqueItems = array.filter((a, b, c) => c.indexOf(a) === b);
return array.length === uniqueItems.length;
}
/**
* Checks if all array's values are unique. Comparison for objects is reference-based.
* If null or undefined is given then this function returns false.
*/
export function ArrayUnique(identifierOrOptions, validationOptions) {
const identifier = typeof identifierOrOptions === 'function' ? identifierOrOptions : undefined;
const options = typeof identifierOrOptions !== 'function' ? identifierOrOptions : validationOptions;
return ValidateBy({
name: ARRAY_UNIQUE,
validator: {
validate: (value, args) => arrayUnique(value, identifier),
defaultMessage: buildMessage(eachPrefix => eachPrefix + "All $property's elements must be unique", options),
},
}, options);
}
//# sourceMappingURL=ArrayUnique.js.map