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[英]How to access input of state machine in any node at AWS Step Functions
[英]Access Map State ( item ) in Step functions
我正在嘗試訪問我正在使用 Map state 迭代的項目屬性。我不斷收到此錯誤:
Value ($['Map'].snapshot_id.S) for parameter snapshotId is invalid. Expected: 'snap-...'. (Service: Ec2, Status Code: 400, Request ID: 6fc02935-c161-49df-8606-bc6f3e2934a6)
我瀏覽了文檔,它似乎建議使用$.Map.snapshot_id.S
進行訪問,但似乎不起作用。 同時,Map的一個輸入項是:
{
"snapshot_id": {
"S": "snap-01dd5ee46df84119e"
},
"file_type": {
"S": "bash"
},
"id": {
"S": "64e6893261d94669b7a8ca425233d68b"
},
"script_s3_link": {
"S": "df -h"
}
}
Map state 定義:
"Map": {
"Type": "Map",
"ItemProcessor": {
"ProcessorConfig": {
"Mode": "INLINE"
},
"StartAt": "Parallel State",
"States": {
"Parallel State": {
"Comment": "A Parallel state can be used to create parallel branches of execution in your state machine.",
"Type": "Parallel",
"Branches": [
{
"StartAt": "CreateVolume",
"States": {
"CreateVolume": {
"Type": "Task",
"Parameters": {
"AvailabilityZone": "us-east-2b",
"SnapshotId": "$$.Map.snapshot_id.S"
},
"Resource": "arn:aws:states:::aws-sdk:ec2:createVolume",
"Next": "AttachVolume"
},
"AttachVolume": {
"Type": "Task",
"Parameters": {
"Device": "MyData",
"InstanceId": "MyData",
"VolumeId": "MyData"
},
"Resource": "arn:aws:states:::aws-sdk:ec2:attachVolume",
"End": true
}
}
}
],
"End": true
}
}
},
"Next": "Final Result",
"ItemsPath": "$.Items",
"MaxConcurrency": 40
},
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