Class: Architect4r::Model::Relationship

Inherits:
Object
  • Object
show all
Extended by:
Adapters::CarrierWave
Includes:
Callbacks, Connection, Persistency
Defined in:
lib/architect4r/model/relationship.rb,
lib/architect4r/adapters/carrier_wave.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Adapters::CarrierWave

mount_uploader

Methods included from Persistency

#create!, #destroyed?, #id, #new?, #persisted?, #save, #save!, #update_attributes

Methods included from Connection

#connection

Constructor Details

#initialize(*args) ⇒ Relationship

Instance methods



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# File 'lib/architect4r/model/relationship.rb', line 36

def initialize(*args)
  # Detect source and destination
  if s = args[0].is_a?(Architect4r::Model::Node) && args.shift
    self.source = s
    
    if d = args[0].is_a?(Architect4r::Model::Node) && args.shift
      self.destination = d
    end
  end
  
  # Detect properties
  properties = args[0].is_a?(Hash) && args.shift
  properties ||= {}
  parse_properties(properties)
end

Instance Attribute Details

#destination ⇒ Object

Virtual attributes



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# File 'lib/architect4r/model/relationship.rb', line 30

def destination
  @destination
end

#raw_data ⇒ Object

Virtual attributes



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# File 'lib/architect4r/model/relationship.rb', line 30

def raw_data
  @raw_data
end

#source ⇒ Object

Virtual attributes



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# File 'lib/architect4r/model/relationship.rb', line 30

def source
  @source
end

Class Method Details

.find(id) ⇒ Object 



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# File 'lib/architect4r/model/relationship.rb', line 132

def self.find(id)
  data = connection.execute_cypher("start r=relationship(#{id}) return r")
  data &&= data['data'] && data['data'].flatten.first
  self.build_from_database(data)
end

.find!(id) ⇒ Object 



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# File 'lib/architect4r/model/relationship.rb', line 138

def self.find!(id)
  self.find(id) || raise(Architect4r::RecordNotFound.new("Could not find the #{self.name} with id #{id}!"))
end

.inherited(subklass) ⇒ Object 



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# File 'lib/architect4r/model/relationship.rb', line 13

def self.inherited(subklass)
  super
  subklass.send(:include, ActiveModel::Conversion)
  subklass.extend ActiveModel::Naming
  subklass.send(:include, Architect4r::Model::Properties)
  subklass.send(:include, Architect4r::Model::Validations)
  
  subklass.class_exec do
    # Validations
    validates :source, :presence => true
    validates :destination, :presence => true
  end
end

Instance Method Details

#create(options = {}) ⇒ Object

Create the document. Validation is enabled by default and will return false if the document is not valid. If all goes well, the document will be returned.



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# File 'lib/architect4r/model/relationship.rb', line 55

def create(options = {})
  run_callbacks :create do
    run_callbacks :save do
      # only create valid records
      return false unless perform_validations(options)
      
      # perform creation
      if result = connection.create_relationship(self.source.id, self.destination.id, self.class.name, self._to_database_hash)
        self.raw_data = result
      end
      
      # if something goes wrong we receive a nil value and return false
      !result.nil?
    end
  end
end

#destroy ⇒ Object 



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# File 'lib/architect4r/model/relationship.rb', line 93

def destroy
  run_callbacks :destroy do
    if result = connection.delete_relationship(self.id)
      @_destroyed = true
      self.freeze
    end
    result
  end
end

#update(options = {}) ⇒ Object

Trigger the callbacks (before, after, around) only if the document isn’t new



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# File 'lib/architect4r/model/relationship.rb', line 74

def update(options = {})
  run_callbacks :update do
    run_callbacks :save do
      # Check if record can be updated
      raise "Cannot save a destroyed document!" if destroyed?
      raise "Calling #{self.class.name}#update on document that has not been created!" if new?
      
      # Check if we can continue
      return false unless perform_validations(options)
      
      # perform update
      result = connection.update_relationship(self.id, self._to_database_hash)
      
      # if something goes wrong we receive a nil value and return false
      !result.nil?
    end
  end
end