VRFS-1442 refresh session band list each time entering step3

web/app/assets/javascripts/jam_rest.js

@@ -443,6 +443,16 @@
           });
         }
 
+        function getBands(userId) {
+          var url = "/api/users/" + userId + "/bands";
+          return $.ajax({
+             type: "GET",
+             dataType: "json",
+             url: url,
+             processData:false
+          });
+        }
+
         function getSession(id) {
             var url = "/api/sessions/" + id;
             return $.ajax({

web/app/assets/javascripts/scheduled_session.js.erb

@@ -215,6 +215,17 @@
     }
 
     function beforeShowStep3() {
+      rest.getBands(context.JK.currentUserId)
+        .done(function(result) {
+          var options = $("#session-band-list");
+          options.empty();
+          options.append($("<option />").val('').text('No'));
+          $.each(result, function(idx, item) {
+            options.append($("<option />").attr('value',item.id).text(item.name));
+          });
+          context.JK.dropdown($bandList);
+        })
+        .fail(app.ajaxError)
     }
 
     function beforeShowStep4() {

web/app/views/clients/_scheduledSession.html.erb

@@ -242,9 +242,6 @@
                   <h3 class="session-band-list-header">Is this a band session?</h3>
                   <select id="session-band-list">
                     <option value="">No</option>
-                    <% current_user.bands.each do |band| %>
-                      <option value="<%= band.id %>"><%= band.name[0..64] %></option>
-                    <% end %>
                   </select>
                   <div class="clearall"></div>
                   <h3 class="session-language-list-header">What language will be spoken?</h3>