Json jolt 通配符如何用于 RHS

我在试着理解‘#’外卡的工作原理.

在准备ProductList时，我在规范中使用了‘#’，它起作用了，并且我得到了符合我预期的输出.但我不确定它是不是起作用了.

有没有人能帮我了解一下它的工作原理？

Here is the input JSON个

{
  "orders": [
    {
      "order_parts": [
        {
          "id": "0001",
          "items": [
            {
              "id": "00101",
              "goodIdentificationList": [
                {
                  "goodIdentificationTypeId": "UPCA",
                  "idValue": "42684666380437"
                },
                {
                  "idValue": "V-ASHBY",
                  "goodIdentificationTypeId": "SHOPIFY_PROD_SKU"
                }
              ],
              "productName": "BLACK / 6 / 809"
            },
            {
              "id": "00102",
              "goodIdentificationList": [
                {
                  "goodIdentificationTypeId": "SHOPIFY_PROD_ID",
                  "idValue": "42684666380437"
                },
                {
                  "idValue": "V-ASHBY",
                  "goodIdentificationTypeId": "UPCA"
                }
              ],
              "productName": "BLACK / 6 / 809"
            }
          ]
        },
        {
          "id": "0002",
          "items": [
            {
              "id": "00103",
              "goodIdentificationList": [
                {
                  "goodIdentificationTypeId": "SHOPIFY_PROD_ID",
                  "idValue": "42684666380437"
                },
                {
                  "idValue": "V-ASHBY",
                  "goodIdentificationTypeId": "UPCA"
                }
              ],
              "productName": "BLACK / 6 / 809"
            }
          ]
        }
      ]
    }
  ]
}

以下规格预期:-

1. 判断好的每个标识列表的映射，获取idValue where goodIdentificationTypeId - UPCA，并将ProductList作为gtin放入.

2. 从Items列表中获取id，并将其作为Itemid放入ProductList中.

3. 从Items列表中获取ProductName并将其作为名称放入ProductList中.

Jolt Spec is like below个

[
  {
    "operation": "shift",
    "spec": {
      "orders": {
        "*": {
          "order_parts": {
            "*": {
              "items": {
                "*": {
                  "goodIdentificationList": {
                    "*": {
                      "goodIdentificationTypeId": {
                        "UPCA": {
                          "@(2,idValue)": "[&5].productList.[#8].gtin"
                        }
                      }
                    }
                  },
                  "id": "[&1].productList.[#4].itemId",
                  "productName": "[&1].productList.[#4].name"
                }
              }
            }
          }
        }
      }
    }
  },
  {
    "operation": "shift",
    "spec": {
      "*": {
        "productList": {
          "*": "productList.[]"
        }
      }
    }
  }

]

By the above spec, I'm able to prepare the productList as I was expecting.
But want to understand the working of '#' here.

Output JSON个

{
  "productList" : [ {
    "itemId" : "00101",
    "name" : "BLACK / 6 / 809"
  }, {
    "itemId" : "00103",
    "name" : "BLACK / 6 / 809"
  }, {
    "itemId" : "00102",
    "name" : "BLACK / 6 / 809"
  } ]
}

任何帮助都将不胜感激. 谢谢!