Question

我有db的json响应。

    {"StudentId":"1","SubjectId":"1","Mark":"61"}{"StudentId":"1","SubjectId":"2","Mark":"75"}{"StudentId":"1","SubjectId":"3","Mark":"87"}{"StudentId":"2","SubjectId":"1","Mark":"82"}{"StudentId":"2","SubjectId":"2","Mark":"64"}{"StudentId":"2","SubjectId":"3","Mark":"77"}

我想转换为

{"StudentId":"1",
    "Mark":[ "1":"61", "2":"75", "3":"87" ]
}
{"StudentId":"2",
    "Mark":[ "1":"82", "2":"64", "3":"77" ]
}

通过使用这个，我想生成一个html表。

Answer 1

您是否有机会使用Couchbase？在N1QL中，这种转换非常容易。这是查询：

SELECT data.StudentId, OBJECT v.SubjectId:v.Mark FOR v IN ARRAY_AGG(data) END as Mark
FROM [{"StudentId":"1","SubjectId":"1","Mark":"61"}, 
      {"StudentId":"1","SubjectId":"2","Mark":"75"}, 
      {"StudentId":"1","SubjectId":"3","Mark":"87"}, 
      {"StudentId":"2","SubjectId":"1","Mark":"82"}, 
      {"StudentId":"2","SubjectId":"2","Mark":"64"}, 
      {"StudentId":"2","SubjectId":"3","Mark":"77"}] data
GROUP BY data.StudentId

大概您将用查询替换FROM子句中的硬编码数组以首先获取数据。

以下是输出：

[
  {
    "Mark": {
      "1": "61",
      "2": "75",
      "3": "87"
    },
    "StudentId": "1"
  },
  {
    "Mark": {
      "1": "82",
      "2": "64",
      "3": "77"
    },
    "StudentId": "2"
  }
]

Answer 2

{"StudentId":"1","SubjectId":"1","Mark":"61"}, 
{"StudentId":"1","SubjectId":"2","Mark":"75"}, 
{"StudentId":"1","SubjectId":"3","Mark":"87"}, 
{"StudentId":"2","SubjectId":"1","Mark":"82"}, 
{"StudentId":"2","SubjectId":"2","Mark":"64"}, 
{"StudentId":"2","SubjectId":"3","Mark":"77"}

在数据库中，我有一个结果表，其属性为StudentId，SubjectId，Mark 我获取了数据并转换为JSON。我终于想要这种格式的数据。

[
  {
    "Mark": {
      "1": "61",
      "2": "75",
      "3": "87"
    },
    "StudentId": "1"
  },
  {
    "Mark": {
      "1": "82",
      "2": "64",
      "3": "77"
    },
    "StudentId": "2"
  }
]

如何将数据库结果行转换为嵌套的json格式

2 个答案: