本文介绍了GraphQL 查询:如果不为空则仅包含字段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

GraphQL 是否有可能让客户端告诉服务器它只在该字段不是 null 时才需要该字段?

Does GraphQL have the possibility for the client to tell the server that it wants a field only if that field is not null?

给定查询

query HeroAndFriends {
  hero {
    name
    friends {
      name
    }
  }
}

响应应该是这样的

{
  "data": {
    "hero": {
      "friends": [
        {
          "name": "Luke Skywalker"
        },
        {
          "name": "Han Solo"
        },
        {
          "name": "Leia Organa"
        }
      ]
    }
  }
}

代替

{
  "data": {
    "hero": {
      "name": null,
      "friends": [
        {
          "name": "Luke Skywalker"
        },
        {
          "name": "Han Solo"
        },
        {
          "name": "Leia Organa"
        }
      ]
    }
  }
}

在不违反 GraphQL 规范的情况下这可能吗?

Is this possible without violating the GraphQL specification?

推荐答案

据我所知这是不可能的,有指令,如@skip 和@include.指令,但它们需要一个变量,我认为您可以与 graphql 团队一起说明情况,将指令扩展为仅包含不为空的字段.

As far as I know this is not possible, there are directives like @skip and @include. Directives but they need a variable, I think you can make your case with the graphql team to extend the directives to only include the field if it's not null.

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07-17 03:08
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