在 Relay.js 中，`Client Mutation Identifier` 是什么？

Question

在中继文档 here 中，它说：

Relay uses a common pattern for mutations, where there are root fields on the mutation type with a single argument, input, and where the input and output both contain a client mutation identifier used to reconcile requests and responses.

但在他们提供的示例中，输入和输出分别如下所示：

// IntroducedShipInput
{
  "input": {
    "shipName": "B-Wing",
    "factionId": "1"
  }
}

// IntroducedShipPayload
{
  "introduceShip": {
    "ship": {
      "id": "U2hpcDo5",
      "name": "B-Wing"
    },
    "faction": {
      "name": "Alliance to Restore the Republic"
    }
  }
}

那么 client mutation 标识符是什么？为什么以及如何使用它来协调请求和响应？

Answer 1

我仍然不能 100% 确定 "client mutation identifier," 究竟发生了什么，但经过一些研究，它似乎是 Relay 以前版本的要求。 This PR apparently removed the requirement by replacing it with some other mechanism, but it's not clear to me what that other mechanism does. I left a comment requesting more clarification around the documentation，似乎已过时。

无论如何，客户端变异标识符appears to have been related to some assumptions about mutation idempotency in Facebook's implementation of GraphQL。

在 Relay.js 中，`Client Mutation Identifier` 是什么？

In Relay.js, what is the `Client Mutation Identifier`?

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