Class: ActiveEntity::Validations::UniquenessOnActiveRecordValidator

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

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ UniquenessOnActiveRecordValidator

Returns a new instance of UniquenessOnActiveRecordValidator.



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# File 'lib/active_entity/validations/uniqueness_on_active_record.rb', line 6

def initialize(options)
  if options[:conditions] && !options[:conditions].respond_to?(:call)
    raise ArgumentError, "#{options[:conditions]} was passed as :conditions but is not callable. " \
                         "Pass a callable instead: `conditions: -> { where(approved: true) }`"
  end
  unless Array(options[:scope]).all? { |scope| scope.respond_to?(:to_sym) }
    raise ArgumentError, "#{options[:scope]} is not supported format for :scope option. " \
      "Pass a symbol or an array of symbols instead: `scope: :user_id`"
  end
  super

  @klass =
    if options[:class].present?
      options[:class]
    elsif options[:class_name].present?
      options[:class_name].safe_constantize
    else
      nil
    end

  unless @klass
    raise ArgumentError, "Must provide one of option :class_name or :class."
  end
  unless @klass < ActiveRecord::Base
    raise ArgumentError, "Class must be an Active Entity model, but got #{@klass}."
  end
  if @klass.abstract_class?
    raise ArgumentError, "Class can't be an abstract class."
  end
end

Instance Method Details

#validate_each(record, attribute, value) ⇒ Object 



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# File 'lib/active_entity/validations/uniqueness_on_active_record.rb', line 37

def validate_each(record, attribute, value)
  finder_class = find_finder_class_for(record)
  value = map_enum_attribute(finder_class, attribute, value)

  relation = build_relation(finder_class, attribute, value)
  relation = scope_relation(record, relation)
  relation = relation.merge(options[:conditions]) if options[:conditions]

  if relation.exists?
    error_options = options.except(:case_sensitive, :scope, :conditions)
    error_options[:value] = value

    record.errors.add(attribute, :taken, **error_options)
  end
end