asp.net - Angularjs resource sending empty object to api controller -

hi have agularjs resources below working fine.

return {         formdis: $resource('/api/pdisc/:id', { id: '@id' }, { update: { method: 'post' } })     }; 

angularjs cotroller using resource

$scope.submit = function (form) {         console.log(form.dis.length);         console.log(form.dis);         (var = 0; < form.dis.length; i++) {                    prepository.formdis.update(form.dis[i], function () {                 {                     alert("saved");                 }             });              };     }; 

webconfig

config.routes.maphttproute(             name: "defaultapi",             routetemplate: "api/{controller}/{id}",             defaults: new { id = routeparameter.optional }         ); 

mvc api recieving

// post api/projdisc         public httpresponsemessage postproject_discussion(pdis pdis)         {                           db.project_discussion.add(pdis);                 db.savechanges();                   } 

class

 [datacontract(isreference = false)]     [serializable]     public partial class pdis     {         public int pdis_id { get; set; }         public int pro_id { get; set; }         public string message {get; set;}          public virtual pro pro { get; set; }         public virtual people people { get; set; }     } } 

when run error in api @

db.project_discussion.add(pdis);  

error

  exception of type 'system.data.entity.validation.dbentityvalidationexception' occurred in entityframework.dll not handled in user code 

i error because api receiving empty object. in angular controller can see objects in console being passed form. once object submitted resource , api there wrong ends empty object. please let me know how fix it.

based on comment:

i can see right data being {"pro_id":"221","message":"sdsfsd" pdis_id:""}

my best guess model binder not able convert pdis type.

one thing notice property pdis_id int (non-nullable), , passing pdis_id:"". think model binder not know in case.

try supplying integer value pdis_id, or not supplying @ all.