Don't know how to build task 'db:create'

Question

I'm migrating from a sqllite db to mysql2. I have mysql running (and changed database.yml) but for some reason my rake db:create comes back with:

rake aborted!
Don't know how to build task 'db:create'

When I do a: rake -T, no db tasks appear in the list.

I'm on Rails 3.2.9

What obvious thing am I missing here?

Answer 1

Just figured it out. Someone had commented out the following in application.rb:

require 'rails/all'

Once put back rake -T returns the db tasks.

Answer 2

For people landing here in 2019:

If you ran rails new with -O (Capital 'O') or --skip-activerecord and want to add a database later, you need to uncomment this in application.rb to enable the Active Record framework:

require "active_record/railtie"

Edit:
You will also need to create the following structure in your application's root dir:

your_app
  |_config
    |_ database.yml
  |_db
    |_ migrate
    |_ schema.rb

then run:
rake db:schema:dump