我正在尝试编写一个简单的powershell脚本来获取file1.json中的键/值列表,并从file2.json更新这些键的值
我遇到的问题是那些可以嵌套的属性,我不知道键的名称。可能存在任何深度的嵌套,因此潜在地需要递归函数来迭代并搜索这些吗?
我可以遍历PSCustomObject以获得键列表,但是当它涉及到它的嵌套部分时,我很挣扎。任何帮助将是巨大的!
使用PS v5
更新:还需要添加未找到的密钥
答案 0 :(得分:1)
尝试一下(Powershell v3 +)。这个想法是先读取两个JSON文件,在内存中进行比较,然后将第二个(更新的)JSON再次导出到文件中。
# function to copy JSON properties from source to target
# obj1: source object
# obj2: target object
# (values will be copied,
# missing properties will be added,
# extra properties will be left untouched)
function Copy_Keys ($obj1, $obj2) {
# loop properties of source object
foreach ($property1 in $obj1.PSObject.Properties) {
$key = $property1.Name
$value1 = $property1.Value
$property2 = $obj2.PSObject.Properties.Item($key)
# check if property exists in target object
if ($null -ne $property2) {
$value2 = $property2.Value
# if both values are objects: compare recursively
if ($value1 -is [PSObject] -and $value2 -is [PSObject]) {
Copy_Keys $value1 $value2
}
# else simply copy the value
else {
$obj2.$key = $value1
}
}
# property does not exist: add it
else {
$obj2 | Add-Member -Type NoteProperty -Name $key -Value $value1
}
}
}
# Read JSON from source(s)
$obj1 = Get-Content "file1.json" | ConvertFrom-Json
$obj2 = Get-Content "file2.json" | ConvertFrom-Json
# Copy the properties
Copy_Keys $obj1 $obj2
# Update file2 by re-exporting the JSON
$obj2 | ConvertTo-Json | Out-File "file2.json"