Assignment failure BUG, should not have made the mistake

Steps:

 1. In a for loop so written: 

supGoodsPrice.add (subOrderGood.getPrice ()); 

2. Then after the loop assignment:

order.setSupGoodsPrice (supGoodsPrice); 

3. order last saved to the database:

orderMapper.addOneOrder (order); 


Results:
  
 Save the value sup_goods_price library is empty. . . . . . 

Taibuyinggai low-level errors committed, step 1

supGoodsPrice.add (subOrderGood.getPrice ()); 

no assignment is successful, should be changed to supGoodsPrice = supGoodsPrice.add (subOrderGood.getPrice ()) ; 


Note:

 later still have to carefully point, to write good code, do not bug manufacturing By. Or how to achieve "China Dream."