我正在使用 GraphQLClient 將graphql-request請(qǐng)求發(fā)送到我的服務(wù)器。我正在嘗試通過(guò)執(zhí)行以下操作來(lái)上傳文件：const graphQLClient = new GraphQLClient('http://localhost:4000/graphql', {    credentials: 'include',    mode: 'cors',});const source = gql`    mutation uploadImage($file: Upload!) {        uploadImage(file: $file)    }`;const file: RcFile = SOME_FILE; // RcFile (from antd) extends Fileawait graphQLClient.request<{uploadImage: boolean}>(source, { file });但是，當(dāng)我以這種方式向服務(wù)器發(fā)送請(qǐng)求時(shí)，出現(xiàn)以下錯(cuò)誤：GraphQLError: Variable \"$file\" got invalid value {}; Upload value invalid這就是我的請(qǐng)求在控制臺(tái)中的樣子：operations: {    "query":"\n mutation uploadProfileImage($file: Upload!){\n uploadProfileImage(file: $file)\n }\n",      "variables":{"file":null}}map: {"1":["variables.file"]}1: (binary)其他人遇到過(guò)這個(gè)問(wèn)題嗎？我似乎無(wú)法將文件上傳到我的后端。