Rails 3 cheat sheets?

Question

Ruby on Rails

I started studying Rails, in principle I am familiar with MVC, so it is not difficult to master it. The only problem is that it is difficult to keep in mind a lot of "chips" of this framework. Therefore, I would like you to advise cheat sheets (cheat sheets) with the maximum possible amount of information that could be printed and peeped into them.
As I understand it, rails evolve at a very fast rate, losing compatibility with previous versions, so I would like to have the most up-to-date information at the moment. On the Internet there are only tables of two or three years ago.

Answer 1

I just noticed that rusrails.ru is up on Joomla! and nginx. This is a fail, comrades.

Answer 2

Find it, write where ;)

Answer 3

In fact, the transition from 2 to 3 is the only difficult transition, a big jump with loss of compatibility. Prior to this, there were almost no problems at all.
And so I can only advise rusrails.ru , where you can read about the main points during the development of any applications.

Answer 4

A collection of documentation is here:
apidock.com/ruby
apidock.com/rails
You can just read about what you are currently working with and see how it can be upgraded or used more efficiently

Answer 5

railsapi.com/
Here is a handy documentation, maybe off topic =)

Answer 6

Here are the new topical Rails 3 Cheat Sheets