Acts as nested - Enforcing a Max Level

Hello, I’m currently using the gem ‘nested_set’ for comment threading.

What I want to do is prevent the comment level from going more than 2
levels
deep. What I tired doing was something like this:

class Comment < ActiveRecord::Base
    ....
    before_save :ensure_max_nestedset_level
  private

    # We don't want comments to go more than 2 levels deep. That's

overkill
def ensure_max_nestedset_level
if self.level > 2
self.level = 2
end
end

end

But it looks like you cant set a level only obtain an objects level.
With
the goal being to enforce a MAX of 2 levels deep for comment threading.
Can
anyone suggest a way to enforce that from happening?

The use case being:

Comment Main (level 0)

  Comment Reply (level 1)

    Comment Reply about XXXX (level 2)

When a user replies to the last one (about XXXX) I don’t want the
comment to
be set to a level of 3, I want to cap that at 2.

Ideas? Thanks

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