Module: Netzke::ActiveRecord::Basepack

Defined in:
lib/netzke/active_record/basepack.rb

Overview

Provides extensions to all ActiveRecord-based classes

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

Allow nested association access (assocs separated by “.” or “__”), e.g.: proxy_service.asset__gui_folder__name Example:

Book.first.genre__name = 'Fantasy'

is the same as:

Book.first.genre = Genre.find_by_name('Fantasy')

The result - easier forms and grids that handle nested models: simply specify column/field name as “genre__name”.



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# File 'lib/netzke/active_record/basepack.rb', line 18

def method_missing(method, *args, &block)
  # if refering to a column, just pass it to the original method_missing
  return super if self.class.column_names.include?(method.to_s)

  split = method.to_s.split(/\.|__/)
  if split.size > 1
    if split.last =~ /=$/ 
      if split.size == 2
        # search for association and assign it to self
        assoc = self.class.reflect_on_association(split.first.to_sym)
        assoc_method = split.last.chop
        if assoc
          begin
            assoc_instance = assoc.klass.send("find_by_#{assoc_method}", *args)
          rescue NoMethodError
            assoc_instance = nil
            logger.debug "!!! no find_by_#{assoc_method} method for class #{assoc.klass.name}\n"
          end
          if (assoc_instance)
            self.send("#{split.first}=", assoc_instance)
          else
            logger.debug "!!! Couldn't find association #{split.first} by #{assoc_method} '#{args.first}'"
          end
        else
          super
        end
      else
        super
      end
    else
      res = self
      split.each do |m|
        if res.respond_to?(m)
          res = res.send(m) unless res.nil?
        else
          res.nil? ? nil : super
        end
      end
      res
    end
  else
    super
  end
end

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/netzke/active_record/basepack.rb', line 4

def self.included(base)
  base.extend ClassMethods
end