method
validate_each
v6.1.7.7 -
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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 19 def validate_each(record, attribute, value) finder_class = find_finder_class_for(record) value = map_enum_attribute(finder_class, attribute, value) relation = build_relation(finder_class, attribute, value) if record.persisted? if finder_class.primary_key relation = relation.where.not(finder_class.primary_key => record.id_in_database) else raise UnknownPrimaryKey.new(finder_class, "Cannot validate uniqueness for persisted record without primary key.") end end relation = scope_relation(record, relation) if options[:conditions] conditions = options[:conditions] relation = if conditions.arity.zero? relation.instance_exec(&conditions) else relation.instance_exec(record, &conditions) end end if relation.exists? error_options = options.except(:case_sensitive, :scope, :conditions) error_options[:value] = value record.errors.add(attribute, :taken, **error_options) end end