Module: ROM::Relation::Materializable

Included in:
ROM::Relation, Composite, Curried, Graph
Defined in:
lib/rom/relation/materializable.rb

Overview

Interface for objects that can be materialized into a loaded relation

Instance Method Summary collapse

Instance Method Details

#each {|Hash, Object| ... } ⇒ Object

Yield relation tuples

Yields:

  • (Hash, Object) 


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# File 'lib/rom/relation/materializable.rb', line 24

def each
  return to_enum unless block_given?
  to_a.each { |tuple| yield(tuple) }
end

#first ⇒ Object

Return first tuple from a relation coerced to an array

Returns:

  • (Object) 


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# File 'lib/rom/relation/materializable.rb', line 56

def first
  to_a.first
end

#one ⇒ Object

Delegate to loaded relation and return one object

Returns:

  • (Object)

See Also:



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# File 'lib/rom/relation/materializable.rb', line 36

def one
  call.one
end

#one! ⇒ Object

Delegate to loaded relation and return one object

Returns:

  • (Object)

See Also:



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# File 'lib/rom/relation/materializable.rb', line 47

def one!
  call.one!
end

#to_a ⇒ Array Also known as: to_ary

Coerce the relation to an array

Returns:

  • (Array) 


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# File 'lib/rom/relation/materializable.rb', line 14

def to_a
  call.to_a
end