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I hope that title makes sense... I'm very new to doing anything with Javascript, and I've been searching for a while now.

I'm using Node-RED to receive an HTTP POST containing JSON. I have the following data being posted in msg.req.body, and want to pull out objects inside of targets:

    {
    "policy_url": "https://alerts.newrelic.com/accounts/xxxxx/policies/7477",
    "condition_id": 429539,
    "condition_name": "Error rate",
    "account_id": 773524,
    "event_type": "INCIDENT",
    "runbook_url": null,
    "severity": "CRITICAL",
    "incident_id": 50,
    "version": "1.0",
    "account_name": "Inc",
    "timestamp": 1436451988232,
    "details": "Error rate > 5% for at least 3 minutes",
    "incident_acknowledge_url": "https://alerts.newrelic.com/accounts/xxxxxx/incidents/50/acknowledge",
    "owner": "Jared Seaton",
    "policy_name": "Default Policy",
    "incident_url": "https://alerts.newrelic.com/accounts/xxxxxx/incidents/50",
    "current_state": "acknowledged",
    "targets": [{
        "id": "6002060",
        "name": "PHP Application",
        "link": "https://rpm.newrelic.com/accounts/xxxxxx/applications/6002060?tw[start]=1436450194&tw[end]=1436451994",
        "labels": {

        },
        "product": "APM",
        "type": "Application"
    }]
}

I want to format a string to send via TCP to insert an event into our event management system. So I tried the following:

msg.payload = msg.req.body.targets[0] + "|" + msg.req.body.severity + "|" + msg.req.body.current_state + "|" + msg.req.body.details + "|" + msg.req.body.condition_name + "\n\n";
return(msg);

This results in a message of:

[object Object]|CRITICAL|acknowledged|Error rate > 5% for at least 3 minutes|Error rate

I've tried a few different things, but I either get a null return, or the [object Object]. It feels like I'm close...

Can anyone assist?

Thanks in advance.

4

2 回答 2

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target[0]是一个对象，这就是你看到 [object Object] 的原因。

您应该改为msg.req.body.targets[0].name访问该对象的属性。

结果消息看起来像这样

PHP Application|CRITICAL|acknowledged|Error rate > 5% for at least 3 minutes|Error rate
于 2015-07-09T16:41:08.633 回答
0

你想要 JSON.stringify()

msg.payload = JSON.stringify(msg.req.body.targets[0]) + "|" + msg.req.body.severity + "|" + msg.req.body.current_state + "|" + msg.req.body.details + "|" + msg.req.body.condition_name + "\n\n";
return(msg);

这会将存储在目标数组的第一个槽中的对象转换为它的字符串表示形式。

于 2015-07-09T16:47:55.720 回答