我想从puppet分配一个哈希变量到一个hiera数据结构，但我只得到一个字符串。
这是一个例子来说明我想要的。最后，我不想访问事实。
1 ---
2 filesystems:
3 - partitions: "%{::partitions}"
这是我的调试代码：
1 $filesystemsarray = lookup('filesystems',Array,'deep',[])
2 $filesystems = $filesystemsarray.map | $fs | {
3 notice("fs: ${fs['partitions']}")
4 }
5
6 notice("sda1: ${filesystemsarray[0]['partitions']['/dev/sda1']}")
map导致以下输出：
Notice: Scope(Class[Profile::App::Kms]): fs: {"/dev/mapper/localhost--vg-root"=>{"filesystem"=>"ext4", "mount"=>"/", "size"=>"19.02 GiB", "size_bytes"=>20422066176, "uuid"=>"02e2ba2c-2ee4-411d-ac63-fc963c8026b4"}, "/dev/mapper/localhost--vg-swap_1"=>{"filesystem"=>"swap", "size"=>"512.00 MiB", "size_bytes"=>536870912, "uuid"=>"95ba4b2a-7434-48fd-9331-66443c752a9e"}, "/dev/sda1"=>{"filesystem"=>"ext2", "mount"=>"/boot", "partuuid"=>"de90a5ed-01", "size"=>"487.00 MiB", "size_bytes"=>510656512, "uuid"=>"398f2ab6-a7e8-4983-bd81-db03984fbd0e"}, "/dev/sda2"=>{"size"=>"1.00 KiB", "size_bytes"=>1024}, "/dev/sda5"=>{"filesystem"=>"LVM2_member", "partuuid"=>"de90a5ed-05", "size"=>"19.52 GiB", "size_bytes"=>20961034240, "uuid"=>"wLKRQm-9bdn-mHA8-M8bE-NL76-Gmas-L7Gp0J"}}
似乎是预期的哈希，但第6行中的notice导致：
Error: Evaluation Error: A substring operation does not accept a String as a character index. Expected an Integer at ...
我的错是什么？