修复CTA模块实时保存策略仓位的bug

vnpy/trader/app/ctaStrategy/ctaEngine.py

@@ -304,6 +304,9 @@ class CtaEngine(object):
             
             self.callStrategyFunc(strategy, strategy.onTrade, trade)
             
+            # 保存策略持仓到数据库
+            self.savePosition(strategy)            
+            
         # 更新持仓缓存数据
         if trade.vtSymbol in self.tickStrategyDict:
             posBuffer = self.posBufferDict.get(trade.vtSymbol, None)
@@ -313,9 +316,6 @@ class CtaEngine(object):
                 self.posBufferDict[trade.vtSymbol] = posBuffer
             posBuffer.updateTradeData(trade)        
             
-        # 保存策略持仓到数据库
-        self.savePosition(strategy)
-            
     #----------------------------------------------------------------------
     def processPositionEvent(self, event):
         """处理持仓推送"""