上传文件阿波罗安卓

Question

我想上传图片到 apollo-server

服务器突变模式，“创建帖子”获取文本和文件，并应存储文件并创建帖子

const mutation = new GraphQLObjectType({
    name: 'Mutation',
    fields: {
      createPost: {
        description: 'Create a new Post',
        type: GraphQLID,
        args: {
            text:{
                description:"description",
                type:GraphQLString
            },
            files: {
                description: 'images and videos',
                type: GraphQLList(GraphQLUpload!) 
            },
        },
        async resolve(parent, { files }) {
            console.log(files)
          
            return true;
        },
      },
    },
})

ViewModel 有名为“submit”的方法应该调用mutation 文本是字符串，它是变异的文本 URIs 是图像 uri

   fun submit(){
        viewModelScope.launch {

            try {
                apolloClient.mutate(CreatePostMutation(text.toInput(),files = URIs.mapIndexed() {index,uri -> uri.toFileUpload(context,"$index.png","image/png") })).await()

            }catch (error:ApolloException){
                Log.i("lol",error.message!!)
            }



        }
    }

uri.toFileUpload 将内容 uri 转换为 inputStream 然后调用 inputStream.toFileUpload

fun Uri.toFileUpload(context:Context,name:String,mimeType: String): FileUpload {
    return context.contentResolver.openInputStream(this)!!.toFileUpload(mimeType,name)
}

inputStream.toFileUpload 将 inputStream 转换为 FileUpload

fun InputStream.toFileUpload(mimetype:String,name:String):FileUpload{
    val inputStream = this
    return object : FileUpload(mimetype) {
        override fun contentLength() = inputStream.available().toLong()
        override fun fileName() = name
        override fun writeTo(sink: BufferedSink) {
            sink.writeAll(inputStream.source().buffer())
        }
    }
}

我在提交时遇到此错误 BadRequestError: Missing multipart field ‘operations’ (https://github.com/jaydenseric/graphql-multipart-request-spec)