class ActiveRecord::Validations::UniquenessValidator
Public Class Methods
new(options)
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Calls superclass method
# File lib/active_record/validations/uniqueness.rb, line 6 def initialize(options) super(options.reverse_merge(:case_sensitive => true)) end
Public Instance Methods
setup(klass)
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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
validate_each(record, attribute, value)
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# 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.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.read_attribute(scope_item) relation = relation.and(table[scope_item].eq(scope_value)) end if finder_class.unscoped.where(relation).exists? record.errors.add(attribute, :taken, options.except(:case_sensitive, :scope).merge(:value => value)) end end