Module: RedisModelExtension::SaveDestroy

Defined in:
lib/redis-model-extension/save_destroy.rb

Instance Method Summary collapse

Instance Method Details

#create_aliasesObject

create aliases (create key value [STRING] key is alias redis key and value is redis key)



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# File 'lib/redis-model-extension/save_destroy.rb', line 66

def create_aliases
  main_key = redis_key
  redis_alias_config.each do |alias_name, fields|
    RedisModelExtension::Database.redis.sadd(redis_alias_key(alias_name), main_key) if valid_alias_key? alias_name
  end
end

#destroy!Object Also known as: destroy

remove record form database



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# File 'lib/redis-model-extension/save_destroy.rb', line 84

def destroy!
  if exists?
    run_callbacks :destroy do
      #destroy main object
      RedisModelExtension::Database.redis.del(redis_key) 
      destroy_aliases!
    end
  end
end

#destroy_aliases!Object

remove all aliases



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# File 'lib/redis-model-extension/save_destroy.rb', line 97

def destroy_aliases!
  #do it only if it is existing object!
  if redis_old_keys[:aliases].size > 0
    redis_old_keys[:aliases].each do |alias_key|
      RedisModelExtension::Database.redis.srem alias_key, redis_old_keys[:key]
      #delete alias with 0 keys
      RedisModelExtension::Database.redis.del(alias_key) if RedisModelExtension::Database.redis.scard(alias_key).to_i == 0
    end
  end
end

#saveObject

save method - save all attributes (fields) and create aliases



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# File 'lib/redis-model-extension/save_destroy.rb', line 18

def save
  perform = lambda do
    # can be saved into redis?
    if valid?

      #autoicrement id
      self.send("id=", increment_id) if redis_key_config.include?(:id) && !self.id?

      #generate key (possibly new)
      generated_key = redis_key        

      #take care about renaming saved hash in redis (if key changed)
      if redis_old_keys[:key] && redis_old_keys[:key] !=  generated_key && RedisModelExtension::Database.redis.exists(redis_old_keys[:key])
        RedisModelExtension::Database.redis.rename(redis_old_keys[:key], generated_key)
      end

      #ignore nil values for save 
      args = self.class.redis_save_fields_with_nil_conf ? to_arg : to_arg.reject{|k,v| v.nil?}

      #perform save to redis hash
      RedisModelExtension::Database.redis.hmset(generated_key, *args.inject([]){ |arr,kv| arr + [kv[0], value_to_redis(kv[0], kv[1])]})
      
      # destroy aliases
      destroy_aliases!
      create_aliases

      #after save make sure instance remember old key to know if it needs to be ranamed
      store_keys
    end
  end

  run_callbacks :save do
    unless exists?
      run_callbacks :create do
        perform.()
      end
    else
      perform.()
    end
  end
  unless errors.any?
    return self
  else
    return false
  end
end

#update(args) ⇒ Object

update multiple attrubutes at once



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# File 'lib/redis-model-extension/save_destroy.rb', line 74

def update args
  args.each do |key, value|
    method = "#{key}=".to_sym 
    if self.respond_to? method
      self.send(method, value)
    end
  end
end