英文:
ConvertTo-Json ignores array in the inner object
问题
我有一个需要扩展的对象。问题是在转换为JSON后，内部数组对象总是空的。我不明白哪里出错了 :(
```powershell
$settings = @{}
# 创建嵌套对象
$settings | Add-Member -Type NoteProperty -Name nested_obj -Value @{}
# 使用数组属性扩展嵌套对象
$settings.nested_obj | Add-Member -Type NoteProperty -Name nested_property -Value @("1", "2")
# {"nested_property":["1","2"]}
Write-Host ($settings.nested_obj | ConvertTo-Json -Compress -Depth 100)
# {"nested_obj":{}} - 嵌套对象意外地为空
Write-Host ($settings | ConvertTo-Json -Compress -Depth 100)
谢谢
<details>
<summary>英文:</summary>
I have an object I need to extend. The issue is after converting to JSON the inner array object is always empty. I don't understand where's my fail :(
```powershell
$settings = @{}
# create the nested object
$settings | Add-Member -Type NoteProperty -Name nested_obj -Value @{}
# extend the nested object with an array property
$settings.nested_obj | Add-Member -Type NoteProperty -Name nested_property -Value @( "1", "2" )
# {"nested_property":["1","2"]}
Write-Host ( $settings.nested_obj | ConvertTo-Json -Compress -Depth 100 )
# {"nested_obj":{}} - the nested object is unexpectedly empty
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
Thanks
答案1
得分: 3
ConvertTo-Json 看到 $settings 中存储的对象是一个 hashtable，所以它开始序列化字典条目，而不是序列化属性 - 而在其中你没有任何字典条目。
要么将 nested_obj 和 nested_property 值附加为字典条目：
# 创建根哈希表/字典
$settings = @{}
# 创建嵌套哈希表
$settings['nested_obj'] = @{}
# 向嵌套哈希表添加条目
$settings['nested_obj']['nested_property'] = @( "1", "2" )
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
... 或者，使用实际的（非字典）对象：
# 创建对象层次结构
$settings = [PSCustomObject]@{
nested_obj = [PSCustomObject]@{
nested_property = @( "1", "2" )
}
}
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
PowerShell 2.0 版本中，使用 Add-Member，与您的初始尝试相似，不同之处在于我们用 New-Object psobject 替换了 @{}：
$settings = New-Object psobject
$settings | Add-Member -Type NoteProperty -Name nested_obj -Value (New-Object psobject)
$settings.nested_obj | Add-Member -Type NoteProperty -Name nested_property -Value @( "1", "2" )
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
英文:
ConvertTo-Json sees the object stored in $settings is a hashtable, and so rather than serializing properties, it starts serializing dictionary entries - of which you have none.
Either attach the nested_obj and nested_property values as dictionary entries:
# create root hashtable/dictionary
$settings = @{}
# create the nested hashtable
$settings['nested_obj'] = @{}
# add an entry to the nested hashtable
$settings['nested_obj']['nested_property'] = @( "1", "2" )
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
... or, use actual (non-dictionary) objects
# create object hierarchy
$settings = [PSCustomObject]@{
nested_obj = [PSCustomObject]@{
nested_property = @( "1", "2" )
}
}
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
The PowerShell 2.0-equivalent, using Add-Member, would be fairly similar to your initial attempt, with the difference that we replace @{} with New-Object psobject:
$settings = New-Object psobject
$settings | Add-Member -Type NoteProperty -Name nested_obj -Value (New-Object psobject)
$settings.nested_obj | Add-Member -Type NoteProperty -Name nested_property -Value @( "1", "2" )
# {"nested_obj":{"nested_property":["1","2"]}}
Write-Host ( $settings | ConvertTo-Json -Compress -Depth 100 )
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