[API] "Firebase.child failed" Error - Help Please!

Note to readers: See this post for the true root of the problem, and this post for the solution.

• The card token ID (since I have recalled & shuffled the deck)
• The X and Y coordinates (where I drag the card onto the desktop)
• The "restarting the sandbox" messages in the middle, with the page ID re-logged.
• The error message at the end.

on("ready", function() {
    var n = +new Date();
    var obj = createObj("rollabletable", {
        name: String(n)
    });
    obj.set("name", "post_" + n);
});

on("ready", function() {
    var n = +new Date();
    var obj = createObj("rollabletable", {
        name: String(n)
    });
    
    var old_doSave = obj.doSave;
    obj.doSave = function() {
        log("before");
        log(arguments);
        //old_doSave.apply(obj, arguments);
        log("after");
    }
    
    obj.set("name", "post_" + n);
});

on("ready", function() {
    var n = +new Date();
    var obj = createObj("rollabletable", {
        name: String(n)
    });
    var p = obj.changed._fbpath;
    var new_p = p.replace(/([^\/]*\/){4}/, "/");
    obj.fbpath = new_p;
    obj.set("name", "new_" + n);
});

Changing the protected properties of a read-only R20 object ought to be overwritten the next time that object is read from the DB; I haven't specifically tested this with the fbpath, but I have with things like an object's ID in the past. However, in this case, you're changing the protected property of a newly-created object, to be the value that you want it to be when you later read it from the DB. If this bug is only occurring on new objects (in other words, if var obj = create(...); followed by obj = getObj(..., obj.id); in a new sandbox session works without problems), then this workaround shouldn't ever cause any issues.

function fixNewObject(obj)
{
    var p = obj.changed._fbpath;
    var new_p = p.replace(/([^\/]*\/){4}/, "/");
    obj.fbpath = new_p;
    return obj;
}

on("ready", function()
{
    var o = createObj("text", { pageid: Campaign().get("playerpageid"), layer: "objects",
        left: 70, top: 70, width: 70, height: 70, text: "Newly created text."
    });
    o = fixNewObject(o);
    o.set( {text: "Updated text." });
});

Rendelle F. said:

Wow, you've actually done it! I'm a little confused as to why you can change this one property and not any others, but I can confirm that this works on my test case as well.

It is technically possible to change the other protected attributes. As I said, though, changes to protected attributes will only last for the current instance of the sandbox.

(function() {
    var oldCreateObj = createObj;
    createObj = function() {
        var obj = oldCreateObj.apply(this, arguments);
        if (obj && !obj.fbpath) {
            obj.fbpath = obj.changed._fbpath.replace(/([^\/]*\/){4}/, "/");
        }
        return obj;
    }
}())

Shu Zong C. said:

As an actual solution, I'd prefer a fix in this method:
<snip>

(function() {
    var oldCreateObj = createObj;
    createObj = function() {
        var obj = oldCreateObj.apply(this, arguments);
        if (obj && !obj.fbpath) {
            obj.fbpath = obj.changed._fbpath.replace(/([^\/]*\/){4}/, "/");
        }
        return obj;
    }
}())

Steve D. said:

I tried using this script and it did keep the system from throwing an error however if I dynamicly add attributes to a character sheet and close the campaign window nothing is saved. Is there a work around?

(function() {
    var oldCreateObj = createObj;
    createObj = function() {
        var obj = oldCreateObj.apply(this, arguments);
        if (obj && !obj.fbpath) {
            	obj.fbpath = obj.changed._fbpath.replace(/([^\/]*\/){4}/, "/");
        } else if (obj && !obj.changed && type == 'attribute') {           
		obj.fbpath = '/char-attribs/char/'+ characterID +'/'+ id;
	}

        return obj;
    }
}())