Made prepare call look up true resource type by resource id

Because of alternate resource types in the URL instead of a real type, prepare was failing.

Same issue with the backbone forms edit schema, so this was moved into the call for retrieving the prepare object itself - just added as another field.  One less AJAX call.

main.py

@@ -556,7 +556,7 @@ def edit(resource_type, resource_id):
 @app.route('/resource_type_edit/<resource_type>/<resource_id>/', methods=['GET', 'PUT'])
 def resource_type_edit(resource_type, resource_id):
     if request.method == 'GET':
-        resource = ServiceApi.get_prepare(resource_type, resource_id, None)
+        resource = ServiceApi.get_prepare(resource_type, resource_id, None, True)
         return render_json_response(resource)
     if request.method == 'PUT':
         data = json.loads(request.data)

service_api.py

@@ -600,7 +600,13 @@ def create_resource(resource_type, org_id):
         return [resp, resp2]
 
     @staticmethod
-    def get_prepare(resource_type, resource_id, user_id):
+    def get_prepare(resource_type, resource_id, user_id, get_backbone_schema=False):
+
+        # because of the way the UI changes the type that comes in here, we can't really trust it
+        # this means we need to read the resource to get the type first then use that.
+        res = service_gateway_get('resource_registry', 'read', params={'object_id': resource_id})
+        resource_type = res['type_']
+
         if resource_type == 'InstrumentDevice':
             params = {}
             if resource_id:
@@ -640,6 +646,10 @@ def get_prepare(resource_type, resource_id, user_id):
 
             prepare = service_gateway_get('resource_registry', 'prepare_resource_support', params=params)
 
+        # now, get the backbone schema if requested, using the converted type we got above
+        if get_backbone_schema:
+            prepare['resource_backbone_schema'] = ServiceApi.resource_type_schema(resource_type)
+
         return prepare
 
     """

static/js/ux-editform.js

@@ -227,14 +227,7 @@ IONUX.Models.EditResourceModel = Backbone.Model.extend({
   },
 
   get_resource_type_schema: function(){
-    /* NOTE: this is a blocking ajax call (async:false) */
-    var url = "/resource_type_schema/"+this.resource_type + "/"; 
-    var data = null;
-    $.ajax({url:url, type:"GET", dataType:"json", async:false})
-      .always(function(){})
-      .done(function(resp){data = resp;})
-      .fail(function(){})
-    return data["schema"];
+    return this.prepare.resource_backbone_schema;
   },
 
   nest_depth: function(val){