How do I update Child Iteration date in the Azure bash?

If I want to create iteration under a project iteration. Like Project A has two iteration, WHICH is father iteration and Son iteration. How do I do it using the Azure shell --Bash ?

I don't know how to get the child id from the project.

Project A 
       Father Sprint 
              Father Sprint 1 
              Father Sprint 2
              Son Sprint 
                  Son-Sprint1
                  Son-Sprint2
Son sprint is the child sprint of father sprint




az boards iteration project update --path
                                       [--child-id]
                                       [--finish-date]
                                       [--name]
                                       [--project]
                                       [--start-date]
    
    
    
    az boards iteration project create --name
                                       [--finish-date]
                                       [--path]
                                       [--project]
                                       [--start-date]
    
    az boards iteration project create --name "Sprint 36" --start-date 2019-09-01 --finish-date 2019-09-30
    {
      "attributes": {
        "finishDate": "2019-09-30T00:00:00Z",
        "startDate": "2019-09-01T00:00:00Z"
      },
      "children": null,
      "hasChildren": false,
      "id": 55411,
      "identifier": "af3ef6a7-6551-451b-8f9f-63af7a60fc55",
      "name": "Sprint 36",
      "path": "\\Fabrikam Fiber\\Iteration\\Sprint 36",
      "structureType": "iteration",
      "url": "https://dev.azure.com/fabrikam/56af920d-393b-4236-9a07-24439ccaa85c/_apis/wit/classificationNodes/Iterations/Sprint%2036"
    }

Solution

You can use the command "az boards iteration project list" to list iterations for a project. From the output (JSON type content) of this command, you can get the details information (such as id, name, path, etc..) of all the existing iterations in the specified project.

[UPDATE]

You can do like as below to create the parent sprint and the child sprints:

Use the following command to login to your Azure DevOps Organization. When running this command, you need to provide a valid PAT as the authentication.
```
az devops login --org "https://dev.azure.com/{OrganizationName}"
```

Use the following command to create the parent sprint under the root path.

az boards iteration project create --name {ParentSprintName} --project {ProjectName} --start-date "{StartDate}" --finish-date "{FinishDate}"

Use the following command to create the child sprints under the parent sprint. Normally, the {RootName} is same as the {ProjectName} by default.

az boards iteration project create --name {ChildSprintName} --project {ProjectName} --path "\\{RootName}\\Iteration\\{ParentSprintName}" --start-date "{StartDate}" --finish-date "{FinishDate}"