Conditional paperclip presence verification

Question

How can I verify a paperclip attachment does not exist if another field does exist? I tried:

validates_attachment :img, presence: false, if: :some_other_field?
def some_other_field?
  some_other_field
end

This is what I settled on, but I'm still looking for a more elegant way: `validates :img_file_name, absence: true, if: :some_other_field?` — lwiseman, Aug 26 '13 at 23:19

Steve Root · Accepted Answer · 2013-10-02T10:21:42.580

2

Similar problem here, my solution was to make the comparison in the def

validate :check_image_with_title 

def check_image_with_title
   if !ctitle.blank? and cimage.blank?
      #If ctitle IS NOT empty and cimage IS empty, add a custom error message
      errors.add :key, "You need an image to go with your title"
      return false
    else
      return true
   end 
end

edited Oct 02 '13 at 10:21

answered Oct 02 '13 at 09:33

Steve Root

368
3
13

techvineet · Answer 2 · 2013-08-26T13:21:27.010

1

Try this:-

validates_attachment :img, presence: true, if: :some_other_field?
def some_other_field?
  some_other_field.present?
end

edited Aug 26 '13 at 13:21

answered Aug 26 '13 at 13:02

techvineet

5,041
2
30
28

score 0 · Answer 3 · answered Aug 26 '13 at 13:21

0

Have you tried to use exists? instead present?, could be works

validates_attachment :img, presence: false, if: :some_other_field?
def some_other_field?
  some_other_field.exists?
end

answered Aug 26 '13 at 13:21

Cezinha Cezer

38
5

Just tried it this way as well as techvineet's way and Aman's way. No dice. – lwiseman Aug 26 '13 at 13:23

Conditional paperclip presence verification

3 Answers3