Lupu Alexandru Emil
|| at Feb 5, 2012 at 3:47 pm
First of all, if there are 2 models ... then i think you got it wrong ... assuming you have
class Book < ActiveRecord::Base
class BookExpire < ActiveRecord::Base
class Like < ActiveRecord::Base
Then you could add " , :counter_cache => true " to the belongs_to association (if needed add a likes_count field in the Book table)
if you do that .., then you could do a very easy query like
@books = Book.joins(:book_expire).all.order(' likes_count ASC, book_expires.end_at DESC') # and i would add a limit ()
have a look here : http://railscasts.com/episodes/23-counter-cache-column
(even the move uses rails 2.x ... the concept and syntax is still valid )
On Feb 3, 2012, at 9:44 PM, Abhishek shukla wrote:
I have a rails application where requirement is that, I want to display books based on likes and expiry date..
I am using the following query
"select books.*, (select count(*) from likes where likes.book_id = books.id) as ct
from books, book_expires where book_expires.book_id = books.id order by ct ASC, book_expires.end_at DESC"
And the output I am getting is on the bases of count not end_date..
Please let me know where I am getting wrong thanks...
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