Adding Attribute to XML

[rseeton]

Hello all,

I'm attempting to use Dasel to modify an existing XML file.

Adding or Updating elements works fine.
Updating an existing attribute works fine.

However, I'm stuck with the creation of new attribute:

Sample File: dasel_test.xml

<greddle>
  <bar>
    <baz/>
    <fizz id=""/>
  </bar>
</greddle>

I can update the greddle.bar.fizz element with:

~/bin/dasel_linux_386 put -f dasel_test.xml -r xml --pretty=true -v 'test_ood' 'greddle.bar.fizz.-id'

However, attempts to add the attribute 'id' to the baz element fails:

 ~/bin/dasel_linux_386 put -f dasel_test.xml -r xml --pretty=true -v 'test_ood' 'greddle.bar.baz.-id'
Error: cannot use property selector on non map/struct types: string: property not found: -id

~/bin/dasel_linux_386 put -f dasel_test.xml -r xml --pretty=true -v 'test_ood' 'greddle.bar.baz.-id.append()'
Error: cannot use property selector on non map/struct types: string: property not found: -id

~/bin/dasel_linux_386 put -f dasel_test.xml -r xml --pretty=true -v 'test_ood' 'greddle.bar.baz.-id.[]'
Error: cannot use property selector on non map/struct types: string: property not found: -id

Is this possible within Dasel - if so, can someone point me to what I'm missing?