Redmine

Sorry about the simplistic question, but I'm new to ruby on rails.

I installed the acts_as_taggable_on plugin and setup a plugin to use it to add some variables to issues.

I was able to add the fields to the form and make issue taggable on multiple contexts, but the tag fields just would NOT save. Manually calling the tag save event with some data would work.

Finally, I have up on the plugin and edited the issue model and controller itself and had the same issue, until I added platform_list[I had used platforms as my tag constext, so platform_list is the SAFE_ATTRIBUTES constant:
SAFE_ATTRIBUTES = %w(
tracker_id
status_id
parent_issue_id
category_id
assigned_to_id
priority_id
fixed_version_id
subject
description
start_date
due_date
done_ratio
estimated_hours
custom_field_values
) unless const_defined?(:SAFE_ATTRIBUTES)

From what I can see here, what is happening is that redmine is removing all the issue fields sent in the put request which are not in this array. So my attempt and adding tags kept getting deleted on submit.

So my question is how would I modify this constant from within my own plugin? I don't want to redeclare it entirely, I just want to append to it my own variables so they don't get scrubbed.