我正在使用apollo-express服务器和GraphQL。我有一个突变,我从前端传递文件到后端,但我只收到第一个的file:{}对象-对于其他的,我收到承诺。
以下是我的突变宣言:
extend type Mutation {
createCase(input: CreateCase!, attachments: [Upload]): Case
}
我简化了我的实现,只使用console.log记录附件:
Mutation: {
createCase: async (
parentValue: any,
{ input, attachments }: { input: CaseInterface; attachments: [File] },
context: any
) => {
console.log(attachments)
}
}
我从前端传递文件,如下所示:
const SEND_CASE = gql`
mutation CreateCase($input: CreateCase!, $attachments: [Upload]) {
createCase(input: $input, attachments: $attachments) {
_id
}
}
`;
函数用法:
createCase({
variables: {
input: {
description: props.creationData.description,
date: new Date().toDateString(),
priority: props.creationData.priority,
userId: props.creationData.userId,
categoryId: props.categories.map((el: any) => el._id),
signature: "",
type: props.casetype === "problem" ? 1 : 2,
},
attachments: props.creationData.attachments,
},
});
prop.creationData.attachments看起来正常:
问题是,在我的后端I console.log(附件)看起来像这样:
[
Upload {
resolve: [Function (anonymous)],
reject: [Function (anonymous)],
promise: Promise { [Object] },
file: {
filename: 'wa.jpg',
mimetype: 'image/jpeg',
encoding: '7bit',
createReadStream: [Function: createReadStream]
}
},
Upload {
resolve: [Function (anonymous)],
reject: [Function (anonymous)],
promise: Promise { <pending> }
}
]
第二个Upload对象中的文件丢失,并且那里的Promise处于挂起状态。我无法解释为什么会这样。如果需要,我还可以使用console.log记录req.body和req.header:
{
host: '192.168.1.152:3001',
connection: 'keep-alive',
'content-length': '51479',
accept: '*/*',
'apollo-require-preflight': 'true',
authorization: '',
'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36',
'content-type': 'multipart/form-data; boundary=----WebKitFormBoundaryA2VfmoLeZm9NTXsk',
origin: 'http://localhost:3000',
referer: 'http://localhost:3000/',
'accept-encoding': 'gzip, deflate',
'accept-language': 'en-GB,en-US;q=0.9,en;q=0.8,bg;q=0.7'
}
{
operationName: 'CreateCase',
variables: {
input: {
description: 'test',
date: 'Thu Jan 19 2023',
priority: 1,
userId: '630899dc48a9a14833398a7e',
categoryId: [Array],
signature: '',
type: 1
},
attachments: [ [Upload], [Upload] ]
},
query: 'mutation CreateCase($input: CreateCase!, $attachments: [Upload]) {\n' +
' createCase(input: $input, attachments: $attachments) {\n' +
' _id\n' +
' __typename\n' +
' }\n' +
'}'
}
我怎么能有我的所有文件在我的后端是一样的第一个收到?
1条答案
按热度按时间1tu0hz3e1#
两个文件都“在那里”,但是到目前为止只有一个完成了上传。不过它们都是承诺,所以处理它们是一样的。你只需要等待承诺解决,你应该没事。
根据graphql-upload examples repo,假设您有一个类似
storeUpload
的方法,一次处理一个文件,您可以执行以下操作: