class ActiveRecord::Relation::QueryAttribute

def ==(other)
  super && value_for_database == other.value_for_database
end

def hash
  [self.class, name, value_for_database, type].hash
end

def infinite?
  infinity?(value_before_type_cast) || serializable? && infinity?(value_for_database)
end

def infinity?(value)
  value.respond_to?(:infinite?) && value.infinite?
end

def initialize(...)
  super
  # The query attribute value may be mutated before we actually "compile" the query.
  # To avoid that if the type uses a serializer we eagerly compute the value for database
  if value_before_type_cast.is_a?(StatementCache::Substitute)
    # we don't need to serialize StatementCache::Substitute
  elsif @type.serialized?
    value_for_database
  elsif @type.mutable? # If the type is simply mutable, we deep_dup it.
    @value_before_type_cast = @value_before_type_cast.deep_dup
  end
end

def nil?
  unless value_before_type_cast.is_a?(StatementCache::Substitute)
    value_before_type_cast.nil? ||
      (type.respond_to?(:subtype) || type.respond_to?(:normalizer)) && serializable? && value_for_database.nil?
  end
end

def type_cast(value)
  value
end

def unboundable?
  unless defined?(@_unboundable)
    serializable? { |value| @_unboundable = value <=> 0 } && @_unboundable = nil
  end
  @_unboundable
end

def value_for_database
  @value_for_database = _value_for_database unless defined?(@value_for_database)
  @value_for_database
end

def with_cast_value(value)
  QueryAttribute.new(name, value, type)
end