clean some comments

- fix: error if actions are empty in balance stats

kfet/views.py

@@ -2049,9 +2049,10 @@ class PkUrlMixin(object):
 
 
 class SingleResumeStat(JSONDetailView):
-    """
+    """Manifest for a kind of a stat about an object.
-    Summarize all the stats of an object
+
-    Handles JSONResponse
+    Returns JSON whose payload is an array containing descriptions of a stat:
+    url to retrieve data, label, ...
 
     """
     id_prefix = ''
@@ -2095,9 +2096,8 @@ class SingleResumeStat(JSONDetailView):
 ID_PREFIX_ACC_BALANCE = "balance_acc"
 
 
-# Un résumé de toutes les vues ArticleStatBalance
-# REND DU JSON
 class AccountStatBalanceList(PkUrlMixin, SingleResumeStat):
+    """Manifest for balance stats of an account."""
     model = Account
     context_object_name = 'account'
     pk_url_kwarg = 'trigramme'
@@ -2138,12 +2138,10 @@ class AccountStatBalanceList(PkUrlMixin, SingleResumeStat):
 
 
 class AccountStatBalance(PkUrlMixin, JSONDetailView):
-    """
+    """Datasets of balance of an account.
-    Returns a JSON containing the evolution a the personnal
+
-    balance of a trigramme between timezone.now() and `nb_days`
+    Operations and Transfers are taken into account.
-    ago (specified to the view as an argument)
+
-    takes into account the Operations and the Transfers
-    does not takes into account the balance offset
     """
     model = Account
     pk_url_kwarg = 'trigramme'
@@ -2253,8 +2251,9 @@ class AccountStatBalance(PkUrlMixin, JSONDetailView):
             "values": changes,
         }]
         context['is_time_chart'] = True
-        context['min_date'] = changes[-1]['at']
+        if len(changes) > 0:
-        context['max_date'] = changes[0]['at']
+            context['min_date'] = changes[-1]['at']
+            context['max_date'] = changes[0]['at']
         # TODO: offset
         return context
 
@@ -2278,9 +2277,8 @@ ID_PREFIX_ACC_LAST_WEEKS = "last_weeks_acc"
 ID_PREFIX_ACC_LAST_MONTHS = "last_months_acc"
 
 
-# Un résumé de toutes les vues ArticleStatLast
-# NE REND PAS DE JSON
 class AccountStatOperationList(PkUrlMixin, SingleResumeStat):
+    """Manifest for operations stats of an account."""
     model = Account
     context_object_name = 'account'
     pk_url_kwarg = 'trigramme'
@@ -2301,10 +2299,7 @@ class AccountStatOperationList(PkUrlMixin, SingleResumeStat):
 
 
 class AccountStatOperation(ScaleMixin, PkUrlMixin, JSONDetailView):
-    """
+    """Datasets of operations of an account."""
-    Returns a JSON containing the evolution a the personnal
-    consommation of a trigramme at the diffent dates specified
-    """
     model = Account
     pk_url_kwarg = 'trigramme'
     context_object_name = 'account'
@@ -2363,9 +2358,8 @@ ID_PREFIX_ART_LAST_WEEKS = "last_weeks_art"
 ID_PREFIX_ART_LAST_MONTHS = "last_months_art"
 
 
-# Un résumé de toutes les vues ArticleStatLast
-# NE REND PAS DE JSON
 class ArticleStatSalesList(SingleResumeStat):
+    """Manifest for sales stats of an article."""
     model = Article
     context_object_name = 'article'
     id_prefix = ID_PREFIX_ART_LAST
@@ -2379,10 +2373,7 @@ class ArticleStatSalesList(SingleResumeStat):
 
 
 class ArticleStatSales(ScaleMixin, JSONDetailView):
-    """
+    """Datasets of sales of an article."""
-    Returns a JSON containing the consommation
-    of an article at the diffent dates precised
-    """
     model = Article
     context_object_name = 'article'