Convert Json input to CSV output file using powerShell - powershell

Question

I have a json file as given below.
{
"count": 100,
"value": [
{
"id": 264871,
"release": {
"id": 36803,
"name": "Test_1020_SP_1",
"url": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/releases/36803",
"artifacts": [
{
"sourceId": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1/efa62ff5-7dc3-4b5a-b7e1-29a319550b28:12e54cbd-881f-43de-8442-4454ffba61fb",
"type": "PackageManagement",
"alias": "_Project.scripts.release",
"definitionReference": {
"definition": {
"id": "12e54cbd-881f-43de-8442-4454ffba61fb",
"name": "Project.scripts.release"
},
"feed": {
"id": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1/efa62ff5-7dc3-4b5a-b7e1-29a319550b28",
"name": "Project_release_scripts"
},
"files": {
"id": "**",
"name": "**"
},
"packageType": {
"id": "nuget",
"name": "NuGet"
},
"skipextract": {
"id": "",
"name": ""
},
"version": {
"id": "2022.10.11.1",
"name": "2022.10.11.1"
},
"view": {
"id": "",
"name": ""
}
},
"isPrimary": true,
"isRetained": false
}
],
"webAccessUri": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?releaseId=36803\u0026_a=release-summary",
"_links": {
"self": {
"href": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/releases/36803"
},
"web": {
"href": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?releaseId=36803\u0026_a=release-summary"
}
}
},
"releaseDefinition": {
"id": 6777,
"name": "Test_Deploy",
"path": "\\Test",
"projectReference": {
"id": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1",
"name": null
},
"url": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/definitions/6777",
"_links": {
"self": {
"href": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/definitions/6777"
},
"web": {
"href": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?definitionId=6777"
}
}
}
},
{
"id": 264870,
"release": {
"id": 36800,
"name": "Test_2698_SP_1",
"url": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/releases/36800",
"artifacts": [
{
"sourceId": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1/efa62ff5-7dc3-4b5a-b7e1-29a319550b28:12e54cbd-881f-43de-8442-4454ffba61fb",
"type": "PackageManagement",
"alias": "_Project.scripts.release",
"definitionReference": {
"definition": {
"id": "12e54cbd-881f-43de-8442-4454ffba61fb",
"name": "Project.scripts.release"
},
"feed": {
"id": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1/efa62ff5-7dc3-4b5a-b7e1-29a319550b28",
"name": "Project_release_scripts"
},
"files": {
"id": "**",
"name": "**"
},
"packageType": {
"id": "nuget",
"name": "NuGet"
},
"skipextract": {
"id": "",
"name": ""
},
"version": {
"id": "2022.10.11.1",
"name": "2022.10.11.1"
},
"view": {
"id": "",
"name": ""
}
},
"isPrimary": true,
"isRetained": false
}
],
"webAccessUri": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?releaseId=36800\u0026_a=release-summary",
"_links": {
"self": {
"href": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/releases/36800"
},
"web": {
"href": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?releaseId=36800\u0026_a=release-summary"
}
}
},
"releaseDefinition": {
"id": 6777,
"name": "Test_Deploy",
"path": "\\Test",
"projectReference": {
"id": "6d203219-63b3-4b1c-b4fe-fa9172d74fb1",
"name": null
},
"url": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/definitions/6777",
"_links": {
"self": {
"href": "https://vsrm.dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_apis/Release/definitions/6777"
},
"web": {
"href": "https://dev.azure.com/TestProject/6d203219-63b3-4b1c-b4fe-fa9172d74fb1/_release?definitionId=6777"
}
}
}
}
]
}
I wan to convert the above json file to csv format with heading as given below
I tried using the below command
(Get-Content -Path "C:\Test.json") | ConvertFrom-Json | Select-Object -expand value | ConvertFrom-Csv |Out-File C:\Test.csv.
But the value is not coming in the expected format and it is coming without the column names

Answer 1

This should work, though it will generate a column per property (including inner arrays).
I would not expect this to work if the json had nested arrays.
# function to flatten a PSCustomObject into a hashtable of primitives
# this can probably be cleaned up
function flatten($customObj) {
$flatHashtable = #{}
foreach ($entry in #($customObj.PSObject.Properties)) {
$value = $entry.Value
if ($value -is [Array]) {
$valueArray = $value
$size = $value.Count
$keyTemplate = '/{0}/'
} else {
$valueArray = #($value)
$size = 1
$keyTemplate = '/'
}
for ($i = 0; $i -lt $size; $i++) {
$item = $valueArray[$i]
$keySeparator = $keyTemplate -f $i
if ($item -is [PSObject]) {
$subentries = flatten $item # recursive
foreach ($subentry in $subentries.GetEnumerator()) {
$flattenedKey = $entry.Name + $keySeparator + $subentry.Key
if (!($flatHashtable.ContainsKey($flattenedKey))) {
$flatHashtable.Add($flattenedKey, $subentry.Value)
}
}
} else {
if (!($flatHashtable.ContainsKey($entry.Name))) {
$flatHashtable.Add($entry.Name, $item)
}
}
}
}
return $flatHashtable
}
$jsonText = '<your json here>'
$jsonObj = $jsonText | ConvertFrom-Json
# ignore "count" property
$releases = $jsonObj.value
$rows = #()
$releases | ForEach-Object { $rows += (flatten $_) }
$csvColumns = $rows.Keys | Group-Object | Select-Object -ExpandProperty Name | Sort-Object
$rows | Select-Object -Property $csvColumns | ConvertTo-Csv | Set-Content '<path to csv file>'