使用 JSONPath 从 JSON 获取 object

Question

我在尝试使用 JSONpath 从 JSON 中提取 object 时遇到问题。 JSON 示例：

{
    "version": "0",
    "id": "aa44v2",
    "detail-type": "v2.detail.events.conversation.{id}.attributes",
    "source": "aws.partner/xyz.com/cloud/aa44vv/GCSC",
    "account": "123444545",
    "time": "2023-02-01T08:21:11Z",
    "region": "eu-west-1",
    "resources": [],
    "detail": {
        "topicName": "v2.detail.events.conversation.aa44vv.attributes",
        "version": "2",
        "eventBody": {
            "eventTime": 1675239671240,
            "conversationId": "aa44vv",
            "participantId": "aa44vb",
            "attributes": {
                "Custom2": "b",
                "Custom1": "a"
            }
        },
        "metadata": {
            "CorrelationId": "aa44vr"
        },
        "timestamp": "2023-02-01T08:21:11.240Z"
    }
}

我想提取整个“属性”object，而不是其中包含的值（因为我事先不知道内容，它们是任意键值对）

我只能获取一个数组（通过 $.detail.eventBody.attributes 或 $..attributes），但我需要 object。有什么办法吗？

来自 jsonpath.com 的屏幕截图

谢谢

Answer 1

您将始终获得结果数组，就像您使用g标志检查 RegExp 时一样。

您可以使用lodash / underscore接收 object attributes ：

 const data = { "version": "0", "id": "aa44v2", "detail-type": "v2.detail.events.conversation.{id}.attributes", "source": "aws.partner/xyz.com/cloud/aa44vv/GCSC", "account": "123444545", "time": "2023-02-01T08:21:11Z", "region": "eu-west-1", "resources": [], "detail": { "topicName": "v2.detail.events.conversation.aa44vv.attributes", "version": "2", "eventBody": { "eventTime": 1675239671240, "conversationId": "aa44vv", "participantId": "aa44vb", "attributes": { "Custom2": "b", "Custom1": "a" } }, "metadata": { "CorrelationId": "aa44vr" }, "timestamp": "2023-02-01T08:21:11.240Z" } } let results = jsonpath.query(data, '$.detail.eventBody.attributes'); console.log(_.first(results));

 <script src="https://cdn.jsdelivr.net/npm/jsonpath@1.1.1/jsonpath.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>

可能，如果您在路径中有数组，您可以在结果数组中接收多个对象。 因此，您可以使用 lodash 合并所有结果对象（下划线没有该方法）：

 const data = { "version": "0", "id": "aa44v2", "detail-type": "v2.detail.events.conversation.{id}.attributes", "source": "aws.partner/xyz.com/cloud/aa44vv/GCSC", "account": "123444545", "time": "2023-02-01T08:21:11Z", "region": "eu-west-1", "resources": [], "detail": [{ "topicName": "v2.detail.events.conversation.aa44vv.attributes", "version": "2", "eventBody": { "eventTime": 1675239671240, "conversationId": "aa44vv", "participantId": "aa44vb", "attributes": { "Custom2": "b", "Custom1": "a" } }, "metadata": { "CorrelationId": "aa44vr" }, "timestamp": "2023-02-01T08:21:11.240Z" }, { "topicName": "v2.detail.events.conversation.aa44vv.attributes", "version": "2", "eventBody": { "eventTime": 1675239671240, "conversationId": "aa44vv", "participantId": "aa44vb", "attributes": { "Custom3": "c", "Custom4": "d" } }, "metadata": { "CorrelationId": "aa44vr" }, "timestamp": "2023-02-01T08:21:11.240Z" }] } let results = jsonpath.query(data, '$.detail.*.eventBody.attributes'); console.log(_.merge(...results));

 <script src="https://cdn.jsdelivr.net/npm/jsonpath@1.1.1/jsonpath.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>