Unify functions and make it easy to get a list of filled buy orders

freqtrade/persistence/models.py

@@ -614,15 +614,25 @@ class LocalTrade():
         else:
             return None
 
+    def select_filled_orders(self, order_side: str) -> List['Order']:
+        """
+        Finds filled orders for this orderside.
+        :param order_side: Side of the order (either 'buy' or 'sell')
+        :return: array of Order objects
+        """
+        return [o for o in self.orders if o.ft_order_side == order_side and
+                  o.ft_is_open is False and
+                  (o.filled or 0) > 0 and
+                  o.status in NON_OPEN_EXCHANGE_STATES]
+
     @property
     def nr_of_successful_buys(self) -> int:
         """
         Helper function to count the number of buy orders that have been filled.
         :return: int count of buy orders that have been filled for this trade.
         """
-        return len([o for o in self.orders if o.ft_order_side == 'buy' and
-                    o.status in NON_OPEN_EXCHANGE_STATES and
-                    (o.filled or 0) > 0])
+
+        return len(self.select_filled_orders('buy'))
 
     @property
     def nr_of_successful_sells(self) -> int:
@@ -630,9 +640,7 @@ class LocalTrade():
         Helper function to count the number of sell orders that have been filled.
         :return: int count of sell orders that have been filled for this trade.
         """
-        return len([o for o in self.orders if o.ft_order_side == 'sell' and
-                    o.status in NON_OPEN_EXCHANGE_STATES and
-                    (o.filled or 0) > 0])
+        return len(self.select_filled_orders('sell'))
 
     @staticmethod
     def get_trades_proxy(*, pair: str = None, is_open: bool = None,

tests/test_persistence.py

@@ -1663,3 +1663,49 @@ def test_recalc_trade_from_orders_ignores_bad_orders(fee):
     assert trade.fee_open_cost == 2 * o1_fee_cost
     assert trade.open_trade_value == 2 * o1_trade_val
     assert trade.nr_of_successful_buys == 2
+
+
+@pytest.mark.usefixtures("init_persistence")
+def test_select_filled_orders(fee):
+    create_mock_trades(fee)
+
+    trades = Trade.get_trades().all()
+
+    # Closed buy order, no sell order
+    orders = trades[0].select_filled_orders('buy')
+    assert orders is not None
+    assert len(orders) == 1
+    order = orders[0]
+    assert order.amount > 0
+    assert order.filled > 0
+    assert order.side == 'buy'
+    assert order.ft_order_side == 'buy'
+    assert order.status == 'closed'
+    orders = trades[0].select_filled_orders('sell')
+    assert orders is not None
+    assert len(orders) == 0
+
+    # closed buy order, and closed sell order
+    orders = trades[1].select_filled_orders('buy')
+    assert orders is not None
+    assert len(orders) == 1
+
+    orders = trades[1].select_filled_orders('sell')
+    assert orders is not None
+    assert len(orders) == 1
+
+    # Has open buy order
+    orders = trades[3].select_filled_orders('buy')
+    assert orders is not None
+    assert len(orders) == 0
+    orders = trades[3].select_filled_orders('sell')
+    assert orders is not None
+    assert len(orders) == 0
+
+    # Open sell order
+    orders = trades[4].select_filled_orders('buy')
+    assert orders is not None
+    assert len(orders) == 1
+    orders = trades[4].select_filled_orders('sell')
+    assert orders is not None
+    assert len(orders) == 0