code for reg model

    Ext.regModel('User', {
              fields: [{name: 'id', type: 'int'},
              'name',
              { name: 'height',  type: 'int',
                    convert: function(inches) {
                            return Math.round(inches * 2.54);
                    }
              }]


    var abe = new User({id: 123, name: 'Abe Elias',height: 76 });   console.log(abe.get('id')); //logs 123 (a JavaScript Number object)
    console.log(abe.get('name')); //logs 'Abe Elias' (A JavaScript String object) console.log(abe.get('height')); //logs 193 (inches converted to centimeters) });