Use for loop instead of map to modify iterables

Previously we use map() to apply changes to every item in a iterable
object, but this is not a proper usage. And in Python3, map() will
return a map iterator object, changes will not be applied immediately,
as we're not iterating the map object, changes will never be applied.
Changing to for loop instead fixes.

Partial-Bug: #1755413

Change-Id: Iebbfaca67cda72300636e51686bac3b1513b127d
Signed-off-by: Zhao Chao <zhaochao1984@gmail.com>

trove_dashboard/content/database_clusters/views.py

@@ -86,7 +86,8 @@ class IndexView(horizon_tables.DataTableView):
             msg = _('Unable to retrieve database clusters.')
             exceptions.handle(self.request, msg)
 
-        map(self._extra_data, clusters)
+        for cluster in clusters:
+            self._extra_data(cluster)
 
         return clusters
 

trove_dashboard/content/databases/tabs.py

@@ -113,8 +113,8 @@ class DatabaseTab(tabs.TableTab):
         instance = self.tab_group.kwargs['instance']
         try:
             data = api.trove.database_list(self.request, instance.id)
-            add_instance = lambda d: setattr(d, 'instance', instance)
-            map(add_instance, data)
+            for database in data:
+                setattr(database, 'instance', instance)
         except Exception:
             msg = _('Unable to get databases data.')
             exceptions.handle(self.request, msg)

trove_dashboard/content/databases/views.py

@@ -80,7 +80,8 @@ class IndexView(horizon_tables.DataTableView):
             instances = []
             msg = _('Unable to retrieve database instances.')
             exceptions.handle(self.request, msg)
-        map(self._extra_data, instances)
+        for instance in instances:
+            self._extra_data(instance)
         return instances