ActiveModel::EachValidator
Unfortunately, we have to tie Uniqueness validators to a class.
# File lib/active_record/validations/uniqueness.rb, line 11 def setup(klass) @klass = klass end
# File lib/active_record/validations/uniqueness.rb, line 15 def validate_each(record, attribute, value) finder_class = find_finder_class_for(record) table = finder_class.unscoped table_name = record.class.quoted_table_name if value && record.class.serialized_attributes.key?(attribute.to_s) value = YAML.dump value end sql, params = mount_sql_and_params(finder_class, table_name, attribute, value) relation = table.where(sql, *params) Array.wrap(options[:scope]).each do |scope_item| scope_value = record.send(scope_item) relation = relation.where(scope_item => scope_value) end unless record.new_record? # TODO : This should be in Arel relation = relation.where("#{record.class.quoted_table_name}.#{record.class.primary_key} <> ?", record.send(:id)) end if relation.exists? record.errors.add(attribute, :taken, options.except(:case_sensitive, :scope).merge(:value => value)) end end
Generated with the Darkfish Rdoc Generator 2.