[Fix] fix bugs for newly added functions

tests/trader/test_database.py

@@ -3,48 +3,46 @@ Test if database works fine
 """
 import os
 import unittest
+from copy import copy
 from datetime import datetime, timedelta
 
 from vnpy.trader.constant import Exchange, Interval
 from vnpy.trader.database.database import Driver
 from vnpy.trader.object import BarData, TickData
 
-os.environ['VNPY_TESTING'] = '1'
+os.environ["VNPY_TESTING"] = "1"
 
-profiles = {
+profiles = {Driver.SQLITE: {"driver": "sqlite", "database": "test_db.db"}}
-    Driver.SQLITE: {
+if "VNPY_TEST_ONLY_SQLITE" not in os.environ:
-        "driver": "sqlite",
+    profiles.update(
-        "database": "test_db.db",
+        {
-    }
-}
-if 'VNPY_TEST_ONLY_SQLITE' not in os.environ:
-    profiles.update({
             Driver.MYSQL: {
                 "driver": "mysql",
-            "database": os.environ['VNPY_TEST_MYSQL_DATABASE'],
+                "database": os.environ["VNPY_TEST_MYSQL_DATABASE"],
-            "host": os.environ['VNPY_TEST_MYSQL_HOST'],
+                "host": os.environ["VNPY_TEST_MYSQL_HOST"],
-            "port": int(os.environ['VNPY_TEST_MYSQL_PORT']),
+                "port": int(os.environ["VNPY_TEST_MYSQL_PORT"]),
                 "user": os.environ["VNPY_TEST_MYSQL_USER"],
-            "password": os.environ['VNPY_TEST_MYSQL_PASSWORD'],
+                "password": os.environ["VNPY_TEST_MYSQL_PASSWORD"],
             },
             Driver.POSTGRESQL: {
                 "driver": "postgresql",
-            "database": os.environ['VNPY_TEST_POSTGRESQL_DATABASE'],
+                "database": os.environ["VNPY_TEST_POSTGRESQL_DATABASE"],
-            "host": os.environ['VNPY_TEST_POSTGRESQL_HOST'],
+                "host": os.environ["VNPY_TEST_POSTGRESQL_HOST"],
-            "port": int(os.environ['VNPY_TEST_POSTGRESQL_PORT']),
+                "port": int(os.environ["VNPY_TEST_POSTGRESQL_PORT"]),
                 "user": os.environ["VNPY_TEST_POSTGRESQL_USER"],
-            "password": os.environ['VNPY_TEST_POSTGRESQL_PASSWORD'],
+                "password": os.environ["VNPY_TEST_POSTGRESQL_PASSWORD"],
             },
             Driver.MONGODB: {
                 "driver": "mongodb",
-            "database": os.environ['VNPY_TEST_MONGODB_DATABASE'],
+                "database": os.environ["VNPY_TEST_MONGODB_DATABASE"],
-            "host": os.environ['VNPY_TEST_MONGODB_HOST'],
+                "host": os.environ["VNPY_TEST_MONGODB_HOST"],
-            "port": int(os.environ['VNPY_TEST_MONGODB_PORT']),
+                "port": int(os.environ["VNPY_TEST_MONGODB_PORT"]),
                 "user": "",
                 "password": "",
                 "authentication_source": "",
             },
-    })
+        }
+    )
 
 
 def now():
@@ -69,17 +67,53 @@ tick = TickData(
 
 
 class TestDatabase(unittest.TestCase):
-
     def connect(self, settings: dict):
         from vnpy.trader.database.initialize import init  # noqa
+
         self.manager = init(settings)
 
+    def assertBarCount(self, count, msg):
+        bars = self.manager.load_bar_data(
+            symbol=bar.symbol,
+            exchange=bar.exchange,
+            interval=bar.interval,
+            start=bar.datetime - timedelta(days=1),
+            end=now()
+        )
+        self.assertEqual(count, len(bars), msg)
+
+    def assertTickCount(self, count, msg):
+        ticks = self.manager.load_tick_data(
+            symbol=bar.symbol,
+            exchange=bar.exchange,
+            start=bar.datetime - timedelta(days=1),
+            end=now()
+        )
+        self.assertEqual(count, len(ticks), msg)
+
+    def assertNoData(self, msg):
+        self.assertBarCount(0, msg)
+        self.assertTickCount(0, msg)
+
+    def setUp(self) -> None:
+        # clean all data first
+        for driver, settings in profiles.items():
+            self.connect(settings)
+            self.manager.clean(bar.symbol)
+            self.assertNoData("Failed to clean data!")
+            self.manager = None
+
+    def tearDown(self) -> None:
+        self.manager.clean(bar.symbol)
+        self.assertNoData("Failed to clean data!")
+
     def test_upsert_bar(self):
         for driver, settings in profiles.items():
             with self.subTest(driver=driver, settings=settings):
                 self.connect(settings)
                 self.manager.save_bar_data([bar])
                 self.manager.save_bar_data([bar])
+                self.assertBarCount(1, "there should be only one item after upsert")
 
     def test_save_load_bar(self):
         for driver, settings in profiles.items():
@@ -88,16 +122,7 @@ class TestDatabase(unittest.TestCase):
                 # save first
                 self.manager.save_bar_data([bar])
 
-                # and load
+                self.assertBarCount(1, "there should be only one item after save")
-                results = self.manager.load_bar_data(
-                    symbol=bar.symbol,
-                    exchange=bar.exchange,
-                    interval=bar.interval,
-                    start=bar.datetime - timedelta(seconds=1),  # time is not accuracy
-                    end=now() + timedelta(seconds=1),  # time is not accuracy
-                )
-                count = len(results)
-                self.assertNotEqual(count, 0)
 
     def test_upsert_tick(self):
         for driver, settings in profiles.items():
@@ -105,6 +130,7 @@ class TestDatabase(unittest.TestCase):
                 self.connect(settings)
                 self.manager.save_tick_data([tick])
                 self.manager.save_tick_data([tick])
+                self.assertTickCount(1, "there should be only one item after upsert")
 
     def test_save_load_tick(self):
         for driver, settings in profiles.items():
@@ -113,16 +139,48 @@ class TestDatabase(unittest.TestCase):
                 # save first
                 self.manager.save_tick_data([tick])
 
-                # and load
+                self.assertTickCount(1, "there should be only one item after save")
-                results = self.manager.load_tick_data(
+
-                    symbol=bar.symbol,
+    def test_newest_bar(self):
-                    exchange=bar.exchange,
+        for driver, settings in profiles.items():
-                    start=bar.datetime - timedelta(seconds=1),  # time is not accuracy
+            with self.subTest(driver=driver, settings=settings):
-                    end=now() + timedelta(seconds=1),  # time is not accuracy
+                self.connect(settings)
+
+                # an older one
+                older_one = copy(bar)
+                older_one.volume = 123.0
+                older_one.datetime = now() - timedelta(days=1)
+
+                # and a newer one
+                newer_one = copy(bar)
+                newer_one.volume = 456.0
+                newer_one.datetime = now()
+                self.manager.save_bar_data([older_one, newer_one])
+
+                got = self.manager.get_newest_bar_data(
+                    bar.symbol, bar.exchange, bar.interval
                 )
-                count = len(results)
+                self.assertEqual(got.volume, newer_one.volume, "the newest bar we got mismatched")
-                self.assertNotEqual(count, 0)
+
+    def test_newest_tick(self):
+        for driver, settings in profiles.items():
+            with self.subTest(driver=driver, settings=settings):
+                self.connect(settings)
+
+                # an older one
+                older_one = copy(tick)
+                older_one.volume = 123
+                older_one.datetime = now() - timedelta(days=1)
+
+                # and a newer one
+                newer_one = copy(tick)
+                older_one.volume = 456
+                newer_one.datetime = now()
+                self.manager.save_tick_data([older_one, newer_one])
+
+                got = self.manager.get_newest_tick_data(tick.symbol, tick.exchange)
+                self.assertEqual(got.volume, newer_one.volume, "the newest tick we got mismatched")
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()

vnpy/trader/database/database.py

@@ -1,7 +1,7 @@
 from abc import ABC, abstractmethod
 from datetime import datetime
 from enum import Enum
-from typing import Sequence, TYPE_CHECKING, Optional
+from typing import Optional, Sequence, TYPE_CHECKING
 
 if TYPE_CHECKING:
     from vnpy.trader.constant import Interval, Exchange  # noqa
@@ -76,3 +76,10 @@ class BaseDatabaseManager(ABC):
         otherwise, return None
         """
         pass
+
+    @abstractmethod
+    def clean(self, symbol: str):
+        """
+        delete all records for a symbol
+        """
+        pass

vnpy/trader/database/database_mongo.py

@@ -322,8 +322,8 @@ class MongoManager(BaseDatabaseManager):
             .order_by("-datetime")
             .first()
         )
-        if len(s):
+        if s:
-            return list(s)[0]
+            return s.to_bar()
         return None
 
     def get_newest_tick_data(
@@ -334,6 +334,10 @@ class MongoManager(BaseDatabaseManager):
             .order_by("-datetime")
             .first()
         )
-        if len(s):
+        if s:
-            return list(s)[0]
+            return s.to_tick()
         return None
+
+    def clean(self, symbol: str):
+        DbTickData.objects(symbol=symbol).delete()
+        DbBarData.objects(symbol=symbol).delete()

vnpy/trader/database/database_sql.py

@@ -1,6 +1,6 @@
 """"""
 from datetime import datetime
-from typing import List, Sequence, Type
+from typing import List, Optional, Sequence, Type
 
 from peewee import (
     AutoField,
@@ -367,3 +367,40 @@ class SqlManager(BaseDatabaseManager):
     def save_tick_data(self, datas: Sequence[TickData]):
         ds = [self.class_tick.from_tick(i) for i in datas]
         self.class_tick.save_all(ds)
+
+    def get_newest_bar_data(
+        self, symbol: str, exchange: "Exchange", interval: "Interval"
+    ) -> Optional["BarData"]:
+        s = (
+            self.class_bar.select()
+            .where(
+                (self.class_bar.symbol == symbol)
+                & (self.class_bar.exchange == exchange.value)
+                & (self.class_bar.interval == interval.value)
+            )
+            .order_by(self.class_bar.datetime.desc())
+            .first()
+        )
+        if s:
+            return s.to_bar()
+        return None
+
+    def get_newest_tick_data(
+        self, symbol: str, exchange: "Exchange"
+    ) -> Optional["TickData"]:
+        s = (
+            self.class_tick.select()
+            .where(
+                (self.class_tick.symbol == symbol)
+                & (self.class_tick.exchange == exchange.value)
+            )
+            .order_by(self.class_tick.datetime.desc())
+            .first()
+        )
+        if s:
+            return s.to_tick()
+        return None
+
+    def clean(self, symbol: str):
+        self.class_bar.delete().where(self.class_bar.symbol == symbol).execute()
+        self.class_tick.delete().where(self.class_tick.symbol == symbol).execute()

vnpy/trader/utility.py

@@ -4,7 +4,7 @@ General utility functions.
 
 import json
 from pathlib import Path
-from typing import Callable, TYPE_CHECKING
+from typing import Callable
 
 import numpy as np
 import talib