jq: error:语法错误，意外的if，在检查对象是否存在时，如果不是添加默认值

Question

获取错误

jq: error: syntax error, unexpected if (Unix shell quoting issues?) at <top-level> while parsing kubernetes kubectl command,
kubectl get pv -o=json | jq -c '.items[] | {name: .metadata.name, claimName: .spec | if has("claimRef") then .claimRef.name else empty end }'

尝试获得有PVC的PV，如果没有PVC可以为null或空。对于它建立一个映射的名称和各自的PVC，否则为空或null。

下面是jq命令的输入示例或命令kubectl get pv -o=json

的输出示例

{
"apiVersion": "v1",
"items": [{
"apiVersion": "v1",
"kind": "PersistentVolume",
"metadata": {
"annotations": {
"meta.helm.sh/release-name": "",
"meta.helm.sh/release-namespace": ""
},
"creationTimestamp": "",
"finalizers": [
""
],
"labels": {
"app.kubernetes.io/managed-by": ""
},
"name": "",
"resourceVersion": "",
"uid": ""
},
"spec": {
"accessModes": [
"ReadWriteMany"
],
"capacity": {
"storage": ""
},
"claimRef": {
"apiVersion": "",
"kind": "",
"name": "",
"namespace": "",
"resourceVersion": "",
"uid": ""
},
"csi": {
"driver": "",
"volumeHandle": ""
},
"persistentVolumeReclaimPolicy": "",
"volumeMode": ""
},
"status": {
"phase": ""
}
},
{
"apiVersion": "v1",
"kind": "PersistentVolume",
"metadata": {
"annotations": {
"meta.helm.sh/release-name": "",
"meta.helm.sh/release-namespace": ""
},
"creationTimestamp": "",
"finalizers": [
""
],
"labels": {
"app.kubernetes.io/managed-by": ""
},
"name": "",
"resourceVersion": "",
"uid": ""
},
"spec": {
"accessModes": [
"ReadWriteMany"
],
"capacity": {
"storage": ""
},
"claimRef": {
"apiVersion": "",
"kind": "",
"name": "",
"namespace": "",
"resourceVersion": "",
"uid": ""
},
"csi": {
"driver": "",
"volumeHandle": ""
},
"persistentVolumeReclaimPolicy": "",
"volumeMode": ""
},
"status": {
"phase": ""
}
}
],
"kind": "List",
"metadata": {
"resourceVersion": "",
"selfLink": ""
}
}

为了数据安全，已删除数据，只保留密钥请帮助

Answer 1

将claimName字段的值用圆括号括起来:

{
name: .metadata.name,
claimName: (.spec | if has("claimRef") then .claimRef.name else empty end)
}

根据您对示例的简化程度，您可以考虑将if语句简化为:

{
name: .metadata.name,
claimName: (.spec.claimRef.name? // empty)
}

注意，在这两种情况下，如果各自的测试将失败，不仅.claimName，而且整个对象将消失。