如何将 null 转换为空字符串？

Question

我需要将具有 null 值的 JSON 转换为空字符串，将 UNKNOWN 字符串转换为空字符串。

这是我的 JSON 长相。

  {
    "dmarId": 11536,
    "salesForceRegion": "Unknown",
    "industryVertical": null,
    "modifiedDate": "2020-03-10T06:00:56"
  },
  {
    "dmarId": 543,
    "salesForceRegion": null,
    "industryVertical": null,
    "modifiedDate": "2020-03-10T06:00:56"
  }
]

输出Json：

[
  {
    "dmarId": 11536,
    "salesForceRegion": "",
    "industryVertical": "",
    "modifiedDate": "2020-03-10T06:00:56"
  },
  {
    "dmarId": 543,
    "salesForceRegion": "",
    "industryVertical": "",
    "modifiedDate": "2020-03-10T06:00:56"
  }
]

我不知道如何创建规范来使用此配置。

Answer 1

这有效，

[
  {
    "operation": "shift",
    "spec": {
      "*": {
        "dmarId": "[].dmarId",
        "modifiedDate": "[&1].modifiedDate",
        "salesForceRegion": {
          "Unknown|null": {
            "# ": "[&3].salesForceRegion"
          }
        },
        "industryVertical": {
          "Unknown|null": {
            "# ": "[&3].industryVertical"
          }
        }
      }
    }
  },
  {
    "operation": "modify-default-beta",
    "spec": {
      "*": {
        "salesForceRegion": "",
        "industryVertical": ""
      }
    }
  }
]

如何将 null 转换为空字符串？

How to transform null to empty string?

json

jolt