Question

我想用示例数据制作一张表，但是我的对象可以有多个主题，并且主题内可以有多个帖子。

[  
   {  
      "topicName":"First topic",
      "postInformations":[  
         {  
            "postName":"First post",
            "postNumbers":{  
               "number1":111,
               "number2":222,
               "number3":333
            }
         }
      ],
      "topicNumbers":{  
         "number1":123,
         "number2":456,
         "number3":789
      }
   }
]

那就是我想要达到的目标：

|[topicName | postName ]|[number1]|[number2]|[number3]|
| First topic           |     111 |     222 |     333 |
|    First post         |     444 |     555 |     666 |

通常我会在HTML中通过一栏设置一列来轻松地做到这一点，但是我不知道主题有多少个帖子，主题有多少个。

有什么主意如何使其与未知的帖子和主题兼容？

Answer 1

您可以使用嵌套的ngFor。这样的事情。

select dc_id, Mosah_code, **field_x, field_y**, [31] , [32] ,[33], [34]
from (select dc.dc_id, dc.Mosah_code, **field_x, field_y**, dp.Sapak_code, dp.DC_Pprice_after_discount from DcnezekCloudAuction dc
left join DcnezekCloudAuctionParts dp on dc.dc_id = dp.DC_ID and dp.Mosah_code = dc.Mosah_code) as S
pivot
(
sum (DC_Pprice_after_discount)
FOR Sapak_Code IN ([31], [32], [33], [34])
)AS P

元素未知量的嵌套表

1 个答案: