Module: Ohm::Model::Validations

Includes:
Validations
Included in:
Ohm::Model
Defined in:
lib/ohm.rb

Overview

All validations which need to access the Redis database goes here. As of this writing, #assert_unique is the only assertion contained within this module.

Instance Method Summary (collapse)

Methods included from Validations

#assert, #assert_format, #assert_numeric, #assert_present, #errors, #valid?, #validate

Instance Method Details

- (Object) assert_unique(:name) - (Object) assert_unique([:street, :city])

Validates that the attribute or array of attributes are unique. For this, an index of the same kind must exist.

Overloads:

  • - (Object) assert_unique(:name)

    Validates that the name attribute is unique.

  • - (Object) assert_unique([:street, :city])

    Validates that the :street and :city pair is unique. 



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# File 'lib/ohm.rb', line 948

def assert_unique(atts, error = [atts, :not_unique])
  indices = Array(atts).map { |att| index_key_for(att, send(att)) }
  result  = db.sinter(*indices)

  assert result.empty? || !new? && result.include?(id.to_s), error
end