Ruby on Rails - Creating Wrong Schema.rb File?

Question

Am I correct in saying that the db/schema.rb file should be pulling from the db/migrate files on rake db:migrate? I am running a rake db:migrate and it is adding a table that isn't defined in the migrate, nor the models. Any ideas?

Migrate Files (just one):

class CreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.string :email
      t.string :hashed_password
      t.timestamps
    end
  end
end

Resulting Schema after rake:

ActiveRecord::Schema.define(:version => 20121113214159) do

  create_table "user_categories", :force => true do |t|
    t.string   "title"
    t.string   "description"

    t.datetime "created_at",  :null => false
    t.datetime "updated_at",  :null => false
  end

  create_table "users", :force => true do |t|
    t.string   "email"
    t.string   "hashed_password"

    t.datetime "created_at",                  :null => false
    t.datetime "updated_at",                  :null => false
  end

end

I had added a user_categories scaffolding earlier, but incorrectly so I destroyed it. Not sure where I went wrong in destroying parts...

Answer 1

If you don't have any important data on your db, you could run rake db:drop then rake db:create . Then run rake db:migrate and it should update your schema clean.

Answer 2

It's important to note that rake db:migrate will poll your database for its current state (separate of migrations) and update schema.rb accordingly. If you go into SQL command line and add a table, for example, and then run rake db:migrate , schema.rb will reflect that new table whether there's a migration or not.

Answer 3

Could be that your forgot to define environment variables.

1. Open Gemfile and verify that you don't use the sqlite gem for your environment
2. Type the rake db:drop then rake db:drop commands if as output you receive empty string probably you forgot to setup environment variables
3. Checkout the config/database.yml file and find places where you could use them. You should find something like that: database: <%= ENV["<DB_NAME"] %>
4. Ensure that your variables has been set before. If you use the dotenv or figaro gems, probably you forgot to create appropriate file or define variables there