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)
  params = params.flatten
  params.each do |param|
    if self.column_names.include?(param.to_s)
      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
    else
      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
      else
        warn "PaperTrailAudit WARNING: Property \"#{param}\" does not exist on object #{self} - Audit cannot be made"
      end
    end
  end
end