Nested json extract from powershell - json

Question

I need to show id_products as a result, the remaining data I have a photo id and url pictures.
Below is the code which I extract data from
$files_ro = "products.csv"
$Ident = Import-Csv -Path $files_ro -Header id_product | select-object -skip 1
foreach ($idka in $ident)
{
$idp = $idka.id_product
$request_n = "http://api.url/"+ $idp +""
foreach($d1 in $request_n)
{
Invoke-WebRequest $d1 |
ConvertFrom-Json |
Select-Object -Expand data |
Select -expand extended_info |
select -expand images |
Select id,url
}
}
files
- product.csv
"id_product"
"21221"
"23526"
"23525"
"24074"
"21302"
"24372"
"21272"
"21783"
"27268"
"21776"
json
{
data: {
id: 21221,
extended_info: {
images: [
{
id: 34380,
url: photos1.jpg
},
{
id: 34381,
url: photos2.jpg
},
{
id: 34382,
url: photos3.jpg
}
],
}
}
}
I would like it to look like this:
id_product,id(images), url
21221,34380,photos1.jpg
21221,34381,photos2.jpg
21221,34382,photos3.jpg
You can help me somehow ?

Answer 1

Your provided JSON is not valid. However, I would use a PSCustomObject to create the desired result:
$json = #'
{
"data": {
"id": 21221,
"extended_info": {
"images": [{
"id": 34380,
"url": "photos1.jpg"
}, {
"id": 34381,
"url": "photos2.jpg"
}, {
"id": 34382,
"url": "photos3.jpg"
}
]
}
}
}
'# | ConvertFrom-Json
$json.data.extended_info.images | ForEach-Object {
[PSCustomObject]#{
id_product = $json.data.id
"id(images)" = $_.id
url = $_.url
}
}
Output:
id_product id(images) url
---------- ---------- ---
21221 34380 photos1.jpg
21221 34381 photos2.jpg
21221 34382 photos3.jpg
To convert the result to CSV, just add | ConvertTo-Csv -NoTypeInformation after the last curly bracket to get the following output:
"id_product","id(images)","url"
"21221","34380","photos1.jpg"
"21221","34381","photos2.jpg"
"21221","34382","photos3.jpg"

Answer 2

As your product.csv already has the same header it isn't necessary to supply one and then skip the first line.
Your single URL $request_n also doesn't need to be iterated with a foreach
I suggest to store the result from the webrequest and convertedfrom-json into var $Json and proceed with Martin Brandls good answer.
## Q:\Test\2019\05\24\SO_56287843.ps1
$files_ro = "products.csv"
$Ident = Import-Csv -Path $files_ro
$Data = foreach ($idka in $ident){
$request_n = "http://api.url/{0}" -f $idka.id_product
$Json = Invoke-WebRequest $request_n | ConvertFrom-Json
# inserted code from Martin Brandl's good answer
$Json.data.extended_info.images | ForEach-Object {
[PSCustomObject]#{
id_product = $json.data.id
"id(images)" = $_.id
url = $_.url
}
}
}
$Data
$Data | Export-Csv ProductImages.csv -NoTypeInformation
#$Data | Out-Gridview