从 JSON 中提取 ID 按值过滤

Question

我有以下 JSON 文件

{
    "businessEventData": [
        {
            "businessEvent": {
                "header": {
                    "moduleName": "Reservation",
                    "primaryKey": "45901",
                    "createdDateTime": "2021-09-26 11:58:03.0"
                }
            }
        },
        {
            "businessEvent": {
                "header": {
                    "moduleName": "Reservation",
                    "primaryKey": "45901",
                    "createdDateTime": "2021-09-26 11:58:15.0"
                }
                
            }
            
        },
         {
            "businessEvent": {
                "header": {
                    "moduleName": "Profile",
                    "primaryKey": "45902",
                    "createdDateTime": "2021-09-25 11:58:03.0"
                }
            }
        }
    ]
}

我需要提取 json 对象中的 primaryKey，其中 moduleName 等于“Reservation”。我想要的输出是：

[
  "45901",
  "45901"
]

如果我运行 followig json路径 $..header[?@.moduleName == "Reservation"].primaryKey 我没有得到任何输出。

另外，有没有办法获得具有 jsonPath 的唯一列表？而不是：

[
  "45901",
  "45901"
]

得到

 [
   "45901"
 ]

Answer 1

I need to extract the primaryKey in the json object where the moduleName is equal to "Reservation".

不是 jsonpath，而是 python 1 行

data = {
    "businessEventData": [
        {
            "businessEvent": {
                "header": {
                    "moduleName": "Reservation",
                    "primaryKey": "45901",
                    "createdDateTime": "2021-09-26 11:58:03.0"
                }
            }
        },
        {
            "businessEvent": {
                "header": {
                    "moduleName": "Reservation",
                    "primaryKey": "45901",
                    "createdDateTime": "2021-09-26 11:58:15.0"
                }

            }

        },
        {
            "businessEvent": {
                "header": {
                    "moduleName": "Profile",
                    "primaryKey": "45902",
                    "createdDateTime": "2021-09-25 11:58:03.0"
                }
            }
        }
    ]
}

values = [x['businessEvent']['header']['primaryKey'] for x in data['businessEventData'] if
          x['businessEvent']['header']['moduleName'] == 'Reservation']

print(values)

输出

['45901', '45901']

Answer 2

怎么样：

$.businessEventData[?(@.businessEvent.header.moduleName=='Reservation')]..header.primaryKey

从 JSON 中提取 ID 按值过滤

extract ID from JSON filtering by value

jsonpath