如果属性已存在于主要对象中，则不应在 Jolt 中引用次要对象

Question

在给定的 JSON 输入中，主要对象是“Account”。目标是创建一个 Jolt 规范，仅当“Account”对象中尚不存在这些属性时，该规范才会有选择地从“SystemResponse”对象中选取属性。例如，如果“serviceFlag”存在于“SystemResponse”中但不存在于“Account”中，则应将其添加到“Account”中。但是，如果“resellerFlag”（映射到“Account”中的“isReseller”）等属性和其他属性已存在于“Account”对象中，则应忽略它们。

请帮助我实现这个有条件的房产选择。

输入.json

{
  "Account": {
    "AccountInfo": {
      "isReseller": 10,
      "poRequired": 10
    }
  },
  "SystemResponse": {
    "resellerFlag": "false",
    "poRequiredFlag": "false",
    "serviceFlag": "true"
  }
}

输出.json

[
  {
    "operation": "shift",
    "spec": {
      "Account": {
        "AccountInfo": {
          "*": "Account.AccountInfo.&"
        }
      },
      "SystemResponse": {
        "@resellerFlag": {
          "false": {
            // Check if isReseller doesn't already exist in Account
            "Account.AccountInfo.isReseller": {
              "#0": "partyAccount.eqxAccountInfo.isReseller"
            }
          }
        },
        "poRequiredFlag": {
          "false": {
            // Check if poRequired doesn't already exist in Account
            "@Account.AccountInfo.poRequired": {
              "#0": "Account.AccountInfo.poRequired"
            }
          }
        },
        "serviceFlag": {
          "false": {
            // Check if poRequired doesn't already exist in Account
            "@Account.AccountInfo.isService": {
              "#0": "Account.AccountInfo.isService"
            }
          },
          "true": {
            // Check if poRequired doesn't already exist in Account
            "@Account.AccountInfo.isService": {
              "#1": "Account.AccountInfo.isService"
            }
          }
        }
      }
    }
  }
]

实际产量

{
  "Account" : {
    "AccountInfo" : {
      "isReseller" : 10,
      "poRequired" : 10
    }
  }
}

预期输出json

{
  "Account" : {
    "AccountInfo" : {
      "isReseller" : 10,
      "poRequired" : 10,
      "isService" : 1
    }
  }
}

Answer 1

您可以使用

~

运算符来处理此类问题。这意味着如果相应的属性不存在或为空，则与应用的返回值匹配，例如在以下转换中

[
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "Account": {
        "AccountInfo": {
          "~isReseller": "@(3,SystemResponse.resellerFlag)",
          "~poRequired": "@(3,SystemResponse.poRequiredFlag)", 
          "~serviceFlag": "@(3,SystemResponse.serviceFlag)"
        }
      }
    }
  },
  {
    "operation": "shift",
    "spec": {
      "Account": {
        "AccountInfo": {
          "*": {
            "true": {
              "#1": "&4.&3.&2"
            },
            "false": {
              "#0": "&4.&3.&2"
            },
            "*": { // leave the rest as they are
              "@1": "&4.&3.&2"
            }
          }
        }
      }
    }
  },
  {
    "operation": "modify-overwrite-beta",
    "spec": {
      "Account": {
        "AccountInfo": {
          "*": "=toInteger" // convert quoted integers unquoted
        }
      }
    }
  }
]