Module: ActiveRecord::Delegation

Included in:
Relation
Defined in:
activerecord/lib/active_record/relation/delegation.rb

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 (protected) 



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# File 'activerecord/lib/active_record/relation/delegation.rb', line 34

def method_missing(method, *args, &block)
  if @klass.respond_to?(method)
    ::ActiveRecord::Delegation.delegate_to_scoped_klass(method)
    scoping { @klass.send(method, *args, &block) }
  elsif Array.method_defined?(method)
    ::ActiveRecord::Delegation.delegate method, :to => :to_a
    to_a.send(method, *args, &block)
  elsif arel.respond_to?(method)
    ::ActiveRecord::Delegation.delegate method, :to => :arel
    arel.send(method, *args, &block)
  else
    super
  end
end

Class Method Details

.delegate_to_scoped_klass(method) ⇒ Object 



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# File 'activerecord/lib/active_record/relation/delegation.rb', line 10

def self.delegate_to_scoped_klass(method)
  if method.to_s =~ /\A[a-zA-Z_]\w*[!?]?\z/
    module_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{method}(*args, &block)
        scoping { @klass.#{method}(*args, &block) }
      end
    RUBY
  else
    module_eval <<-RUBY, __FILE__, __LINE__ + 1
      def #{method}(*args, &block)
        scoping { @klass.send(#{method.inspect}, *args, &block) }
      end
    RUBY
  end
end

Instance Method Details

#respond_to?(method, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/relation/delegation.rb', line 26

def respond_to?(method, include_private = false)
  super || Array.method_defined?(method) ||
    @klass.respond_to?(method, include_private) ||
    arel.respond_to?(method, include_private)
end