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class Joiner::Path
AGGREGATE_MACROS = [:has_many, :has_and_belongs_to_many]
def initialize(base, path)
@base, @path = base, path
end
def aggregate?
macros.any? { |macro| AGGREGATE_MACROS.include? macro }
end
def macros
reflections.collect(&:macro)
end
def model
path.empty? ? base : reflections.last.try(:klass)
end
private
attr_reader :base, :path
def reflections
klass = base
path.collect { |reference|
klass.reflect_on_association(reference).tap { |reflection|
if reflection.nil?
raise Joiner::AssociationNotFound,
"No association matching #{base.name}, #{path.join(', ')}"
end
klass = reflection.klass
}
}
end
end
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