What is the correct way to implement the LIKE functionality in Rails?

Question

Ruby on Rails

How to make likes that will work quickly? Let's say, as in modern social networks.
Should I use a non-relational database? How do they generally solve such a problem, so that it is scalable?

Answer 1

You can use the ready-made gem for this acts_as_votable .

Answer 2

And what can be slow in the field value increment in the database?
In general, it is not clear what fast means, by what criteria.

Answer 3

Used counter_cache on a big news portal. There were no brakes. But for a highload, I would still look towards Redis.

Answer 4

Well, the meaning of the rails is to use for likes, well, write on ruby ​​event machines, do not suffer from idiocy.