Hi All,
I am trying to parse childId Value from below response in extjs4.1 .I am newbee for association and hasMany concepts .But I am not able to get the value. can anybody tell whether i have defined model correct ?.Can anybody tell what is problem How to fix it..Is am doing right way ?

sample.Json
Code:
{
        "parents":{
         "parent1":{
           "parent":[
             {
                 "children":{
                     "child":[
                      {
                          "childId":1,
                          "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test",
                      "childAge": "19"
                    },
                    {
                      "childName": "Test1",
                      "childAge": "20"
                    }
                  ]
                }
                          
                  },
                      {
                          "childId":2,
                           "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test2",
                      "childAge": "25"
                    },
                    {
                      "childName": "Test3",
                      "childAge": "24"
                    }
                  ]
                } 
                          
                          
                      }
                   ]
                }
             },
             {
            "children":{
                   "child":[
                      {
                         "childId":3,
                         "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test4",
                      "childAge": "25"
                    },
                    {
                      "childName": "test5",
                      "childAge": "21"
                    }
                  ]
                }
                  
                            
                      },
                      {
                         "childId":4,
                          "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test6",
                      "childAge": "26"
                    },
                    {
                      "childName": "test7",
                      "childAge": "27"
                    }
                  ]
                }
                     }
               
               
                             
               
                   ]
                },
                
                
               "parentName":"firstName",
               "parentAge":"28"
                              
             },
             
             
             {
                 "children":{
                     "child":[
                      {
                          "childId":5,
                          "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test8",
                      "childAge": "24"
                    },
                    {
                      "childName": "Test9",
                      "childAges": "27"
                    }
                  ]
                }
                          
                          
                      },
                      {
                          "childId":6,
                           "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test10",
                      "childAge": "25"
                    },
                    {
                      "childName": "Test11",
                      "childAge": "24"
                    }
                  ]
                } 
                          
                          
                      }
                   ]
                }
             },
             {
                "children":{
                   "child":[
                      {
                         "childId":7,
                         "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test12",
                      "childAge": "25"
                    },
                    {
                      "childName": "Test13",
                      "childAge": "21"
                    }
                  ]
                }
                  
                            
                      },
                      {
                         "childId":8,
                          "childdetails": {
                  "childrendetails": [
                    {
                      "childName": "Test14",
                      "childAge": "26"
                    },
                    {
                      "childName": "Test15",
                      "childAge": "27"
                    }
                  ]
                }
                     }
               
                                           
                ]
                },
                
                
               "parentName":"secondname",
               "parentAge":"35"
                              
             }
             
            ]
          
       }
       
             
    }
    
    }

ParentModel.js

Code:
Ext.define("extcityview.model.ParentModel", {
    extend: 'Ext.data.Model',
     fields: [
        'parentName', 'parentAge'
    ],
    hasMany: {model: 'extcityview.model.ChildrenModel', name: 'children'},
   
});




Ext.define("extcityview.model.ChildrenModel", {
    extend: 'Ext.data.Model',
    hasMany  : {model:'extcityview.model.ChildModel', name:'child', associationKey: 'childItems'},
    belongsTo: 'extcityview.model.ParentModel'
});




Ext.define("extcityview.model.ChildModel", {
    extend: 'Ext.data.Model',
    fields: [
         'childId'
    ],
     belongsTo: 'extcityview.model.ChildrenModel'
});

ChildStore.js

Code:
Ext.define('extcityview.store.ChildStore', {
	extend : 'Ext.data.Store',
	storeId : 'samplestore',
	model : 'extcityview.model.ParentModel',
	autoLoad : 'true',
	proxy : {
		type : 'ajax',
		url : 'sample.json',
		reader : {
			type  : 'json',
            root  :'parents.parent1.parent'		
		}
	}


});
In app.js alert the value


Code:
store.load({
			callback: function() 
			{
			  console.log("i am in callback");
				var parent = store.first();
				alert("parent"+parent);
				console.log("parent"+parent);
				parent.children().each(function(children){
				 children.child().each(function(child)	{
				 alert("sub region anme"+child.get('childId'));
				 console.log("sub region name"+child.get('childId'));
				 	
				 });
			    
			    
			    
			    
				}); 
			}
        });
Thanks