我正在尝试使用 apollo-angular 将文件从 Angular 上传到 apollo 服务器,但文档令人困惑,而且我在类中找到的信息未更新到最新版本的 apollo angular 和 apollo 服务器。
在前端我有:
突变
export const Save_UserMutation = gql`
mutation SaveUserMutation ($data: UsersInput!, $file: Upload) {
createUser(data: $data, file: $file) {
user
}
}
`
服务
save(_userData: User, emitMessage?: boolean) {
let file = _userData.profilePicture
_userData.profilePicture = (_userData.profilePicture as File).name
const saveUser$ = this.apollo.mutate({
mutation: Save_UserMutation,
variables: {
data: _dataUsuario,
file
},
context: {
useMultipart: true
}
}).subscribe()
}
在后端:
服务器
const server = new ApolloServer({
schema,
context: createContext,
uploads: false
})
Uploads 设置为 false 就像文档说的 https://www.apollographql.com/docs/apollo-server/data/file-uploads/#gatsby-focus-wrapper
用nexus写的变异
export const UsersMutation = extendType({
type: 'Mutation',
definition(t) {
t.nonNull.field('createUser', {
type: 'Users',
args: {
data: nonNull(arg({ type: 'UsersInput' })),
file: arg({
type: GraphQLUpload
})
},
async resolve(parent, args, ctx) {
if (args.file) {
const { createReadStream, filename, mimetype, encoding } = await args.file
const stream = createReadStream()
const pathName = path.join(__dirname, 'public', 'profilePictures') + `/${filename}`
await stream.pipe(fs.createWriteStream(pathName))
args.data.profilePicture == pathName
}
args.data.password = await bcrypt.hash(args.data.password, 10)
return ctx.prisma.users.create({
data: args.data
})
}
}),
})
当我尝试上传文件时,出现以下错误。
POST body missing. Did you forget use body-parser middleware?
答案 0 :(得分:0)
我终于找到了如何使它工作阅读graphql-upload库文档的详细信息。
在设置标题中说。
<块引用>使用 graphqlUploadKoa 或 graphqlUploadExpress 中间件就行 在 GraphQL 中间件之前。或者,使用 processRequest 创建 自定义中间件。
我没有实施任何选项,因此未处理请求。
我从 Apollo Server 改为 apollo server express 并添加了 graphqlUploadExpress 作为中间件
server.ts
import { ApolloServer } from 'apollo-server-express'
import { createContext } from './context'
import { schema } from './schema'
import express from 'express'
import { graphqlUploadExpress } from 'graphql-upload';
import path from 'path';
import dotenv from 'dotenv'
dotenv.config()
const app = express();
const PORT = process.env.PORT || 4000
const server = new ApolloServer({
schema,
context: createContext,
uploads: false
})
let publicPath = path.join(__dirname, '..', 'public')
app.use(express.static(publicPath))
app.use(
'/graphql',
graphqlUploadExpress({ maxFileSize: 10000000, maxFiles: 10 })
)
server.applyMiddleware({ app })
app.listen({ port: PORT }, () => {
console.log(`Server running on port ${PORT}`)
})
当我使用 nexus 时,我在我的模式定义文件中定义了一个标量:
架构定义文件
export const Upload = scalarType({
name: GraphQLUpload.name,
asNexusMethod: 'upload', // We set this to be used as a method later as `t.upload()` if needed
description: GraphQLUpload.description,
serialize: GraphQLUpload.serialize,
parseValue: GraphQLUpload.parseValue,
parseLiteral: GraphQLUpload.parseLiteral,
});
然后我在突变参数中使用上传类型来访问文件信息并将其保存在文件系统中。
t.nonNull.field('createUser', {
type: 'userMutationResponse',
args: {
data: nonNull(arg({ type: 'UsersInput' })),
file: arg({ type: 'Upload' })
},
async resolve(parent, args, ctx) {
if (args.file) {
const { createReadStream, filename, mimetype, encoding } = await file
const stream = createReadStream()
let newFilename = modFilename(filename)
const pathName = path.join(__dirname, '..', '..', 'public', 'profilePictures') + `/${newFilename}`
await stream.pipe(fs.createWriteStream(pathName))
}
args.data.password = await bcrypt.hash(args.data.password, 10)
const userCreated = await ctx.prisma.users.create({ data: args.data })
userCreated.profilePicture = new URL('profilePictures/' + userCreated.profilePicture, process.env.URI).toString()
return userCreated }
}),