Class: CatTree::Observer

Inherits:
Object
  • Object
show all
Defined in:
lib/cat_tree/observer.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Observer 



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# File 'lib/cat_tree/observer.rb', line 10

def initialize
  @ar_base = {}
end

Class Method Details

.check(&block) ⇒ Object 



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# File 'lib/cat_tree/observer.rb', line 6

def self.check(&block)
  self.new.check(&block)
end

Instance Method Details

#ar_base_count ⇒ Object 



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# File 'lib/cat_tree/observer.rb', line 22

def ar_base_count
  @ar_base.values.inject(0){|t,v| t + v[:count]}
end

#check ⇒ Object 



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# File 'lib/cat_tree/observer.rb', line 30

def check
  ActiveRecord::Base.add_cat_tree_observer(self)
  yield
ensure
  ActiveRecord::Base.remove_cat_tree_observer
  output_message
end

#notice(object) ⇒ Object 



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# File 'lib/cat_tree/observer.rb', line 14

def notice(object)
  return if object.new_record?
  key = "#{object.class.name}(id:#{object.id})"
  @ar_base[key] ||= {:count => 0, :callers => []}
  @ar_base[key][:count] += 1
  record_backtrace(@ar_base[key][:callers]) if Config.backtrace
end

#same_ar_base_objects ⇒ Object 



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# File 'lib/cat_tree/observer.rb', line 26

def same_ar_base_objects
  Hash[*(@ar_base.select{|k,v| v[:count] > 1}.flatten)]
end