Class: ActiveRecord::PredicateBuilder::ArrayHandler

Inherits:
Object
  • Object
show all
Defined in:
activerecord/lib/active_record/relation/predicate_builder/array_handler.rb

Overview

:nodoc:

Defined Under Namespace

Modules: NullPredicate

Instance Method Summary collapse

Instance Method Details

#call(attribute, value) ⇒ Object


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# File 'activerecord/lib/active_record/relation/predicate_builder/array_handler.rb', line 6

def call(attribute, value)
  values = value.map { |x| x.is_a?(Base) ? x.id : x }
  nils, values = values.partition(&:nil?)

  if values.any? { |val| val.is_a?(Array) }
    ActiveSupport::Deprecation.warn(<<-MSG.squish)
      Passing a nested array to Active Record finder methods is
      deprecated and will be removed. Flatten your array before using
      it for 'IN' conditions.
    MSG

    flat_values = values.flatten
    values = flat_values unless flat_values.include?(nil)
  end

  return attribute.in([]) if values.empty? && nils.empty?

  ranges, values = values.partition { |v| v.is_a?(Range) }

  values_predicate =
    case values.length
    when 0 then NullPredicate
    when 1 then attribute.eq(values.first)
    else attribute.in(values)
    end

  unless nils.empty?
    values_predicate = values_predicate.or(attribute.eq(nil))
  end

  array_predicates = ranges.map { |range| attribute.between(range) }
  array_predicates.unshift(values_predicate)
  array_predicates.inject { |composite, predicate| composite.or(predicate) }
end