Model with persist: false. Store saves anyway

[Tegola]

Hello,
I've setup a "Tasklist" model, which has many tasks. On initialization, the tasklist counts all overdue tasks and updates a field. Since that field is only needed locally, it is set as persist: false. However, when using this model in a store, the store.sync() method saves it anyway, even if the that field is the only modified field.

Here's my model:

Ext.define('Tasklist', {
	extend: 'Ext.data.Model',
	config: {
		fields: [
			{ name: 'id', type: 'int' },
			{ name: 'overdue-tasks', type: 'int', persist: false }
		]
	},
	
	init: function() {
		// Update overdue tasks count
		var count = 0;
		var now = new Date();
		
		var tasks = this.tasks(); // HasMany association, omitted in this example
		
		tasks.each(function(record){
			var dueDate = record.get('due-date');
			if (dueDate && dueDate.getTime() < now.getTime()) count++;
		});
		
		this.set('overdue-tasks', count);
	}
});

What I'm doing wrong?

[mitchellsimoens]

With 2.1.0, this code:

Ext.define('MyModel', {
    extend : 'Ext.data.Model',

    config : {
        fields : [
            { name : 'foo', persist : false }
        ]
    }
});

new Ext.data.Store({
    autoLoad  : true,
    model     : 'MyModel',
    proxy     : {
        type : 'ajax',
        url  : 'data/json.json'
    },
    listeners : {
        load : function (store, recs) {
            recs[0].set('foo', 'other');

            store.sync();
        }
    }
});

it doesn't send the foo field in the sync request.