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    Default Problem and solution about Model with Ext.Direct proxy

    Problem and solution about Model with Ext.Direct proxy


    I found a problem that Model with direct proxy failed to initialize, especially after app was built. It showed error messages like "Uncaught TypeError: Cannot read property 'directCfg' of null" when the Model try to call proxy.
    Because the Model class try to create instance of proxy when the class is defined ( not when the class is instanciated).
    The Direct proxy evaluates directFn only when it is set at applyDirectFn. To prevent failure, I extended Ext.data.proxy.Direct class. This class evaluates directFn whenever it is obtained at getDirectFn.

    Code:
    Ext.define('SevenDays.proxy.DirectWithStringFn', {
        extend : 'Ext.data.proxy.Direct',
        alias : 'proxy.directWithStringFn',
        requires : [ 'Ext.data.proxy.Direct' ],
    
    
        applyDirectFn : function(directFn) {
            //<debug>
            if (!Ext.isString(directFn)) {
                console.log('directFn must be string.');
            }
            //</debug>
            return directFn;
        },
        getDirectFn : function() {
            var me = this;
            var directFn = me.callParent(arguments);
            //<debug>
            if (!Ext.isString(directFn)) {
                console.log('directFn must be string.');
            }
            //</debug>
            return Ext.direct.Manager.parseMethod(directFn);
        }
    });
    I consider that it is better to keep directFn once it is parsed correctly.
    Last edited by hosokaws; 12 Jul 2013 at 3:02 AM. Reason: To add specific error message

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