[SalesForce] Getting picklist values for record type through REST API

The standard REST API only provides doing object describes on single objects at a time. http://www.salesforce.com/us/developer/docs/api_rest/Content/dome_sobject_basic_info.htm

You could try creating a custom REST API using Apex REST and returning the map of objects:

Map<String, Schema.SObjectType> gd = Schema.getGlobalDescribe(); 

You would have to cast the Schema.SObjectType object to a custom object first before returning it though.

Something like the following...

@RestResource(urlMapping='/RT/*')
global class RESTTest 
{
    @HttpPost
    global static Map<String, TestObj> getGlobalDescribe()
    {
        //TODO: iterate through Schema.getGlobalDescribe() method results and
        //cast results to custom object below

        return null;
    }

    global class TestObj
    {
        global String name;
        //TODO: add more properties as needed
    }
}

This code hasn't been tested by the way, is just meant to help point you in the right direction.

Check out more information on Dynamic Apex here: http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_dynamic_describe_objects_understanding.htm#apex_describe_object_access_all

Let me know if you have any questions.

Not sure about ForceTK ,may be this is not implemented by library yet or safe harbour and I am not sure .

But normally through standard REST API we can implement this using below REST Service

/services/data/v33.0/sobjects/Account/describe/layouts/

For different object you can change Object name and versions

/vXX.X/sobjects/Object/describe/layouts/

I just checked my dev console and it does return values as expected .There is a recordtype mappings that can give you various picklists needed

I see you are using visualforce and hence if you use visualforce you can directly call this REST API from Visualforce using Jquery and it will not require any ForceTK(Although I love forceTk)

      <apex:page>
     <apex:includeScript value="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js"/>
    <script>
     jQuery(document).ready(function($) {
     // Pull 10 Accounts via the REST API
      $.ajax('/services/data/v33.0/sobjects/Account/describe/layouts/',
    {
      beforeSend: function(xhr) {
        // Set the OAuth header from the session ID
        xhr.setRequestHeader('Authorization', 'Bearer {!$Api.Session_ID}');
      },
      success: function(response) {
        // We got 'em - append our records to the HTML list
        $.each(response.records, function(index, record) {
          $('#responselist').append('<li>'+record.recordTypeMappings+'</li>');
        });
      },
      error: function(jqXHR, textStatus, errorThrown) {
        // Oops - what went wrong?
        alert(jqXHR.status + ': ' + errorThrown);
      }
    }
  );
    });
  </script>
   <h1>Test REST API Without Proxy</h1>
     <p>Data:</p>
        <ul id="responselist">
     </ul>
  </apex:page>