thenWith<R2, E> method

Future<ChainResult<M, R2>> thenWith<R2, E>(Future<Response<R2>> nextRequest(M extracted, Response<R> prevResponse), { E? extractor(Response<R2> response)?, M updater(M extracted, E? extractedValue)?, })

继续链式调用（中间步骤） 等同于 await chainResult.thenWith(...)

参数说明：

• nextRequest: 下一个请求（必需）
• extractor: 从响应中提取数据（可选），如果提供，会提取数据用于更新对象
• updater: 更新对象（可选），如果提供，会用提取的数据更新对象

示例1：中间步骤，不更新对象

final chainResult = await http.isLoading
  .send(...)
  .extractModel<FileUploadResult>(FileUploadResult.fromConfigJson)
  .thenWith((uploadResult) => http.uploadToUrlResponse(...));

示例2：中间步骤，更新对象并继续链式调用

final chainResult = await http.isLoading
  .send(...)
  .extractModel<FileUploadResult>(FileUploadResult.fromConfigJson)
  .thenWith(
    (uploadResult, prevResponse) => http.send(...),
    extractor: (response) => response.extractField<String>('image_url'),
    updater: (uploadResult, imageUrl) => uploadResult.copyWith(imageUrl: imageUrl),
  )
  .thenWith((updatedUploadResult, prevResponse) => http.send(...)); // 可以继续链式调用

Implementation

Future<ChainResult<M, R2>> thenWith<R2, E>(
  Future<Response<R2>> Function(M extracted, Response<R> prevResponse)
      nextRequest, {
  E? Function(Response<R2> response)? extractor,
  M Function(M extracted, E? extractedValue)? updater,
}) async {
  final chainResult = await this;
  return await chainResult.thenWith<R2, E>(
    nextRequest,
    extractor: extractor,
    updater: updater,
  );
}