Override ActiveRecord find

I have done this in Rails 2.3.10 and 3.0.3 and it works

def self.find(*args)
  records = super  
  # Manipulate Records here.
end

I am looking for a base finder function in Rails 3 which I can replace for开发者_运维知识库 this functionality to be applied to Post.all, Post.first, Post.last etc.

My advice ... make a scope or a class method to do this instead:

e.g.

scope :my_scope, lambda {|...| ...}

then to apply

TheClass.my_scope.all
TheClass.my_scope.first
TheClass.my_scope.last

all, first, and last are all just wrappers for find so redefining find should affect all of those. Take a look at how they're implemented in ActiveRecord::FinderMethods.

I believe you are looking for this:

# File activerecord/lib/active_record/relation/finder_methods.rb, line 95
def find(*args)
  return to_a.find { |*block_args| yield(*block_args) } if block_given?

  options = args.extract_options!

  if options.present?
    apply_finder_options(options).find(*args)
  else
    case args.first
    when :first, :last, :all
      send(args.first)
    else
      find_with_ids(*args)
    end
  end
end

This will do what the original question was asking.

def self.find_by_sql(*args)
  records = super

  # Manipulate Records here

  return records
end