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# File 'lib/composite_primary_keys/reflection.rb', line 4
def primary_key_name
return @primary_key_name if @primary_key_name
case
when macro == :belongs_to
@primary_key_name = options[:foreign_key] || class_name.foreign_key
when options[:as]
@primary_key_name = options[:foreign_key] || "#{options[:as]}_id"
else
@primary_key_name = options[:foreign_key] || active_record.name.foreign_key
end
@primary_key_name = @primary_key_name.to_composite_keys.to_s if @primary_key_name.is_a? Array
@primary_key_name
end
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