Class: CypherBuilder::Rel

Inherits:
BasicObject
Defined in:
lib/cypher_builder/rel.rb

Instance Method Summary collapse

Constructor Details

#initialize(prefix, labels: [], from: nil, to: nil) ⇒ Rel

Returns a new instance of Rel.



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# File 'lib/cypher_builder/rel.rb', line 7

def initialize(prefix, labels: [], from: nil, to: nil)
  @prefix, @labels = prefix, ::Kernel.Array(labels)
  @from, @to = from, to
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *_) ⇒ Object 



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# File 'lib/cypher_builder/rel.rb', line 33

def method_missing(name, *_)
  Field.new(@prefix, name)
end

Instance Method Details

#as_cypher(payload:, context:) ⇒ Object 



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# File 'lib/cypher_builder/rel.rb', line 12

def as_cypher(payload:, context:)
  ::Kernel.sprintf('%s-[%s]->%s',
                   (@from ? @from.as_cypher(payload: payload, context: context.add(self)) : '()'),
                   [@prefix, *@labels].compact.join(':'),
                   (@to ? @to.as_cypher(payload: payload, context: context.add(self)) : '()'))
end

#from(node = nil) ⇒ Object 



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# File 'lib/cypher_builder/rel.rb', line 19

def from(node = nil)
  return Field.new(@prefix, 'from') if node == nil
  Rel.new(@prefix, labels: @labels, from: node, to: @to)
end

#respond_to_missing?(name, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cypher_builder/rel.rb', line 29

def respond_to_missing?(name, include_private = false)
  true
end

#to(node = nil) ⇒ Object 



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# File 'lib/cypher_builder/rel.rb', line 24

def to(node = nil)
  return Field.new(@prefix, 'to') if node == nil
  Rel.new(@prefix, labels: @labels, from: @from, to: node)
end