don't include time zone information

alphamind/data/dbmodel/models.py

@@ -1663,11 +1663,11 @@ class Models(Base):
     )
 
     trade_date = Column(DateTime, primary_key=True, nullable=False)
-    model_desc = Column(JSON, nullable=False)
     portfolio_name = Column(String(30), primary_key=True, nullable=False)
     model_type = Column(String(30), primary_key=True, nullable=False)
     version = Column(BigInteger, primary_key=True, nullable=False)
     update_time = Column(DateTime, nullable=False)
+    model_desc = Column(JSON, nullable=False)
 
 
 if __name__ == '__main__':

alphamind/model/linearmodel.py

@@ -57,7 +57,7 @@ class LinearRegression(ModelBase):
 
     def fit(self, x: np.ndarray, y: np.ndarray):
         self.impl.fit(x, y)
-        self.trained_time = arrow.now().format()
+        self.trained_time = arrow.now().format("YYYY-MM-DD HH:mm:ss")
 
     def predict(self, x: np.ndarray) -> np.ndarray:
         return self.impl.predict(x)