Contents

class Graphiti::Sideload::ManyToMany < Graphiti::Sideload
  def type
    :many_to_many
  end

  def through
    foreign_key.keys.first
  end

  def true_foreign_key
    foreign_key.values.first
  end

  def infer_foreign_key
    raise 'You must explicitly pass :foreign_key for many-to-many relaitonships, or override in subclass to return a hash.'
  end

  def assign_each(parent, children)
    children.select do |c|
      match = ->(ct) { ct.send(true_foreign_key) == parent.send(primary_key) }
      c.send(through).any?(&match)
    end
  end
end

Version data entries

2 entries across 2 versions & 2 rubygems

Version	Path
graphiti-1.0.alpha.1	lib/graphiti/sideload/many_to_many.rb
graphiti-rb-1.0.alpha.1	lib/graphiti/sideload/many_to_many.rb