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Mongoid::Validations::UniquenessValidator

Validates whether or not a field is unique against the documents in the database.

@example Define the uniqueness validator.

class Person
  include Mongoid::Document
  field :title

  validates_uniqueness_of :title
end

Attributes

klass[R]

Public Instance Methods

setup(klass) click to toggle source

Unfortunately, we have to tie Uniqueness validators to a class.

@example Setup the validator. UniquenessValidator.new.setup(Person)

@param [ Class ] klass The class getting validated.

@since 1.0.0

# File lib/mongoid/validations/uniqueness.rb, line 28
def setup(klass)
  @klass = klass
end
validate_each(document, attribute, value) click to toggle source

Validate the document for uniqueness violations.

@example Validate the document.

validate_each(person, :title, "Sir")

@param [ Document ] document The document to validate. @param [ Symbol ] attribute The field to validate on. @param [ Object ] value The value of the field.

@return [ Errors ] The errors.

@since 1.0.0

# File lib/mongoid/validations/uniqueness.rb, line 44
def validate_each(document, attribute, value)
  with_query(document) do
    attrib, val = to_validate(document, attribute, value)
    return unless validation_required?(document, attrib)
    if document.embedded?
      validate_embedded(document, attrib, val)
    else
      validate_root(document, attrib, val)
    end
  end
end

[Validate]

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