method
validate_each
v3.2.1 -
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Class: ActiveRecord::Validations::UniquenessValidator
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validate_each(record, attribute, value)
public
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# File activerecord/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.send(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