Listing < AR
has_many :images
accepts_nested_attributes_for :images, :allow_destroy => true
validate :validate_image_count
def validate_image_count
errors.add_to_base("too few") if images.length < 1
end
end
Image < AR
belongs_to :listing
end
In my Listing#edit form I use fields_for to provide fields for all the images along with checkboxes to delete images. This is working fine. I want to enforce a check such that a listing is valid only if it had at least one image and at most 6.
In my current setup I can go to edit and delete all the images, and then update the listing.
I have tried using a validation as shown above but thats not being called. Could be just the way nested_attributes work in rails. Whats the best way to enforce this check?
as the images won't be deleted when you call the validation method it would return true on the image length. You can use marked_for_destruction?
def validate_image_count
errors.add_to_base("too few") self.images.any? { |i| i.marked_for_destruction? }
end