cannot modify user function for Facebook user

[adamontherun]

In iOS, with a normal (i.e. signed up with username and password) parse user, the following works:
[PFUser currentUser].username = @"newParseName";
[PFUser currentUser] save];

However, a user who authenticated via Facebook who performs

[PFUser currentUser].username = @"newFBName";
[PFUser currentUser] save];

will get the following error:

[Error]: cannot modify user function () {
return this.data.objectId || this.query.objectId;
} (Code: 206, Version: 1.12.0)

This 'cannot modify user function' error is returned for any changes you try to make to the current loggedin user when its a Facebook user.

[anthonylai]

Got the same issue.
This error also occurs when creating any objects in any classes. It just seems like the current user context is not set appropriately when a user is authenticated through facebook.

[ramymedhat]

I'm getting the same error with username/password login. It works fine right after the user signs in. But if the app is closed and reopened, it stops working.

[gfosco]

Interesting.. Okay, we need to track down the root of this.

[jganzabal]

Same issue here, used the simple code to test it and got: POST http://localhost:8081/parse/classes/_User/9ihJFseG01 400 (Bad Request)

function initFacebookWithParse() {
window.fbAsyncInit = function() {
Parse.FacebookUtils.init({
appId: '1554770854736875',
xfbml: true,
version: 'v2.5'
});
};

(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) {
        return;
    }
    js = d.createElement(s);
    js.id = id;
    js.src = "//connect.facebook.net/en_US/sdk.js";
    fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));

}

var currentUser;
function facebookLoginWithParse() {
if (!currentUser) {
Parse.FacebookUtils.logIn("email,public_profile", {
success: function(user) {
if (!user.existed()) {
console.log("User signed up and logged in through Facebook!");
FB.api('/me?fields=name,email', function(response) {
if (response.email) {
user.set("email", response.email);
}
user.save();
});
} else {
console.log("User logged in through Facebook!");
user.set("javaScriptLogin", true); //set anything to make sense on saving
user.save();
}
currentUser = user;
},
error: function(user, error) {
console.log(user);
console.log(error);
console.log("User cancelled the Facebook login or did not fully authorize.");
}
});
} else {
Parse.User.logOut();
Parse.User.currentAsync().then(function(user) {
currentUser = user;
console.log("logged out");
}, function(error) {
console.log("error");
console.log(error);
});

}

}

Logging in with user and password seems to work ok and lets me modify user

[viktor-skarlatov]

This happens because the server does not set the sessionToken of the user created by [PFUser become]. The server gets a session token, signs the user in and then returns the user without a valid session token. This happens in the handleMe() function in users.js. After fixing this I hit another brick but I haven't solved it yet. I will post more info as soon as I figure out a solution.

[Spacelapp]

Any news on this?

[edvincandon]

Check #173 -> it's been merged
Haven't tested it yet to see if that fixes the cannot modify user function issue

[edvincandon]

Just tested the #173, works like a charm. Now able to update_User object without any errors.
Note: I had to manually delete my _User and _Session schema for it to work properly.

Thanks @taylorstine !

[taylorstine]

@edvincandon 👍

[jganzabal]

Thanks @taylorstine ! Worked for me too after deleting _User and _Session schema.

[adamontherun]

this is resolved.

[DrBeak1]

This still seems to be an issue for me. If I log in with Facebook, every call returned is 'cannot modify user'. Unfortunately I cannot delete my schemas because the app is live. Is there any way to fix this? I even tried using Parse.Cloud.useMasterKey() in my user beforeSave cloud code, but the issue still occurs.

[ryderjack]

@DrBeak1 same issue - deleting _User and _Session didn't help either