Function getCombinedErrorMessage

packages/core/src/i18n/i18nUtil.ts:130–152

(
  errors: ErrorObject[],
  et: ErrorTranslator,
  t: Translator,
  schema?: i18nJsonSchema,
  uischema?: UISchemaElement,
  path?: string
)

 * All errors must correspond to the given schema, uischema or path.
 */
export const getCombinedErrorMessage = (
  errors: ErrorObject[],
  et: ErrorTranslator,
  t: Translator,
  schema?: i18nJsonSchema,
  uischema?: UISchemaElement,
  path?: string
) => {
  if (errors.length > 0 && t) {
    // check whether there is a special message which overwrites all others
    const customErrorKey = getI18nKey(schema, uischema, path, 'error.custom');
    const specializedErrorMessage = t(customErrorKey, undefined, {
      schema,
      uischema,
      path,
      errors,
    });
    if (specializedErrorMessage !== undefined) {
      return specializedErrorMessage;
    }
  }
  return formatErrorMessage(errors.map((error) => et(error, t, uischema)));
};

/**
 * This can be used to internationalize the label of the given Labelable (e.g. UI Schema elements).