Restore the duration computation.

modules/selector.py

@@ -214,7 +214,7 @@ class MySelector(SelectorActiveItems):
             row (gluon.dal.Row): row of the history table.
 
         Returns:
-            datetime.timedelta:
+            float: in seconds
 
         """
         value = timedelta(seconds=0)
@@ -232,7 +232,7 @@ class MySelector(SelectorActiveItems):
         elif start and end and end < now:
             value = end - start
 
-        return value
+        return value.total_seconds()
 
     def _fte(self, row):
         """Compute the full time equivalent of the person associated

static/track_events/src/reprDuration.js

@@ -2,7 +2,7 @@
  * Convert a duration in nanosecond into a string.
  *
  * @param {Number} value
- * The duration in nanoseconds
+ * The duration in seconds
  *
  * @return {String}
  * The duration express as the number of year + the number of months e.g. "3y + 09m"
@@ -12,7 +12,7 @@ function reprDuration(value) {
 
     "use strict";
 
-    var duration = value / 1.E9,
+    var duration = value,
         month,
         nd,
         nm,