Class: Merb::Controller::Aggregator

Inherits:
Object
  • Object
show all
Defined in:
lib/merb_component/controller_ext.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context, controller, &block) ⇒ Aggregator

Returns a new instance of Aggregator.



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# File 'lib/merb_component/controller_ext.rb', line 103

def initialize(context, controller, &block)
  @context = context
  @controller = controller
  @agg_name = @context.controller_name.singular.intern
  model_class = Object.full_const_get(controller.name.singular)
  @object = @context.instance_variable_get("@#{@agg_name}")
  @scope = {}

  if @object
    relationship = model_class.relationships[@agg_name]
    key_names = relationship.child_key.map{|i| i.name}
    @scope = Hash[key_names.zip(@object.key)] if @object
  end

  @result = begin
    aggregators = Thread::current[:aggregators] ||= {}
    (aggregators[controller] ||= []).push(self)
    if model_class.respond_to?(:with_scope)
      model_class.send(:with_scope, @scope, &block)
    else
      block.call
    end
  ensure
    aggregators[controller].pop
  end
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/merb_component/controller_ext.rb', line 101

def context
  @context
end

#controller ⇒ Object (readonly)

Returns the value of attribute controller.



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# File 'lib/merb_component/controller_ext.rb', line 101

def controller
  @controller
end

#object ⇒ Object (readonly)

Returns the value of attribute object.



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# File 'lib/merb_component/controller_ext.rb', line 101

def object
  @object
end

#result ⇒ Object (readonly)

Returns the value of attribute result.



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# File 'lib/merb_component/controller_ext.rb', line 101

def result
  @result
end

Instance Method Details

#key ⇒ Object 



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# File 'lib/merb_component/controller_ext.rb', line 130

def key
  @object || @agg_name
end