使用代码并组合时会转换Alamofire响应
我想使用Alamofire查询我的后端，使用Alamofire的内置代码解析编码响应，然后从结果结构中发布摘录，以由我的API类的呼叫者消费。假设我从后端有一些JSON数据（简化，但显示了结构）：
{
"total": 123,
"results": [
{"foo" : "bar"},
{"foo" : "baz"}
]
}
以及关联的Codable结构
struct MyServerData: Codable {
let total: Int
let results: [Result]
}
struct Result: Codable {
let foo: String
}
我可以获得，分析，发布和订阅以下所有
func myAPI() -> DataResponsePublisher<MyServerData> {
return AF.request("https://backend/path")
.validate()
.publishDecodable(type: MyServerData.self)
}
myAPI()
.sink { response in /* Do stuff, e.g. update @State */ }
内容 ：喜欢做的就是仅发布[结果]数组。正确的方法是什么？我是否应该使用.ResponsedEcodable（）并创建一个新的Publisher（某种程度上 - .map（）？），返回[result] [result] .publisher ？
虽然我认为我了解基于反应/流的原理，但我的组合fu仍然很弱，而且我对一个发行商转变为另一个发行商没有明确的处理（我猜？），
谢谢！
I want to use Alamofire to query my backend, encode the response using Alamofire's built-in Codable parsing and then publish an extract from the resulting Struct to be consumed by the caller of my API class. Say I have some JSON data from my backend (simplified, but shows the structure):
{
"total": 123,
"results": [
{"foo" : "bar"},
{"foo" : "baz"}
]
}
and the associated Codable Structs
struct MyServerData: Codable {
let total: Int
let results: [Result]
}
struct Result: Codable {
let foo: String
}
I can get, parse, publish, and subscribe all fine with the following:
func myAPI() -> DataResponsePublisher<MyServerData> {
return AF.request("https://backend/path")
.validate()
.publishDecodable(type: MyServerData.self)
}
myAPI()
.sink { response in /* Do stuff, e.g. update @State */ }
What I'd like to do is to publish just the [Result] array. What's the correct approach to this? Should I use .responseDecodable() and create a new publisher (somehow - .map()?) that returns a [Result].publisher?
While I think I understand the reactive/stream based principles my Combine-fu is still weak and I don't have a clear handle on the transformation of one publisher into another (I'm guessing?)
Thanks in advance!
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除了使用
MAP之类的组合API外，Alamofire还向dataResponsePublisher本身提供了两个发布者。.result（）从dataresponse中提取结果，并创建anypublisher＆lt; result＆lt; value，aferror＆gt; ,, never gt; 。.value（）从dataResponse中提取value，并创建一个故障发布者，anypublisher＆lt; value，aferror＆gt;。因此，根据您想要的错误处理，这可能很简单：
In addition to using Combine API like
map, Alamofire offers two publishers onDataResponsePublisheritself..result()extracts theResultfrom theDataResponseand creates anAnyPublisher<Result<Value, AFError>, Never>..value()extracts theValuefrom theDataResponseand creates a failable publisher,AnyPublisher<Value, AFError>.So depending on what kind of error handling you want, this could be as simple as: