```ruby
class Hint < ActiveRecord::Base
  validates :hint, presence: true, length: { maximum: 500 }
  validates :priority, presence: true, numericality: true
  validates :points,  presence: true, inclusion: { in: 0..1000 }

  def decrement_pointer_counter
    if self.pointer_counter <= 1
      self.destroy
    else
      update_attribute(:pointer_counter, self.pointer_counter - 1)
    end
  end

  def increment_pointer_counter
    if self.pointer_counter
      update_attribute(:pointer_counter, self.pointer_counter + 1)
    else
      update_attribute(:pointer_counter, 1)
    end
  end

end
```

Remove limit in point value and fix error messages
user
```ruby
class Hint < ActiveRecord::Base
  validates :hint, presence: true, length: { maximum: 500 }
  validates :priority, presence: true, numericality: true
  validates :points,  presence: true, numericality: { only_integer: true, greater_than: 0 }

  def decrement_pointer_counter
    if self.pointer_counter <= 1
      self.destroy
    else
      update_attribute(:pointer_counter, self.pointer_counter - 1)
    end
  end

  def increment_pointer_counter
    if self.pointer_counter
      update_attribute(:pointer_counter, self.pointer_counter + 1)
    else
      update_attribute(:pointer_counter, 1)
    end
  end

end
```
assistant