Module: RedisRecord

Defined in:
lib/redis_record.rb

Constant Summary collapse

@@redis =
nil

Instance Method Summary collapse

Instance Method Details

#allObject



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# File 'lib/redis_record.rb', line 50

def all
  keys = redis.keys(redis_key("*"))
  objects = []
  keys.each do |key|
    if data = redis.get(key)
      objects << parse(data)
    end
  end
  objects
end

#find(id) ⇒ Object



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# File 'lib/redis_record.rb', line 45

def find(id)
  data = redis.get(redis_key(id))
  parse(data) if data
end

#redisObject



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# File 'lib/redis_record.rb', line 34

def redis
  @@redis
end

#redis_key(*args) ⇒ Object



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# File 'lib/redis_record.rb', line 38

def redis_key(*args)
  # redis_key -> user
  # redis_key(1) -> user_1
  # redis_key(1, "attr") -> user_1_attr
  [ @_prefix ||= self.name.downcase, *args ].join('_')
end

#use_redis(*args) ⇒ Object

call this to mixin member-methods TODO: redis parameters (host, port, etc.)



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# File 'lib/redis_record.rb', line 8

def use_redis(*args)
  class_eval do
    attr_accessor :id

    def save
      unless persisted?
        # Note: redis automatically generates an key_value-pair with type int
        self.id = self.class.redis.incr('#' + self.class.redis_key)
      end
      "OK" == self.class.redis.set(self.class.redis_key(id), self.dump)
    end

    def persisted?
      !id.nil?
    end

    protected

    def dump
      Marshal.dump(self)
    end
  end

  @@redis = Redis.new(*args)
end