转换为Json时忽略内部对象中的数组

发布于06月14日

我有一个对象需要扩展.问题是在转换为JSON后，内部数组对象始终为空.我不明白我的失败在哪里

$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 )

谢谢

推荐答案

ConvertTo-Json发现存储在$settings中的对象是hashtable，因此它开始序列化字典条目，而不是序列化属性--您没有任何字典条目.

将nested_obj和nested_property值作为字典条目附加:

# 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 )

...或者，使用实际的(非字典)对象

# 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 )

PowerShell2.0的类似功能使用Add-Member，与您最初的try 非常相似，不同之处在于我们将@{}替换为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 )