Class: Neography::Relationship

Inherits:
PropertyContainer show all
Extended by:
Index
Includes:
Equal, Property
Defined in:
lib/neography/relationship.rb

Instance Attribute Summary collapse

Attributes inherited from PropertyContainer

#neo_id

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Index

find, index

Methods included from Property

#[], #[]=, method_missing, #new_ostruct_member

Methods included from Equal

#==, #eql?, #equal?

Constructor Details

#initialize(hash = nil, server = nil) ⇒ Relationship

Returns a new instance of Relationship.



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# File 'lib/neography/relationship.rb', line 35

def initialize(hash=nil, server=nil)
  super(hash)
  @start_node = hash["start"].split('/').last
  @end_node = hash["end"].split('/').last
  @rel_type = hash["type"]
  neo_server = server
end

Instance Attribute Details

#end_node ⇒ Object

Returns the value of attribute end_node.



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# File 'lib/neography/relationship.rb', line 7

def end_node
  @end_node
end

#rel_type ⇒ Object

Returns the value of attribute rel_type.



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# File 'lib/neography/relationship.rb', line 7

def rel_type
  @rel_type
end

#start_node ⇒ Object

Returns the value of attribute start_node.



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# File 'lib/neography/relationship.rb', line 7

def start_node
  @start_node
end

Class Method Details

.create(type, from_node, to_node, props = nil) ⇒ Object 



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# File 'lib/neography/relationship.rb', line 11

def create(type, from_node, to_node, props=nil)
  rel = Neography::Relationship.new(from_node.neo_server.create_relationship(type, from_node, to_node, props))
  rel.start_node = from_node
  rel.end_node = to_node
  rel.rel_type = type
  rel
end

.load(*args) ⇒ Object 



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# File 'lib/neography/relationship.rb', line 19

def load(*args)
  # the first argument can be an hash of properties to set
  rel = !args[0].is_a?(Neography::Rest) && args[0] || args[1]

  # a db instance can be given, it is the first argument or the second
  db = (args[0].is_a?(Neography::Rest) && args[0]) || args[1] || Neography::Rest.new
  rel = db.get_relationship(rel)
  unless rel.nil?
    rel = Neography::Relationship.new(rel) 
    rel.start_node = Neography::Node.load(rel.start_node, db) 
    rel.end_node = Neography::Node.load(rel.end_node, db) 
  end
  rel
end

Instance Method Details

#del ⇒ Object 



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# File 'lib/neography/relationship.rb', line 51

def del
  self.start_node.neo_server.delete_relationship(self.neo_id)
end

#exist? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/neography/relationship.rb', line 55

def exist?
  !self.start_node.neo_server.get_relationship(self.neo_id).nil?
end

#neo_server ⇒ Object 



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# File 'lib/neography/relationship.rb', line 43

def neo_server
  @neo_server ||= self.start_node.neo_server
end

#neo_server=(server) ⇒ Object 



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# File 'lib/neography/relationship.rb', line 47

def neo_server=(server)
  @neo_server = server
end

#other_node(node) ⇒ Object 



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# File 'lib/neography/relationship.rb', line 59

def other_node(node)
  if node == @start_node
    @end_node
  else
    @start_node
  end
end