Preload, Eagerload, Includes and Joins
Rails provides four different ways to load association data. In this blog we are going to look at each of those. Preload Preload loads the association data in a separate query. 1User.preload(:posts).to_a 2 3# => 4SELECT "users".* FROM "users" 5SELECT "posts".* FROM "posts" WHERE "posts"."user_id" IN (1)Copy This is how includes loads data in the default case. Since preload always generates two sql
Cookies on Rails
Let's see how session data is handled in Rails 3.2 . If you generate a Rails application in 3.2 then ,by default, you will see a file at config/initializers/session_store.rb. The contents of this file is something like this. 1Demo::Application.config.session_store :cookie_store, key: '_demo_session'Copy As we can see _demo_session is used as the key to store cookie data. A single site can have coo
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alias vs alias_method
