discourse/app/serializers/web_hook_flag_serializer.rb

class WebHookFlagSerializer < ApplicationSerializer
  attributes :id,
             :post,
             :flag_type,
             :created_by,
             :created_at,
             :resolved_at,
             :resolved_by

  def post
    WebHookPostSerializer.new(object.post, scope: scope, root: false).as_json
  end

  def flag_type
    object.post_action_type_key
  end

  def include_post?
    object.post.present?
  end

  def created_by
    object.user && object.user.username
  end

  def resolved_at
    object.disagreed_at || object.agreed_at || object.deferred_at
  end

  def include_resolved_at?
    resolved_at.present?
  end

  def resolved_by
    User.find(disposed_by_id).username
  end

  def include_resolved_by?
    disposed_by_id.present?
  end

protected

  def disposed_by_id
    object.disagreed_by_id || object.agreed_by_id || object.deferred_by_id
  end
end