--- a/src/pyams_utils/session.py	Wed Jul 12 13:55:47 2017 +0200
+++ b/src/pyams_utils/session.py	Wed Jul 12 13:56:41 2017 +0200
@@ -18,6 +18,42 @@
 # import interfaces
 
 # import packages
+from pyams_utils.request import check_request
+
+
+_marker = object()
+
+
+def session_property(app, key=None, prefix=None):
+    """Define a method decorator used to store result into request's session
+
+    If no request is currently running, a new one is created.
+
+    :param str app: application identifier used to prefix session keys
+    :param str key: session's value key; if *None*, the key will be the method's object; if *key* is a callable
+        object, il will be called to get the actual session key
+    :param prefix: str; prefix to use for session key; if *None*, the prefix will be the property name
+    """
+
+    def session_decorator(func):
+
+        def wrapper(obj, app, key, *args, **kwargs):
+            request = check_request()
+            if callable(key):
+                key = key(obj, *args, **kwargs)
+            if not key:
+                key = '{1}::{0!r}'.format(obj, prefix or func.__name__)
+            data = get_session_data(request, app, key, _marker)
+            if data is _marker:
+                data = func
+                if callable(data):
+                    data = data(obj, *args, **kwargs)
+                set_session_data(request, app, key, data)
+            return data
+
+        return lambda x, *args, **kwargs: wrapper(x, app, key, *args, **kwargs)
+
+    return session_decorator
 
 
 def get_session_data(request, app, key, default=None):