Class: Uniqueable::UniqueableValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
lib/uniqueable/validates_uniqueable.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ UniqueableValidator

Returns a new instance of UniqueableValidator.



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# File 'lib/uniqueable/validates_uniqueable.rb', line 3

def initialize(options)
  super(options.reverse_merge(:case_sensitive => true))
end

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/uniqueable/validates_uniqueable.rb', line 7

def validate_each(record, attribute, value)
  checks = record.class.uniqueable_checks[options[:group]]
  #Make the check atomic
  return unless checks
  checks.each do |klass, keys|
    keys.each do |key|
      #Check nothing exists with this pair
      conditions = []
      if key.kind_of?(Hash)
        conditions = key[key.keys.first][:conditions]
        key = key.keys.first
      end
      if options[:case_sensitive]
        result = klass.where(["#{key} = ?", value]).where(conditions).all
      else
        value = value.downcase if value.kind_of?(String)
        result = klass.where(["lower(#{key}) = ?", value]).where(conditions).all
      end

      unless result.empty?
        #Check that the result isn't the record we are validating
        unless result.first == record
          return record.errors.add(attribute, :taken)
        end
      end
    end
  end
end