queryParameters 不支持数组

[MinuteReversal]

https://github.com/flutterchina/dio#request-options
帮助文档上是说可以传入Iterable
以下为dio调用

///从标签下删除用户
Future<void> labelMgtDeleteUsersFromLabel(int labelId,List userIds) async {
   await dio.delete(labelMgtDeleteUsersFromLabelUrl,queryParameters:{'labelId':labelId,'userIds':userIds});
}

调用上面的删除用户业务

test(
  '批量删除',
  () async {
    await labelMgtDeleteUsersFromLabel(20, ['3', '5']);
  },
  timeout: Timeout.none,
);

服务器没有接收到数组参数userIds。

{"input":{"labelId":20,"userIds":[]}}

服务器要求数组的querystring的格式如下

qs.stringify({ a: ['b', 'c'] }, { arrayFormat: 'repeat' })
// 'a=b&a=c'

请实现数组序列化为querystring，实现标准可以参考qs库。
qs库地址如下,详见arrayFormat。可以使用ctrl+F查找arrayFormat。
https://www.npmjs.com/package/qs

[MinuteReversal]

需要替换 RequestOptions

代码如下：

import 'package:dio/dio.dart';

const serverAddress = 'http://your.server.address:prot';

///fix query string
class FixQueryStringRequestOptions extends RequestOptions {
  FixQueryStringRequestOptions({
    String method,
    int sendTimeout,
    int receiveTimeout,
    int connectTimeout,
    dynamic data,
    String path,
    Map<String, dynamic> queryParameters,
    String baseUrl,
    void Function(int, int) onReceiveProgress,
    void Function(int, int) onSendProgress,
    CancelToken cancelToken,
    Map<String, dynamic> extra,
    Map<String, dynamic> headers,
    ResponseType responseType,
    String contentType,
    ValidateStatus validateStatus,
    bool receiveDataWhenStatusError = true,
    bool followRedirects = true,
    int maxRedirects,
    RequestEncoder requestEncoder,
    ResponseDecoder responseDecoder,
  }) : super(
          method: method,
          sendTimeout: sendTimeout,
          receiveTimeout: receiveTimeout,
          connectTimeout: connectTimeout,
          data: data,
          path: path,
          queryParameters: queryParameters,
          baseUrl: baseUrl,
          onReceiveProgress: onReceiveProgress,
          onSendProgress: onSendProgress,
          cancelToken: cancelToken,
          extra: extra,
          headers: headers,
          responseType: responseType,
          contentType: contentType,
          validateStatus: validateStatus,
          receiveDataWhenStatusError: receiveDataWhenStatusError,
          followRedirects: followRedirects,
          maxRedirects: maxRedirects,
          requestEncoder: requestEncoder,
          responseDecoder: responseDecoder,
        );

  /// here is important
  ///
  ///
  @override
  Uri get uri {
    final Uri _url = Uri.parse(baseUrl + path);

    return new Uri(
      scheme: _url.scheme,
      host: _url.host,
      port: _url.port,
      path: _url.path,
      queryParameters: queryParameters, //use Uri default querystring serializer
    );
  }
}

/// convert all value to string type
///
///
_convertQueryParameters(Map<String, dynamic> parameters) {
  final Map<String, dynamic> queryParams = new Map<String, dynamic>();
  parameters.forEach((key, value) {
    if (value is List) {
      final List list = new List();
      for (final item in value) {
        list.add('$item');
      }
      queryParams[key] = list;
    } else {
      queryParams[key] = '$value';
    }
  });
  return queryParams;
}

/// global dio instance
final dio = new Dio(new BaseOptions(baseUrl: serverAddress))
  ..interceptors.add(
    InterceptorsWrapper(
      onRequest: (RequestOptions options) async {
        final fixOption = new FixQueryStringRequestOptions(
          method: options.method,
          sendTimeout: options.sendTimeout,
          receiveTimeout: options.receiveTimeout,
          connectTimeout: options.connectTimeout,
          data: options.data,
          path: options.path,
          queryParameters: _convertQueryParameters(options.queryParameters),
          baseUrl: options.baseUrl,
          onReceiveProgress: options.onReceiveProgress,
          onSendProgress: options.onSendProgress,
          cancelToken: options.cancelToken,
          extra: options.extra,
          headers: options.headers,
          responseType: options.responseType,
          contentType: options.contentType,
          validateStatus: options.validateStatus,
          receiveDataWhenStatusError: options.receiveDataWhenStatusError,
          followRedirects: options.followRedirects,
          maxRedirects: options.maxRedirects,
          requestEncoder: options.requestEncoder,
          responseDecoder: options.responseDecoder,
        );
        return fixOption; //continue
      },
      onResponse: (Response response) async {
        // Do something with response data
        return response; // continue
      },
      onError: (DioError e) async {
        // Do something with response error
        return e; //continue
      },
    ),
  );

docs
https://pub.dev/packages/dio#interceptors
https://github.com/flutterchina/dio/blob/master/dio/lib/src/options.dart

[ZhongXiaoHong]

#315 这个才是解决方案

[MinuteReversal]

#315 这个才是解决方案

成功了，谢谢