Rails 5: ActiveRecord OR query
The ability to chain or clause along with where clause in ActiveRecord query will be available in Rails 5. See the related discussion and the pull request.
So, you will be able to do the following things in Rails 5:
To get a post with id 1 or 2:
Post.where('id = 1').or(Post.where('id = 2'))Some other examples:
(A && B) || C:
Post.where(a).where(b).or(Post.where(c))(A || B) && C:
Post.where(a).or(Post.where(b)).where(c)
(Just an addition to the answer by K M Rakibul Islam.)
Using scopes, the code can become prettier (depending on the eyes looking):
scope a, -> { where(a) }scope b, -> { where(b) }scope a_or_b, -> { a.or(b) }