Module: PaperTrailAudit::Model::ClassMethods

Defined in:
lib/paper_trail-audit.rb

Instance Method Summary collapse

Instance Method Details

#paper_trail_audit_for(*params) ⇒ Object

Defines the functions which perform the audit generation

Note: instead of looking at the type and performing a transformation we could simply reify the versions and make the function calls, however this causes a pretty significant performance hit, on an object with 100 versions the reify version was about 4x slower, although with low version counts the slowdown was much smaller, something like 1.06

Parameters:

  • *params (array of params to audit) —

    describe *params



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# File 'lib/paper_trail-audit.rb', line 53

def paper_trail_audit_for(*params)
  #return warn("PaperTrailAudit WARNING: No table exists for #{self}") if self.connection.tables.empty?
  params = params.flatten
  params.each do |param|
    reflection = self.reflect_on_all_associations(:belongs_to).select{|e| e.name == param}.first
    if(reflection)
      define_method param.to_s+"_changes" do
        self.calculate_audit_for(reflection.foreign_key).each do |o|
          o.old_value = reflection.klass.find(o.old_value) if o.old_value
          o.new_value = reflection.klass.find(o.new_value) if o.new_value
        end
      end
      next
    end

    if self.defined_enums.include?(param.to_s)
      #if it's an enum, wrap the values to the enum keys
      define_method param.to_s+"_changes" do
        self.calculate_audit_for(param).each do |o|
          o.old_value = self.defined_enums[param.to_s].key(o.old_value)
          o.new_value = self.defined_enums[param.to_s].key(o.new_value)
        end
      end
    else
      #Define a method which returns a list of audit change events
      define_method param.to_s+"_changes" do
        self.calculate_audit_for(param)
      end
    end
  end
end