graphql - Apollo 服务器 2.0。在文档中找不到类型 "Upload"

Question

如何复制:

服务器.js

const { ApolloServer, makeExecutableSchema, gql } = require('apollo-server');

const typeDefs = gql`
type Mutation {
    uploadAvatar(upload: Upload!): String!
}
`;
const resolvers = {
    Mutation: {
        uploadAvatar(root, args, context, info) {
            return 'test';
        }
    }
  };

const schema = makeExecutableSchema({ typeDefs, resolvers });

const server = new ApolloServer({
  schema,
});

server.listen().then(({ url }) => {
  console.log(`🚀 Server ready at ${url}`);
});

包.json

"dependencies": {
    "apollo-server": "^2.0.0-rc.6",
    "graphql": "^0.13.2"
  }

在节点 server.js 上，我们收到以下错误:

Type "Upload" not found in document.

鉴于最新版本的 Apollo 服务器，我是否应该在查询中添加任何其他内容？根据 this教程和我目前不记得的其他一些资源，除了写上传之外不需要做任何其他事情，它应该可以正常工作。我错过了什么吗？

Answer 1

在 Apollo 文档的示例中，我有几种方法可以解决这个问题:

https://www.apollographql.com/docs/guides/file-uploads.html

你可以看到他不使用 makeExecutableSchema但是将解析器和模式传递给 Apollo 服务器，这停止了错误:

Type "Upload" not found in document.

如果你想使用 makeExecutableSchema然后导入标量

const typeDefs = gql`
  scalar Upload

  type Mutation {
    uploadAvatar(upload: Upload!): String!
  }
  type Query {
    ping: String
  }
`;

https://github.com/jaydenseric/apollo-upload-examples/blob/master/api/schema.mjs

如果您查看 at 博客文章的一些示例源代码，您会发现他使用了一个标量

它没有被自动添加的原因是

Scalar Upload The Upload type automatically added to the schema by Apollo Server resolves an object containing the following:

流

文件名

模仿类型

编码

更新: Apollo 更清楚地表明，当您使用 makeExecutableSchema 时，您需要定义标量才能使其工作

In a situation where a schema is set manually using makeExecutableSchema and passed to the ApolloServer constructor using the schema params, add the Upload scalar to the type definitions and Upload to the resolver

https://www.apollographql.com/docs/guides/file-uploads.html#File-upload-with-schema-param