如何在一个请求中使用不同的参数多次运行一个突变? [英] How can i run one mutation multiple times with different arguments in one request?

问题描述

我有一个突变:

const createSomethingMutation = gql`
  mutation($data: SomethingCreateInput!) {
    createSomething(data: $data) {
      something {
        id
        name
      }
    }
  }
`;

如何在一个请求中创建多个Something?我是否需要在我的GraphQL服务器上创建一个新的Mutation，像这样:

How do I create many Somethings in one request? Do I need to create a new Mutation on my GraphQL server like this:

mutation {
  addManySomethings(data: [SomethingCreateInput]): [Something]
} 

或者是否有一种方法可以在一个请求中多次使用具有不同参数的Apollo Client现有的createSomethingMutation?

Or is there a way to use the one existing createSomethingMutation from Apollo Client multiple times with different arguments in one request?

推荐答案

实际上，您可以使用别名来做到这一点，并为每个别名分别设置变量:

You can in fact do this using aliases, and separate variables for each alias:

const createSomethingMutation = gql`
  mutation($dataA: SomethingCreateInput!) {
    createA: createSomething(data: $dataA) {
      something {
        id
        name
      }
    }
    createB: createSomething(data: $dataB) {
      something {
        id
        name
      }
    }
  }
`;

您可以在规范中看到 的更多示例.

You can see more examples of aliases in the spec.

然后，您只需要提供一个具有两个属性的变量对象-dataA和dataB.但是，如果您需要动态变化的数量，事情就会变得很混乱.通常，在这种情况下，只暴露一个突变来处理创建/更新一个或多个模型实例可能会更容易(更有效).

Then you just need to provide a variables object with two properties -- dataA and dataB. Things can get pretty messy if you need the number of mutations to be dynamic, though. Generally, in cases like this it's probably easier (and more efficient) to just expose a single mutation to handle creating/updating one or more instances of a model.

如果您尝试减少从客户端到服务器的网络请求数量，则还可以查看

If you're trying to reduce the number of network requests from the client to server, you could also look into query batching.

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