gapi.client.drive.files.create does not work - google-api

Question

I'm writing a vue app. I read this sample code and wrote code like this:
const apiKey = 'mykey';
const discoveryDocs = ["https://www.googleapis.com/discovery/v1/apis/drive/v3/rest"]
const clientId = 'myclientid'
const scopes = 'https://www.googleapis.com/auth/drive.appdata'
function handleClientLoad() {
gapi.load('client:auth2', initClient);
}
function initClient() {
gapi.client.init({
apiKey,
discoveryDocs,
clientId,
scope: scopes
}).then(function () {
createFile()
});
}
function createFile() {
console.log('createFile')
var fileMetadata = {
'name': 'config.json',
'parents': ['appDataFolder']
};
var media = {
mimeType: 'application/json',
body: "body"
};
gapi.client.drive.files.create({
resource: fileMetadata,
media,
fields: 'id'
}, function (err, file) {
console.log('function in createFile')
if (err) {
console.error(err);
} else {
console.log('Folder Id:', file.id);
}
});
}
window.onload=handleClientLoad()
In the console, 'createFile' is logged but 'function in createFile' is not logged, so I think function(err, file)... does not work.
What is wrong?
I want the sample code to work.

Answer 1

I had the same issue. The function create() returns a promise, to execute the request, it seems to need a then(). See also this post.
The example code though does not work since you will get a 403 The user does not have sufficient permissions for this file error. This seems to happen since example code will create the file not in appDataFolder but in the root directory.
I managed to get it to work using the following code. Putting all request parameters flat into the object passed to create() seems to do the trick.
const s = new Readable();
s.push("beep"); // the string you want
s.push(null);
gapi.client.drive.files
.create({
name: "config.json",
parents: ["appDataFolder"],
mimeType: "application/json",
upload_type: "media",
fields: "id",
body: s,
})
.then(function (response) {
if (response.status === 200) {
var file = response.result;
console.log(file);
}
})
.catch(function (error) {
console.error(error);
});