CODEWITHSUNDEEP
ruby-on-rails
Beetlejuice
Beetlejuice

Reputation: 4425

Rails 3.2 cache not working

I'm using Rails.cache.write and Rails.cache.read to store some activerecord objects, but it not seems to be workinkg.

posts = Post.find(...)
Rails.cache.write(myKey, posts)

... next request...

foo = Rails.cache.read(myKey)

Despite variable foo is correctly filled, this generate the same sql logs. If I change database during "...", I got news results.

What could be happen?

Upvotes: 1

Views: 54

Answers (2)

Athar
Athar

Reputation: 3268

Try this. it will expire in 30 secs.

Rails.cache.fetch("posts_for_#{myKey}", expires_in: 30.seconds) do
  posts = Post.find(...)
  posts
end

put this in some kind of method and pass that method myKey and ... for posts and it should work. it will return from cache if exists else query on it

Upvotes: 0

Anatoly
Anatoly

Reputation: 15530

It is recommended to cache serialised data (results only), not an ActiveRecord object with its own class name and individual object id.

Fetch technique is also preferred 

Rails.cache.fetch(myKes) do
  Post.find(...).as_json
end

Upvotes: 2

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