ExtJS 4 Sync and success/failure processing

[edspencer]

We're looking at how to improve support for this in 4.1 and 4.2, it's too hard right now

[notjoshing]

Thanks, all, for this; it helped me isolate a problem I was having in Ext 4.0.2. In my code, I had success/failure handlers on the save events:

            record.save({
                success : function(record) {
                    //MyData.object stores some variables before this.
                    var record = MyData.object.record;
                    record.commit();
                    var win = MyData.object.window;
                    win.close();
                    var s   = MyData.object.store;
                    s.sync();
                },
                failure : function(record, op) {
                    Ext.Msg.alert("Save error!",
                        op.request.scope.reader.jsonData["error"]);
                }
            }); 

The success handler wasn't being called, and I isolated why. Here's the 4.0.2 save function definition:

    save: function(options) {
        options = Ext.apply({}, options);

        var me     = this,
            action = me.phantom ? 'create' : 'update',
            record = null,
            scope  = options.scope || me,
            operation,
            callback;

        Ext.apply(options, {
            records: [me],
            action : action
        });

        operation = Ext.create('Ext.data.Operation', options);

        callback = function(operation) {
            if (operation.wasSuccessful()) {
                record = operation.getRecords()[0];
                //we need to make sure we've set the updated data here.
                //Ideally this will be redundant once the
                //ModelCache is in place
                me.set(record.data);
                record.dirty = false;

                Ext.callback(options.success, scope, [record, operation]);
            } else {
                Ext.callback(options.failure, scope, [record, operation]);
            }

            Ext.callback(options.callback, scope, [record, operation]);
        };

        me.getProxy()[action](operation, callback, me);

        return me;
    }, 

These two rows each fail silently:

                me.set(record.data);
                record.dirty = false; 

If you don't have a success callback, you won't see an error; your success callback just won't get called I've overridden these two lines in my code, and all seems well.

Has anyone else seen this?

Josh

[altrange]

The problem is here -

record = operation.getRecords()[0];

But, operation.getRecords method is undefined.

So, I'm using

record = operation.records[0]; 

[edspencer]

We've given sync the ability to take callbacks in 4.1, we'll get it into your hands as quickly as possible. Sorry for shipping such a difficult API in 4.0

[Sneha004]

You can get access to the returned json data from the operation argument to the success and failure functions. For example, when I call save on a "user" record and the save fails on the server side, I can return the failure json:


{ "success": "false", "message": "Error message goes here." }


and get it from the op:


user.save({
success: function(rec, op) {
// do something
},
failure: function(rec, op) {
Ext.Msg.alert("Failed",op.request.scope.reader.jsonData["message"]);
}
});


It took a little digging to find that, but it's there.

Can I use success() and failure() function inside store.load({}) in ExtJs4?
I tried ,But its not working .

My code as :
store.load({
success: function(rec, op) {
alert('success');
},
failure: function(rec, op) {
alert('failure');
}
});

I have tried also using callback function() inside store.load() , but unfortunately its also not working.

Please provide some reasonable solution as soon as possible.

[neaplus]

the documantation says there is success callback ability added to 4.1 but i cant get it work, someone can try it?

[Sneha004]

But I am using ExtJs4.0 .

Can any one give solution how to get json data from service response which should reflect on the grid ?

Please give me the solution as soon as possible.
I have used callback() function inside store.load({});
It is working some times after debugging the store.load({}) and some times its not working .
I have tried a lot.

If anybody have any suggestion , Please clarify.
I need yours help.

Thank you

[dllchrist]

bump this, i can't get it work on extjs 4.1 either.

[olecom]

bump this, i can't get it work on extjs 4.1 either.

.

Extjs 4.1-rc2, store with REST proxy, on server side nodeJS + expressJS work for me:

store.sync({success: sfun(batch, opts), failure: ffun(batch, opts)})

As for API. Call `store.sync()` returns useless store itself. But `return needsSync` will say that there will be no async calls to either handler, which is great to know BTW. It's possible to make finishing job right now.

[olecom]

While doing store sync there are 3 possible code branches:

sync_processing_ui_updates()

if(needsSync) success_call_back_ui_updates()

if(needsSync) fail_call_back_ui_updates()

if(!needsSync) no_sync_call_ui_updates()

Thus returning needsSync from store.sync() call manages all possible branches easily.