Module: Seabright::Indices::ClassMethods

Defined in:
lib/redis_object/indices.rb

Instance Method Summary collapse

Instance Method Details

#has_index?(k) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis_object/indices.rb', line 134

def has_index?(k)
  k and indices.include?(k.to_sym)
end

#has_sort_index?(k) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis_object/indices.rb', line 138

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

#index(k) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 107

def index(k)
  indices << k.to_sym
  intercept_sets_for_indices!
end

#index_key(k, v) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 91

def index_key(k,v)
  "#{self.plname}::field_index::#{k}::#{v}"
end

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



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

def indexed(idx,num=-1,reverse=false)
  kys = store.send(reverse ? :zrevrange : :zrange, sort_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

#indices ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 99

def indices
  @@indices ||= Set.new
end

#intercept_sets_for_indices! ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 21

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_index?(k)
        set_index k, v, hkey
      end
      if self.class.has_sort_index?(k)
        set_sort_index k, v, hkey
      end
      ret
    end
    
    def set_index(k,v,hkey)
      if cur = get(k)
        store.srem(self.class.index_key(k,cur), hkey)
      end
      store.sadd(self.class.index_key(k,v), hkey)
    end
    
    def set_sort_index(k,v,hkey)
      store.zrem(self.class.sort_index_key(k), hkey)
      store.zadd(self.class.sort_index_key(k), score_format(k,v), hkey)
    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)
      dat.select {|k,v| self.class.has_index?(k) }.each do |k,v|
        set_index k, v, hkey
      end
      dat.select {|k,v| self.class.has_sort_index?(k) }.each do |k,v|
        set_sort_index k, v, hkey
      end
      unindexed_mset(dat)
    end
    
  end
  @intercepted_sets_for_indices = true
end

#latest ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 142

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

#reindex(k) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 117

def reindex(k)
  store.keys(index_key(k,"*")).each do |ik|
    store.del ik
  end
  all.each do |obj|
    if v = obj.get(k)
      obj.set_index(k, v, obj.hkey)
    end
  end
end

#reindex_all_indices! ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 128

def reindex_all_indices!
  indices.each do |k|
    reindex(k)
  end
end

#sort_by(k) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 112

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

#sort_index_key(idx) ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 95

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

#sort_indices ⇒ Object 



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# File 'lib/redis_object/indices.rb', line 103

def sort_indices
  @@sort_indices ||= Set.new
end