acts_as_audited and “Declare either attr_protected or attr_accessible for User, but not both.”

You’re using attr_accessible on your User model, to which you also want to audit changes using acts_as_audited.  Unfortunately it blows up with “Declare either attr_protected or attr_accessible for User, but not both.”  The problem is that acts_as_audited is adding its own attr_protected.  We can patch it in acts_as_audited.rb line 71 (as of this writing).  Change:

attr_protected :audit_ids

to

attr_protected :audit_ids if accessible_attributes.nil?

P.S. I would have commented directly on the acts_as_audited site in hopes of helping more people find this, but it appears that they’ve disabled comments.  Bummer.

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