Class: Bookit::PersistableObject

Inherits:
Object
  • Object
show all
Includes:
ActiveModel::Serialization
Defined in:
lib/bookit/persistable_object.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ PersistableObject

Returns a new instance of PersistableObject.



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# File 'lib/bookit/persistable_object.rb', line 41

def initialize(params = {})
  @attributes = params
  @id = params[:id] || nil
end

Instance Attribute Details

#attributes ⇒ Object

Returns the value of attribute attributes.



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# File 'lib/bookit/persistable_object.rb', line 9

def attributes
  @attributes
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/bookit/persistable_object.rb', line 9

def id
  @id
end

Class Method Details

.find(id) ⇒ Object

specifically use the generic initializer to rebuild object



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# File 'lib/bookit/persistable_object.rb', line 22

def find(id)
  return nil unless redis.exists key(id)

  new redis.hgetall(key(id)).to_options
end

.key(id) ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 17

def key(id)
  "#{namespace}:%s" % id
end

.last ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 32

def last
  find last_id
end

.last_id ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 28

def last_id
  redis.get key("LAST_ID")
end

.namespace ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 13

def namespace
  @namespace || self
end

.redis(host = "localhost", port = 6379) ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 36

def redis(host="localhost", port=6379)
  @redis ||= Redis.new(host: host, port: port)
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 67

def clear
  redis.del key
end

#key(id = @id) ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 55

def key(id=@id)
  self.class.key(id)
end

#persist ⇒ Object

store in redis



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# File 'lib/bookit/persistable_object.rb', line 60

def persist
  @attributes[:id] = @id = incr_key

  redis.hmset key, *serializable_hash.flatten
  self
end

#read_attribute_for_validation(key) ⇒ Object Also known as: [] 



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# File 'lib/bookit/persistable_object.rb', line 50

def read_attribute_for_validation(key)
  @attributes[key]
end

#redis ⇒ Object 



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# File 'lib/bookit/persistable_object.rb', line 46

def redis
  self.class.redis
end