ActsAsParanoid::Validations::UniquenessWithoutDeletedValidator

# File lib/acts_as_paranoid/validations.rb, line 10
def validate_each(record, attribute, value)
  finder_class = find_finder_class_for(record)
  table = finder_class.arel_table

  coder = record.class.serialized_attributes[attribute.to_s]

  if value && coder
    value = coder.dump value
  end

  relation = build_relation(finder_class, table, attribute, value)
  relation = relation.and(table[finder_class.primary_key.to_sym].not_eq(record.send(:id))) if record.persisted?

  Array.wrap(options[:scope]).each do |scope_item|
    scope_value = record.send(scope_item)
    relation = relation.and(table[scope_item].eq(scope_value))
  end

  # Re-add ActsAsParanoid default scope conditions manually.
  if finder_class.unscoped.where(finder_class.paranoid_default_scope_sql).where(relation).exists?
    record.errors.add(attribute, :taken, options.except(:case_sensitive, :scope).merge(:value => value))
  end
end