Class: Minidoc::Validations::UniquenessValidator

Inherits:
ActiveModel::EachValidator
  • Object
show all
Defined in:
lib/minidoc/validations.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ UniquenessValidator

Returns a new instance of UniquenessValidator.



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# File 'lib/minidoc/validations.rb', line 3

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

Instance Method Details

#message(instance) ⇒ Object 



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# File 'lib/minidoc/validations.rb', line 30

def message(instance)
  super || "has already been taken"
end

#scope_conditions(instance) ⇒ Object 



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# File 'lib/minidoc/validations.rb', line 34

def scope_conditions(instance)
  Array(options[:scope]).inject({}) do |conditions, key|
    conditions.merge(key => instance[key])
  end
end

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/minidoc/validations.rb', line 7

def validate_each(record, attribute, value)
  conditions = scope_conditions(record)

  if options[:case_sensitive]
    conditions[attribute] = value
  else
    conditions[attribute] = /^#{Regexp.escape(value.to_s)}$/i
  end

  # Make sure we're not including the current document in the query
  if record._id
    conditions[:_id] = { "$ne" => record.id }
  end

  if record.class.exists?(conditions)
    record.errors.add(
      attribute,
      :taken,
      options.except(:case_sensitive, :scope).merge(value: value)
    )
  end
end