我正在使用AWS步骤函数,尝试从任务结果中仅选择特定数据。出于某些难以理解的原因,AWS选择不允许在步骤函数中使用Query
,因此我正在使用ResultsSelector
。但是,我对所需的JSONPath感到困惑。
如何使用ResultsSelector
构建所需的JSON对象?
以这个结果为例 -
{
"IsTruncated": false,
"KeyMarker": "",
"MaxKeys": 1000,
"Name": "some-bucket-name",
"Prefix": "some/prefix/",
"VersionIdMarker": "",
"Versions": [
{
"ETag": "\"02e9c20b7cd36fcf6e47926c26f0b39e\"",
"IsLatest": true,
"Key": "some/prefix/my.file",
"LastModified": "2021-09-30T15:34:59Z",
"Owner": {
"Id": "1fd170056d1480a7c1c9b43f5bf0603d91cbabc4ec77eefdcaa10218c3a920f6"
},
"Size": 69606,
"StorageClass": "STANDARD",
"VersionId": "y6XzRsCUZcXMPHqwwnhAGLwTlmPoj9dj"
},
{
"ETag": "\"01bc5b65afe6b0cc0722fc5da32a8a44\"",
"IsLatest": false,
"Key": "some/prefix/my.file",
"LastModified": "2021-09-30T15:34:21Z",
"Owner": {
"Id": "1fd170056d1480a7c1c9b43f5bf0603d91cbabc4ec77eefdcaa10218c3a920f6"
},
"Size": 69407,
"StorageClass": "STANDARD",
"VersionId": "jPdKeUqnYlf0_eNXzHaYCvDfdHLOvRX7"
}
]
}
我希望使用
ResultsSelector
来构建这个JSON对象 -{
"Objects": [
{
"Key": "some/prefix/my.file",
"VersionId": "y6XzRsCUZcXMPHqwwnhAGLwTlmPoj9dj"
},
{
"Key": "some/prefix/my.file",
"VersionId": "jPdKeUqnYlf0_eNXzHaYCvDfdHLOvRX7"
}
]
}
然而,到目前为止,我能够做到的最接近的方法是使用这个 -
{
"Key.$": "$.Versions[*].Key",
"VersionId.$": "$.Versions[*].VersionId"
}
这让我得到了这个 -
{
"VersionId": [
"y6XzRsCUZcXMPHqwwnhAGLwTlmPoj9dj",
"jPdKeUqnYlf0_eNXzHaYCvDfdHLOvRX7",
],
"Key": [
"some/prefix/my.file",
"some/prefix/my.file"
]
}