Document Add/Set/Delete values deep in the YAML?

[5chrisalexander]

a:
  b:
    c:
      key1: value1

If I have a Document (doc) that represents the above YAML, I want to be able to add a key/value pair next to key1, like this:

a:
  b:
    c:
      key1: value1
      key2: value2

To do this, I'd think I could do
doc.add({key:'a.b.c.key2', value:'value2'}) or doc.set('a.b.c.key2','value2')
However, when I do that I get a Document that toString()s like this:

a:
  b:
    c:
      key1: value1
a.b.c.key2: value2

Is there a way to do deep adds/sets/deletes?

Thanks!

[5chrisalexander]

Here's the part where I sort of answer my own question after doing some more playing around:
doc.setIn(['a','b','c','key2'],'value2')
gives me

a:
  b:
    c:
      key1: value1
      key2: value2

However, if I wanted to set 'a.d.e.key3' like:

a:
  b:
    c:
      key1: value1
      key2: value2
  d:
    e:
      key3: value3

This comes out looking like:

a:
  b:
    c:
      key1: value1
      key2: value2
  !!omap
  - d:
      !!omap
      - e:
          !!omap
          - key3: value3

[eemeli]

This should work, at least with yaml@next?

# src
a:
  b:
    c:
      key1: value1

import { parseDocument } from 'yaml'

const doc = parseDocument(src)
doc.setIn(['a','b','c','key2'], 'value2')
doc.setIn(['a','d','e','key3'], 'value3')

# doc.toString()
a:
  b:
    c:
      key1: value1
      key2: value2
  d:
    e:
      key3: value3

[5chrisalexander]

Aha! Yep, I was using v1.1. That seems to do the trick, thanks!