Rails SQL injection?

Question

In Rails, when I want to find by a user given value and avoid SQL injection (escape apostrophes and the like) I can do something like this:

Post.all(:conditions => ['title = ?', params[:title]])

I know that an unsafe way of doing this (possible SQL injection) is this:

Post.all(:conditions => "title = #{params[:title]}")

My question is, does the following method prevent SQL injection or not?

Post.all(:conditions => {:title => params[:title]})

score 39 · Accepted Answer · answered Jun 02 '10 at 23:10

39

Yes, it does. Only the second one is dangerous.

answered Jun 02 '10 at 23:10

fphilipe

score 8 · Answer 2 · edited Feb 25 '13 at 07:01

8

One good reference from the RoR Guides.

edited Feb 25 '13 at 07:01

Ja͢ck

answered Jun 02 '10 at 23:13

edthix

score 5 · Answer 3 · answered Jun 02 '10 at 23:12

5

+1 @fphilipe and @yuval Check this 5 min video from railscast and this one from rails guide

answered Jun 02 '10 at 23:12

Mohit Jain

Thanks, I've seen this already but it doesn't cover my question (pertaining to the last find) – Yuval Karmi Jun 02 '10 at 23:48

3 Answers3