Mapping mongoDb document to extjs model

[hijeane]

Hi guys, how can i map mongo document with nested props to extjs model with associations and then use reference to this model in my ViewModel ?

My JSON data:

{   
 "host": "name",    
 "config": {
        "application": {            
               "prop": true, 
                "prop2": "somestring"  
        },  
      "mail": { 
           "server": "somestring" 
       } 
   }
} 

Right now my model and viewModel looks like : http://pastebin.com/i28XqjW8 , but i have some problems with bind existing record (newly created seems ok..) to my form in modal edit-window,
1. Loop errors :

[E] TypeError: Cannot read property 'document' of undefined

2. Record not be dirty when i edit nested props

[hijeane]

i solve problem:
1. using mapping field property
2. custom json writer for mapping property
3. bind without ViewModel