通过键值映射需要 NodeJS JSON 响应答案

【问题标题】：NodeJS JSON response required through key value mapping通过键值映射需要 NodeJS JSON 响应
【发布时间】：2022-01-16 18:58:51
【问题描述】：

如果事件不可用，则获取一些事件及其数据，我们必须设置零值。获取如下数据，

  "result" : {
      "2" : {
      "buckets" : [
        {
          "3" : {
            "buckets" : [
              
              {
                "key" : "updated",
                "doc_count" : 5
              },
              {
                "key" : "created",
                "doc_count" : 3
              },
              {
                "key" : "deleted",
                "doc_count" : 3
              }
            ]
          }
        },
        {
          "3" : {
            "buckets" : [
              {
                "key" : "created",
                "doc_count" : 1
              },
              {
                "key" : "deleted",
                "doc_count" : 1
              }
            ]
          }
        },
        {
          
          "3" : {
            "buckets" : [
              {
                "key" : "created",
                "doc_count" : 46
              }
            ]
          }
        }
      ]
    }
    }

期望的响应： {"chartData":{"dataset":[{"label":"created","data":[3,1,46,]},{"label":"updated","data":[5, 0,0]},{"label":"deleted","data":[3,1,0]}]}}

如何动态设置标签和数据？

【问题讨论】：

请澄清您的具体问题或提供更多详细信息以准确突出您的需求。正如目前所写的那样，很难准确地说出你在问什么。

标签： node.js key-value

【解决方案1】：

您需要先初始化空项，然后重新构建数据并将数据映射到您的预期结构。

const input = {
      "2" : {
      "buckets" : [
        {
          "3" : {
            "buckets" : [
              
              {
                "key" : "updated",
                "doc_count" : 5
              },
              {
                "key" : "created",
                "doc_count" : 3
              },
              {
                "key" : "deleted",
                "doc_count" : 3
              }
            ]
          }
        },
        {
          "3" : {
            "buckets" : [
              {
                "key" : "created",
                "doc_count" : 1
              },
              {
                "key" : "deleted",
                "doc_count" : 1
              }
            ]
          }
        },
        {
          
          "3" : {
            "buckets" : [
              {
                "key" : "created",
                "doc_count" : 46
              }
            ]
          }
        }
      ]
    }
}

const decoratedInputs = input['2']['buckets']
  .map(item => {
    const rawItems = item['3']['buckets']
    const formattedItems = []
    const created = rawItems.find(item => item.key === 'created')
    if (!created) {
      // init created item
      formattedItems.push({key: 'created', doc_count: 0})
    } else {
      formattedItems.push(created)
    }
    
    const deleted = rawItems.find(item => item.key === 'deleted')
    if (!deleted) {
      // init deleted item
      formattedItems.push({key: 'deleted', doc_count: 0})
    } else {
      formattedItems.push(deleted)
    }
    
    const updated = rawItems.find(item => item.key === 'updated')
    if (!updated) {
      // init updated item
      formattedItems.push({key: 'updated', doc_count: 0})
    } else {
      formattedItems.push(updated)
    }
    
    return formattedItems
  })

const result = {
  chartData: {
    dataset: [
      {
        label: 'created',
        data: decoratedInputs.map(item => {
          const created = item.find(item => item.key === 'created')
          return created.doc_count
        })
      },
      {
        label: 'updated',
        data: decoratedInputs.map(item => {
          const updated = item.find(item => item.key === 'updated')
          return updated.doc_count
        })
      },
      {
        label: 'deleted',
        data: decoratedInputs.map(item => {
          const deleted = item.find(item => item.key === 'deleted')
          return deleted.doc_count
        })
      }
    ]
  }
}

 console.log(result)

【讨论】：