Add average column to orders table

freqtrade/persistence/migrations.py

@@ -123,6 +123,27 @@ def migrate_open_orders_to_trades(engine):
         """)
 
 
+def migrate_orders_table(decl_base, inspector, engine, table_back_name: str, cols: List):
+    # Schema migration necessary
+    engine.execute(f"alter table orders rename to {table_back_name}")
+    # drop indexes on backup table
+    for index in inspector.get_indexes(table_back_name):
+        engine.execute(f"drop index {index['name']}")
+
+    # let SQLAlchemy create the schema as required
+    decl_base.metadata.create_all(engine)
+
+    engine.execute(f"""
+        insert into orders ( id, ft_trade_id, ft_order_side, ft_pair, ft_is_open, order_id, status,
+        symbol, order_type, side, price, amount, filled, average, remaining, cost, order_date,
+        order_filled_date, order_update_date)
+        select id, ft_trade_id, ft_order_side, ft_pair, ft_is_open, order_id, status,
+        symbol, order_type, side, price, amount, filled, null average, remaining, cost, order_date,
+        order_filled_date, order_update_date
+        from {table_back_name}
+        """)
+
+
 def check_migrate(engine, decl_base, previous_tables) -> None:
     """
     Checks if migration is necessary and migrates if necessary
@@ -145,6 +166,11 @@ def check_migrate(engine, decl_base, previous_tables) -> None:
         logger.info('Moving open orders to Orders table.')
         migrate_open_orders_to_trades(engine)
     else:
-        pass
+        cols_order = inspector.get_columns('orders')
+
+        if not has_column(cols_order, 'average'):
+            tabs = get_table_names_for_table(inspector, 'orders')
             # Empty for now - as there is only one iteration of the orders table so far.
-        # table_back_name = get_backup_name(tabs, 'orders_bak')
+            table_back_name = get_backup_name(tabs, 'orders_bak')
+
+            migrate_orders_table(decl_base, inspector, engine, table_back_name, cols)

freqtrade/persistence/models.py

@@ -122,6 +122,7 @@ class Order(_DECL_BASE):
     order_type = Column(String, nullable=True)
     side = Column(String, nullable=True)
     price = Column(Float, nullable=True)
+    average = Column(Float, nullable=True)
     amount = Column(Float, nullable=True)
     filled = Column(Float, nullable=True)
     remaining = Column(Float, nullable=True)
@@ -150,6 +151,7 @@ class Order(_DECL_BASE):
         self.price = order.get('price', self.price)
         self.amount = order.get('amount', self.amount)
         self.filled = order.get('filled', self.filled)
+        self.average = order.get('average', self.average)
         self.remaining = order.get('remaining', self.remaining)
         self.cost = order.get('cost', self.cost)
         if 'timestamp' in order and order['timestamp'] is not None:

tests/test_persistence.py

@@ -627,6 +627,22 @@ def test_migrate_new(mocker, default_conf, fee, caplog):
     assert orders[1].order_id == 'stop_order_id222'
     assert orders[1].ft_order_side == 'stoploss'
 
+    caplog.clear()
+    # Drop latest column
+    engine.execute("alter table orders drop average")
+    # Run init to test migration
+    init_db(default_conf['db_url'], default_conf['dry_run'])
+
+    assert log_has("trying orders_bak0", caplog)
+
+    orders = Order.query.all()
+    assert len(orders) == 2
+    assert orders[0].order_id == 'buy_order'
+    assert orders[0].ft_order_side == 'buy'
+
+    assert orders[1].order_id == 'stop_order_id222'
+    assert orders[1].ft_order_side == 'stoploss'
+
 
 def test_migrate_mid_state(mocker, default_conf, fee, caplog):
     """