Module: ActiveScaffold::ReverseAssociation::CommonMethods

Defined in:
lib/active_scaffold/extensions/reverse_associations.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/active_scaffold/extensions/reverse_associations.rb', line 4

def self.included(base)
  base.class_eval { attr_writer :reverse }
  base.alias_method_chain :inverse_of, :autodetect
end

Instance Method Details

#autodetect_inverse(klass = nil) ⇒ Object 



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# File 'lib/active_scaffold/extensions/reverse_associations.rb', line 25

def autodetect_inverse(klass = nil)
  return nil if klass.nil? && options[:polymorphic]
  klass ||= self.klass

  # name-based matching (association name vs self.active_record.to_s)
  matches = reverse_matches(klass)
  if matches.length > 1
    matches.find_all do |assoc|
      active_record.to_s.underscore.include? assoc.name.to_s.pluralize.singularize
    end
  end

  matches.first
end

#inverse_for?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_scaffold/extensions/reverse_associations.rb', line 13

def inverse_for?(klass)
  inverse_class = inverse_of.try(:active_record)
  inverse_class.present? && (inverse_class == klass || klass < inverse_class)
end

#inverse_of_with_autodetect ⇒ Object 



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# File 'lib/active_scaffold/extensions/reverse_associations.rb', line 9

def inverse_of_with_autodetect
  inverse_of_without_autodetect || autodetect_inverse
end

#reverse(klass = nil) ⇒ Object 



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# File 'lib/active_scaffold/extensions/reverse_associations.rb', line 18

def reverse(klass = nil)
  unless defined? @reverse # rubocop:disable Style/IfUnlessModifier
    @reverse ||= inverse_of.try(:name)
  end
  @reverse || (autodetect_inverse(klass).try(:name) unless klass.nil?)
end