ruby on rails - How to write the json file for my code?the parsing data its not displaying in android also? -

i want parse data ror using json,i want parse data name in array

hotelscontroller.erb

respond_to :json, :xml   def index     @hotels = hotel.all      respond_to |format|       format.html # show.html.erb       format.json { render json: @hotels.to_json(:only => [ :name ]) }     end   end 

index.json.erb

{ hotel:   <% @hotels.each |hotel| %>     { 'name': "<%= hotel.name %>" }   <% end %> } 

i write code,is code correct or wrong,it parse name(data) in array.

this parsing url,

http://peaceful-cliffs-6253.herokuapp.com/hotels.json, in url want parse names in array, how can in code

my parsing output showing [ { "name": "karthi" }, { "name": "shreshtt" }, { "name": "jitu" }, { "name": null }, { "name": null }, { "name": null } ] want show model,how can this

{   "contacts": [     {       "id": "c200",       "name": "ravi tamada",       "email": "ravi@gmail.com",       "address": "xx-xx-xxxx,x - street, x - country",       "gender": "male",       "phone": {         "mobile": "+91 0000000000",         "home": "00 000000",         "office": "00 000000"       }     },     {       "id": "c201",       "name": "johnny depp",       "email": "johnny_depp@gmail.com",       "address": "xx-xx-xxxx,x - street, x - country",       "gender": "male",       "phone": {         "mobile": "+91 0000000000",         "home": "00 000000",         "office": "00 000000"       }     },     {       "id": "c202",       "name": "leonardo dicaprio",       "email": "leonardo_dicaprio@gmail.com",       "address": "xx-xx-xxxx,x - street, x - country",       "gender": "male",       "phone": {         "mobile": "+91 0000000000",         "home": "00 000000",         "office": "00 000000"       }     }, 

its above model want do,

with hotel names have display

how display array of names in android using json,

public class androidjsonparsingactivity extends listactivity {      // url make request     private static string url = "http://peaceful-cliffs-6253.herokuapp.com/hotels.json";      // json node names     //private static final string tag_hotel = "hotel";     //private static final string tag_id = "id";     private static final string tag_name = "name";     //private static final string tag_email = "email";     //private static final string tag_address = "address";     //private static final string tag_gender = "gender";     //private static final string tag_phone = "phone";      //private static final string tag_phone_mobile = "mobile";     //private static final string tag_phone_home = "home";     //private static final string tag_phone_office = "office";      // contacts jsonarray     jsonarray hotel;      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);               strictmode.threadpolicy policy = new strictmode.threadpolicy.builder().permitall().build();             strictmode.setthreadpolicy(policy);           // hashmap listview         arraylist<hashmap<string, string>> contactlist = new arraylist<hashmap<string, string>>();          // creating json parser instance         jsonparser jparser = new jsonparser();          // getting json string url         jsonobject json = jparser.getjsonfromurl(url);          try {             // getting array of contacts             hotel = json.getjsonarray(tag_name);              // looping through contacts             for(int = 0; < hotel.length(); i++){                 jsonobject c = hotel.getjsonobject(i);                  // storing each json item in variable                 //string id = c.getstring(tag_id);                 string name = c.getstring(tag_name);                 log.e("name testing", name);                 //string email = c.getstring(tag_email);                 //string address = c.getstring(tag_address);                 //string gender = c.getstring(tag_gender);                  // phone number agin json object                 //jsonobject phone = c.getjsonobject(tag_phone);                 //string mobile = phone.getstring(tag_phone_mobile);                 //string home = phone.getstring(tag_phone_home);                 //string office = phone.getstring(tag_phone_office);                  // creating new hashmap                 hashmap<string, string> map = new hashmap<string, string>();                  // adding each child node hashmap key => value                 //map.put(tag_id, id);                 map.put(tag_name, name);                 //map.put(tag_email, email);                 //map.put(tag_phone_mobile, mobile);                  // adding hashlist arraylist                 contactlist.add(map);             }         } catch (jsonexception e) {             e.printstacktrace();         }           /**          * updating parsed json data listview          * */         listadapter adapter = new simpleadapter(this, contactlist,                 r.layout.list_item,                 new string[] { tag_name, }, new int[] {                         r.id.name,});          setlistadapter(adapter);          // selecting single listview item         listview lv = getlistview();          // launching new screen on selecting single listitem         lv.setonitemclicklistener(new onitemclicklistener() {              @override             public void onitemclick(adapterview<?> parent, view view,                     int position, long id) {                 // getting values selected listitem                 string name = ((textview) view.findviewbyid(r.id.name)).gettext().tostring();                 //string cost = ((textview) view.findviewbyid(r.id.email)).gettext().tostring();                 //string description = ((textview) view.findviewbyid(r.id.mobile)).gettext().tostring();                  // starting new intent                 intent in = new intent(getapplicationcontext(), singlemenuitemactivity.class);                 in.putextra(tag_name, name);                 //in.putextra(tag_email, cost);                 //in.putextra(tag_phone_mobile, description);                 startactivity(in);              }         });        }  } 

this client side code also,its not fetches array of names,i think problem might in jsonarray hotel = null; output of android displaying plain screen without displaying names,

you don't need index.json.erb. type way in hotelscontroller.erb:

def index   @hotels = hotel.all      respond_to |format|       format.html # index.html.erb       hash = {:hotels => @hotels}       format.json { render :json => hash }     end