bitbake: toaster: Add an invalidate cache method on data update signal

Instead of relying on the cache expiring over an amount of time we can
listen to the changed notification on the models to invalidate the
cache. Also fixes overlapping cache names.

(Bitbake rev: eb0b1450e421cf65b407b1ac0336ac24ffc626e8)

Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/toastergui/widgets.py

@@ -245,6 +245,9 @@ class ToasterTable(View):
         for key, val in request.GET.iteritems():
             cache_name = cache_name + str(key) + str(val)
 
+        for key, val in kwargs.iteritems():
+            cache_name = cache_name + str(key) + str(val)
+
         data = cache.get(cache_name)
 
         if data:
@@ -306,8 +309,7 @@ class ToasterTable(View):
         except FieldError:
             print "Error: Requested field does not exist"
 
-
         data = json.dumps(data, indent=2, cls=DjangoJSONEncoder)
-        cache.set(cache_name, data, 10)
+        cache.set(cache_name, data, 60*30)
 
         return data