Class: ActiveGraph::Node::Validations::UniquenessValidator

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

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ UniquenessValidator

Returns a new instance of UniquenessValidator.



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# File 'lib/active_graph/node/validations.rb', line 22

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

Instance Method Details

#found(record, attribute, value) ⇒ Object 



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# File 'lib/active_graph/node/validations.rb', line 32

def found(record, attribute, value)
  scopes, attributes = Array(options[:scope] || []).partition { |s| s.is_a?(Proc) }
  conditions = scope_conditions(record, attributes)

  # TODO: Added as find(:name => nil) throws error
  value = '' if value.nil?

  conditions[attribute] = options[:case_sensitive] ? value : /#{Regexp.escape(value.to_s)}/i

  found = if scopes.empty?
            record.class.as(:result)
          else
            scopes.reduce(record) { |proxy, scope| proxy.instance_eval(&scope) }
          end.where(conditions)
  found = found.where_not(neo_id: record.neo_id) if record._persisted_obj
  found
end

#message(instance) ⇒ Object 



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# File 'lib/active_graph/node/validations.rb', line 50

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

#scope_conditions(instance, attributes) ⇒ Object 



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# File 'lib/active_graph/node/validations.rb', line 54

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

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/active_graph/node/validations.rb', line 26

def validate_each(record, attribute, value)
  return unless found(record, attribute, value).exists?

  record.errors.add(attribute, :taken, **options.except(:case_sensitive, :scope).merge(value: value))
end