Javascript restanglar:setRequestSuffix（）未设置全局后缀

我正在使用Restanglar，希望为我的请求设置后缀。当我在本地执行此操作时，在我的服务中发出请求之前，它正在工作，但我希望在全局范围内进行设置

问题是，当我在.config中设置它时，它不起作用。baseUrl正在工作，但仍缺少后缀。你知道我在做什么吗

angular.module('app').config(function(RestangularProvider) {
    RestangularProvider.setBaseUrl("/api");

    // This function is used to map the JSON data to something Restangular
    // expects for the paginated results
    RestangularProvider.setResponseExtractor(function(response, operation, what, url) {
        if (operation === "getList" && response.results) {
            // Use results as the return type, and save the result metadata
            // in _resultmeta
            var newResponse = response.results;
            newResponse._resultmeta = {
                "count": response.count,
                "next": response.next,
                "previous": response.previous
            };
            return newResponse;
        }

        return response;
    });

    //RestangularProvider.setRequestSuffix('peshooo');
    RestangularProvider.setRequestSuffix('.json');
});