type of ruby ​​rails session variable

denk01

The code for calling session in the rails controller is as follows:
session [: cart}] ...
Why is there no @ sign in front of the session.
Similarly, flash and logger have the same problem. Are they local, instance or constant variables?

名字全被用了

Here session is a HASH type object, cart is a key, and session [: cart] is corresponding to this key
value

denk01

Why is there no @ sign in front of the session, no @ sign, so it becomes a local variable? Can't it be referenced by other methods?

denk01

The session does not appear to be a variable, but the message name.

ytfihc

session is actually method
Of course you can use @session, but this is not recommended

oconnel

Also not recommended is @params, you can check the documentation for details. In addition, to remind the host, session['user'] and session[:user] will return two different references...