在AWS AppSync中对订阅进行自定义过滤 [英] Custom filtering on subscription in AWS AppSync

问题描述

是否可以在AWS AppSync的订阅中具有自定义过滤逻辑?

Is it possible to have custom filtering logic on subscription in AWS AppSync?

据我所知，当前行为是: 例如我的架构如下所示

As I know, current behavior is: e.g. my schema is like the following

type Mutation {
  createEvent(userId: ID!, event: Event!): Event!
}

type Subscription {
  onEvent(userId: ID!): Event!
  @aws_subscribe(mutations: ["createEvent"])
}

AppSync的当前行为是，当我触发createEvent时，Appsync承诺如果userId相等，则订阅的订阅者会收到该事件. 即AppSync的过滤逻辑就像

Current behavior of AppSync is, when I trigger createEvent, AppSync promise that the subscriber of Subscription receive the Event if the userId are equal. i.e. the filtering logic of AppSync is sth like

if (Muatation.userId == Subscription.userId) {
  // forward to subscriber
}

但是，如果我想要不同的过滤逻辑怎么办? 例如，我想预订除我触发的事件以外的所有其他事件? 即

But what if I want different filtering logic? For example, I want to subscribe all other events except those triggered by me? i.e.

if (Muatation.userId != Subscription.userId) {
  // forward to subscriber
}

那么，AppSync中是否可以具有自定义过滤逻辑?

So, is it possible to have custom filtering logic in AppSync?

推荐答案

当前，AppSync不支持此用例.

Currently, this use case is not supported by AppSync.

将来可能会考虑添加自定义过滤.

Adding custom filtering may be considered in the future.

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