Prevent Proxy from sending extra fields

[ddrmaxgt37]

Here is my model:

Ext.define('A.model.Group', {
    extend: 'Ext.data.Model',
    fields:['id', 'name'],
    proxy: {
        type: 'rest',
        url: '/group',
        reader: {
            type: 'json',
            root: 'data'
        },
        writer: {
            type: 'json',
            writeAllFields: false
        }
    }
});

The model is being used in a Tree via a TreeStoreThe problem is that when a PUT, POST or DELETE method is done, instead of sending only fields from the model in the JSON payload, fields from Ext.data.NodeInterface are also sent. Here is an example payload:

{"id":"","name":"TestGroup","parentId":"8","index":0,"depth":3,"checked":null}

I don't want the extra fields parentId, index, depth, and checked to be sent. What is the best way to do this? I don't want to have to ignore them on the server.

[skirtle]

I don't see a pleasant way to do this. I haven't tested it but I'd imagine something like this might work:

Ext.define('A.model.Group', {
    extend: 'Ext.data.Model',
    fields:['id', 'name'],
    ...
});

// Looks odd but this will cause the model's prototype to have the node fields added
Ext.data.NodeInterface.decorate(Ext.create('A.model.Group'));

A.model.Group.prototype.fields.each(function(field) {
    if (field.name !== 'id' && field.name !== 'name') {
        field.persist = false;
    }
});

[ddrmaxgt37]

Thanks for the response. This works. Hopefully I'll find a better way of doing this sometime.