Module: Seabright::Indices::ClassMethods

Defined in:
lib/redis_object/indices.rb

Instance Method Summary collapse

Instance Method Details

#has_sort_index?(k) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis_object/indices.rb', line 85

def has_sort_index?(k)
  k and sort_indices.include?(k.to_sym)
end

#index_key(idx) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 65

def index_key(idx)
  "#{self.plname}::#{idx}"
end

#indexed(idx, num = -1,, reverse = false) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 47

def indexed(idx,num=-1,reverse=false)
  kys = store.send(reverse ? :zrevrange : :zrange, index_key(idx), 0, num-1)
  out = ListEnumerator.new(kys) do |yielder|
    kys.each do |member|
      if a = self.find_by_key(member)
        yielder << a
      end
    end
  end
  if block_given?
    out.each do |itm|
      yield itm
    end
  else
    out
  end
end

#intercept_sets_for_indices! ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 10

def intercept_sets_for_indices!
  return if @intercepted_sets_for_indices
  self.class_eval do
    
    def indexed_set_method(meth,k,v)
      ret = send("unindexed_#{meth}".to_sym,k,v)
      if self.class.has_sort_index?(k)
        store.zrem(index_key(k), hkey)
        store.zadd(index_key(k), score_format(k,v), hkey)
      end
      ret
    end
    
    alias_method :unindexed_set, :set unless method_defined?(:unindexed_set)
    def set(k,v)
      indexed_set_method(:set,k,v)
    end
    
    alias_method :unindexed_setnx, :setnx unless method_defined?(:unindexed_setnx)
    def setnx(k,v)
      indexed_set_method(:setnx,k,v)
    end
    
    alias_method :unindexed_mset, :mset unless method_defined?(:unindexed_mset)
    def mset(dat)
      ret = unindexed_mset(dat)
      dat.select {|k,v| self.class.has_sort_index?(k) }.each do |k,v|
        store.zrem(index_key(k), hkey)
        store.zadd(index_key(k), score_format(k,v), hkey)
      end
      ret
    end
    
  end
  @intercepted_sets_for_indices = true
end

#latest ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 89

def latest
  indexed(:created_at,999,true).first
end

#reindex(k) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 78

def reindex(k)
  store.del index_key(k)
  all.each do |obj|
    obj.set(k,obj.get(k))
  end
end

#sort_by(k) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 73

def sort_by(k)
  sort_indices << k.to_sym
  intercept_sets_for_indices!
end

#sort_indices ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 69

def sort_indices
  @@sort_indices ||= []
end