I have 2 models Event and Media.(Event has many medias and media belongsTo Event)
This is the model of Event:

Ext.define("UnivMobile.model.Event", {
extend: "Ext.data.Model",
requieres:'UnivMobile.model.Media',




config: {

fields:[
{ name: 'id' },
{ name: 'titre'},
{ name: 'description'},
{ name: 'date_deb'},
{ name: 'date_fin'},
{ name: 'lieu'}

],
hasMany: [{
model: 'UnivMobile.model.Media',
name:'Media',

}]


}
});

And this is the model of Media:
Ext.define("UnivMobile.model.Media", {
extend: "Ext.data.Model",




config: {

fields:[
{ name: 'id' },
{ name: 'filename'},
{ name: 'dir'},
{ name: 'mimetype'},
{ name: 'filesize'},
{ name: 'created'},
{ name: 'modified'},
{ name: 'event_id'}
],
belongsTo: [{ model: 'UniMobile.model.Event', associationKey: 'event_id' }],
}
});

This is the store of Events:
Ext.define("UnivMobile.store.Events", {
extend: "Ext.data.Store",


config:{

model: "UnivMobile.model.Event",
proxy:{
type:'ajax',
url:'http://localhost/UniversiteCakeUploadEssai/events/web',

reader: {
type: 'json',
record:'Event',
}





},
autoLoad:true

}


});
This is the store of Medias:
Ext.define("UnivMobile.store.Medias", {
extend: "Ext.data.Store",



config:{

model: "UnivMobile.model.Media",
proxy:{
type:'ajax',
url:'http://localhost/UniversiteCakeUploadEssai/media/web',
reader: {
type: 'json',
record:'Media'
}


},
autoLoad:true
}

});

And finally this is JSON data of events:

[{"Event":{"id":"6","titre":"AgileTour","description":"Decouvrir la m\u00e9thodologie Agile","date_deb":"","date_fin":"","lieu":"Esprit"},"Media":[{"id":"53","filename":"149787_414631291941737_714868681_n.jpg","dir":"upload\/6","mimetype":"image\/jpeg","filesize":"10978","created":"2012-12-25 19:59:38","modified":"2012-12-25 19:59:38","event_id":"6"},{"id":"54","filename":"68596_414630785275121_726648910_n.jpg","dir":"upload\/6","mimetype":"image\/jpeg","filesize":"93849","created":"2012-12-25 20:00:32","modified":"2012-12-25 20:00:32","event_id":"6"},{"id":"55","filename":"3451_414631238608409_595777429_n.jpg","dir":"upload\/6","mimetype":"image\/jpeg","filesize":"62381","created":"2012-12-25 20:00:50","modified":"2012-12-25 20:00:50","event_id":"6"},{"id":"59","filename":"simpsons (1).mov","dir":"upload\/6","mimetype":"video\/quicktime","filesize":"99279","created":"2012-12-26 11:43:46","modified":"2012-12-26 11:43:46","event_id":"6"}]},{"Event":{"id":"7","titre":"Blackberry Jam","description":"la nouvelle plateforme Blackberry 10 ","date_deb":"","date_fin":"","lieu":"Esprit"},"Media":[{"id":"56","filename":"14281_10200182854122365_2051486553_n.jpg","dir":"upload\/7","mimetype":"image\/jpeg","filesize":"72591","created":"2012-12-25 20:06:55","modified":"2012-12-25 20:06:55","event_id":"7"},{"id":"57","filename":"559912_264352283687703_857349258_n.jpg","dir":"upload\/7","mimetype":"image\/jpeg","filesize":"121070","created":"2012-12-25 20:07:54","modified":"2012-12-25 20:07:54","event_id":"7"},{"id":"58","filename":"198386_4522570615889_511505037_n.jpg","dir":"upload\/7","mimetype":"image\/jpeg","filesize":"53981","created":"2012-12-25 20:08:10","modified":"2012-12-25 20:08:10","event_id":"7"}]}]

There are 2 events and each one have its medias.
In my view :
I can access to informatiosn event's(titre,description),but I cannot display Media and its informations,I get an empty array,this is the code view:
Ext.define("UnivMobile.view.InfoEvents", {
extend: 'Ext.Container',

xtype:'events-show',

initialize:function(){


var store=Ext.getStore("Events");
store.load({
callback: function() {

var event = store.first();


console.log(event.get('Media'))



// event.Media.each(function(media) {

// console.log("Media id: " + media.getId());





// });
}
});




},



config:{
title: 'Information',
store:'Events',


items: [
{
id: 'content',
tpl: [

'<div style="margin-left:100px">{titre} </div>',
'{description}',
'{lieu}',
'{filename}'//I cannot display this


]

}
],


record: null
},
updateRecord: function(newRecord) {
if (newRecord) {
this.down('#content').setData(newRecord.data);



}
}

});
Please how can I display data of medias(filename.....) for each event???