topic Re: Trying to figure out how to get properties of properties in Software Development Kit (SDK) and API Discussions

Trying to figure out how to get properties of properties

Tas — Wed, 04 Jun 2025 13:06:06 GMT

When I look at get-ncvol | gm, I see the primary properties, then I see what I presume are object-properties.

i.e. get-ncvol | gm I see a few Property's, but then I see Property's flagged as (DataONTAP.C.Type.Volume...)

I'd like to get the information on these, for example the volumeSisAttributes; if I run (get-ncvol).volumeSisAttributes | gm I see the list of additional SIS data I'd like to pull. But I am unsure how to do that. I don't really understand what kind of properties these sub-servient properties are, or how to get them via a PS get-ncvol structure.

Can anyone help?

TasP

Re: Trying to figure out how to get properties of properties

mbeattie — Wed, 21 Nov 2018 23:12:37 GMT

Hi Tas,

Not sure i've understood what you are trying to achiving but i hope this helps and makes sense.

#'------------------------------------------------------------------------------
Import-Module DataONTAP
Connect-NcController -Name cluster1 -HTTPS -Credential $(Get-Credential)
$volume = Get-NcVol -Name volume1 -Vserver vserver1
#'------------------------------------------------------------------------------
<#
If you invoke "$volume | fl" and pipe it to format-list you will see the volumes properties and sub object types. 
EG: DataONTAP.C.Types.Volume.VolumeSisAttributes
If you invoke the sub object type and pipe it to format-list you can enumerate the property names of the sub object.
EG: "$volume.VolumeSisAttributes | fl"
You can then access the volumes sub object property values by name.
EG: "$volume.VolumeSisAttributes.IsSisVolume"
#>
#'------------------------------------------------------------------------------
$volume.VolumeSisAttributes.IsSisVolume
True
#'------------------------------------------------------------------------------

/Matt

Re: Trying to figure out how to get properties of properties

Tas — Mon, 26 Nov 2018 19:49:57 GMT

Matt:

Thanks. I was trying to figure out the 'sub-object' (sub-properties?). I still don't understand what a sub-object is. What I was trying to do, is to get a listing of a certain set of volumes with the percentagetotalspacesaved for each, in a one-liner.

I think I may have to assign the volume properties to a variable and run via a foreach on each one to get the actual properties and sub-properties I need; Oh and of course I need to pass them through the 'convertto-formattednumber' scriplet.

Tas

Re: Trying to figure out how to get properties of properties

Semicolon — Tue, 27 Nov 2018 17:33:47 GMT

@Tas wrote:

if I run (get-ncvol).volumeSisAttributes | gm I see the list of additional SIS data I'd like to pull. But I am unsure how to do that.

You're looking to select custom properties. This should get you in the right direction...

Get-NcVol -Name vol1 | Select-Object -Property Name,State,TotalSize,used,Available,Dedupe,@{n="PercentSpaceSaved";e={$_.VolumeSisAttributes.PercentageTotalSpaceSaved}}

To include the ConvertTo-FormattedNumber scriplet you referenced and a pretty percent sign...

Get-NcVol -Name vol1 | Select-Object -Property Name,State,@{n="TotalSize";e={try { ConvertTo-FormattedNumber $_.TotalSize DataSize "0.0" } catch [Exception] { $null }}},@{n="Used";e={try { ConvertTo-FormattedNumber $_.Used Percent } catch [Exception] { $null }}},@{n="Available";e={try { ConvertTo-FormattedNumber $_.Available DataSize "0.0" } catch [Exception] { $null }}},@{n="PercentSpaceSaved";e={ConvertTo-FormattedNumber $_.VolumeSisAttributes.PercentageTotalSpaceSaved Percent}}

Here is a primer on using Select-Object to view custom properties

Re: Trying to figure out how to get properties of properties

Tas — Fri, 30 Nov 2018 21:08:07 GMT

Thanks @Semicolon; I will try out your suggestions. I've been deperately looking for something like this.

Tas