在 BASH 中使用 jq 将数组附加到 json

Question

我有一个如下所示的 json：

{
    "failedSet": [],
    "successfulSet": [{
        "event": {
            "arn": "arn:aws:health:us-east-1::event/AWS_RDS_MAINTENANCE_SCHEDULED_xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxx",
            "endTime": 1502841540.0,
            "eventTypeCategory": "scheduledChange",
            "eventTypeCode": "AWS_RDS_MAINTENANCE_SCHEDULED",
            "lastUpdatedTime": 1501208541.93,
            "region": "us-east-1",
            "service": "RDS",
            "startTime": 1502236800.0,
            "statusCode": "open"
        },
        "eventDescription": {
            "latestDescription": "We are contacting you to inform you that one or more of your Amazon RDS DB instances is scheduled to receive system upgrades during your maintenance window between August 8 5:00 PM and August 15 4:59 PM PDT. Please see the affected resource tab for a list of these resources. \r\n\r\nWhile the system upgrades are in progress, Single-AZ deployments will be unavailable for a few minutes during your maintenance window. Multi-AZ deployments will be unavailable for the amount of time it takes a failover to complete, usually about 60 seconds, also in your maintenance window. \r\n\r\nPlease ensure the maintenance windows for your affected instances are set appropriately to minimize the impact of these system upgrades. \r\n\r\nIf you have any questions or concerns, contact the AWS Support Team. The team is available on the community forums and by contacting AWS Premium Support. \r\n\r\nhttp://aws.amazon.com/support\r\n"
        }
    }]
}

我正在尝试使用 jq 在 successfulSet[].event 下添加一个新键/值（键名为 affectedEntities），我已经看到了一些示例，例如 here 和 here，但没有一个答案真正展示了如何添加一个可能的具有多个值的键（我说可能的原因是因为到目前为止，AWS 正在为受影响的实体返回一个值，但如果还有更多，那么我想列出它们） .

编辑：我要添加的新键的值存储在一个名为 $affected_entities 的变量中，该值的示例如下所示：

[
    "arn:aws:acm:us-east-1:xxxxxxxxxxxxxx:certificate/xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx"
]

该值可能如下所示：

[
    "arn:aws:acm:us-east-1:xxxxxxxxxxxxxx:certificate/xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx", 
    "arn:aws:acm:us-east-1:xxxxxxxxxxxxxx:certificate/xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx",
    ...
    ...
    ...
]

Answer 1

你可以用这个jq，

jq '.successfulSet[].event += { "new_key" : "new_value" }' file.json

编辑：

试试这个：

jq --argjson argval "$new_value" '.successfulSet[].event += { "affected_entities" : $argval }' file.json

测试：

sat~$ new_value='[
    "arn:aws:acm:us-east-1:xxxxxxxxxxxxxx:certificate/xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx"
]'

sat~$ jq --argjson argval "$new_value" '.successfulSet[].event += { "affected_entities" : $argval }' file.json

请注意，--argjson 适用于 jq 1.5 及更高版本。