remove caching, optimize rate/query

asset.py

@@ -8,10 +8,9 @@ from trytond.transaction import Transaction
 from trytond.pool import Pool
 from trytond.pyson import Eval, Bool, And, If, Date
 from trytond.report import Report
-from trytond.cache import MemoryCache
 
 from decimal import Decimal
-from datetime import time
+from datetime import time, datetime
 from sql.functions import CurrentDate, CurrentTimestamp, Round, Extract
 from sql.conditionals import Case, Coalesce, NullIf
 from sql import Literal
@@ -120,8 +119,6 @@ class Asset(SymbolMixin, ModelSQL, ModelView):
         readonly=True, model_name='investment.rate'),
         'get_rate_data')
 
-    _asset_cache = MemoryCache('investment.asset.values', duration=600, context=False)
-
     @classmethod
     def __register__(cls, module_name):
         """ register and migrate
@@ -453,7 +450,7 @@ class Asset(SymbolMixin, ModelSQL, ModelView):
                 tab_today.rate,
                 (tab_today.rate * 100.0 / NullIf(tab_rate2.rate, 0.00) - 100.0).as_('percent'),
                 distinct_on=[tab_today.id],
-                order_by=[tab_today.id, tab_today.date.desc]
+                order_by=[tab_today.id, tab_rate2.date.desc]
             )
         return query
 
@@ -557,21 +554,6 @@ class Asset(SymbolMixin, ModelSQL, ModelView):
         asset_id_lst = [x.id for x in assets]
 
         for x in names:
-            # try to get values from cache
-            ids_todo = []
-            for id1 in asset_id_lst:
-                c_val = cls._asset_cache.get('%(fname)s-%(id)d' % {
-                    'fname': x,
-                    'id': id1,
-                    })
-                if c_val is None:
-                    ids_todo.append(id1)
-                else :
-                    result[x][id1] = c_val
-
-            if len(ids_todo) == 0:
-                continue
-
             tab_percent = cls.get_percentage_sql(
                 days={
                     'change_day1': 0,
@@ -580,7 +562,7 @@ class Asset(SymbolMixin, ModelSQL, ModelView):
                     'change_month6': 180,
                     'change_month12': 365,
                     }[x],
-                asset_ids=ids_todo
+                asset_ids=asset_id_lst,
                 )
             cursor.execute(*tab_percent)
             records = cursor.fetchall()
@@ -588,10 +570,6 @@ class Asset(SymbolMixin, ModelSQL, ModelView):
             for record in records:
                 result[x][record[0]] = record[3].quantize(exp) \
                         if record[3] is not None else None
-                cls._asset_cache.set('%(fname)s-%(id)d' % {
-                    'fname': x,
-                    'id': record[0],
-                    }, result[x][record[0]])
         return result
 
     @classmethod

rate.py

@@ -17,7 +17,7 @@ class Rate(SymbolMixin, ModelSQL, ModelView):
         select=True, ondelete='CASCADE',
         model_name='investment.asset')
     date = fields.Date(string='Date', required=True, select=True)
-    rate = fields.Numeric(string='Rate', required=True,
+    rate = fields.Numeric(string='Rate', required=True, select=True,
         digits=(16, Eval('asset_digits', 4)),
         depends=['asset_digits'])
 

tests/test_asset.py

@@ -375,7 +375,7 @@ class AssetTestCase(ModuleTestCase):
             }])
         self.assertEqual(asset1.rates[0].date, date(2022, 5, 16))
         self.assertEqual(asset1.rates[1].date, date(2022, 5, 10))
-        #self.assertEqual(asset1.change_day1, None)
+        self.assertEqual(asset1.change_day1, None)
 
     @with_transaction()
     def test_asset_percentges_values(self):