Question

I’ve followed the Rails Tutorial up to the linked point.

Here’s the shell output:

jrhorn424 at hook in ~/Learning/rails/rails-tutorial/demo_app on master
$ heroku run rake db:migrate          
Running rake db:migrate attached to terminal... up, run.2

### Snip ###

Migrating to CreateUsers (20120310145100)
Migrating to CreateMicroposts (20120311052021)
rake aborted!
database configuration does not specify adapter

Tasks: TOP => db:schema:dump
(See full trace by running task with --trace)

I’ve consulted the Heroku quick start, and done a bit of Googling. I suspected the problem was with config/database.yml since that is full of references to sqlite3 in my development environment. However, on the server, the same file includes these lines, among others:

adapter = uri.scheme
adapter = "postgresql" if adapter == "postgres"

Adding data through the deployed application succeeds, but running heroku run rake db:migrate still fails.

Here’s my Gemfile:

source 'https://rubygems.org'

gem 'rails', '3.2.2'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

group :development do
    gem 'sqlite3', '1.3.5'
end

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '3.2.4'
  gem 'coffee-rails', '3.2.2'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer'

  gem 'uglifier', '1.2.3'
end

gem 'jquery-rails', '2.0.0'

group :production do
    gem 'pg', '0.12.2'
end

Answer 1

I would recommend dropping your databases with:

bundle exec rake db:drop:all

If you are going to be hosting on heroku, go ahead and use postgres for all of your environments. Delete the sqlite gem and just include

gem 'pg'

near the top of your Gemfile.

Peform a:

bundle
bundle exec rake db:create
bundle exec rake db:migrate

Try to commit and push again (you know how to do that already).

Let me know if that doesn’t work.

PS, here is what my database.yml file looks like:

# PostgreSQL v0.8.x
#   gem install pg
 development:
  adapter: postgresql
  encoding: unicode
  host: localhost
  database: health_development
  pool: 5
  username: volpine
  password: password

  # Warning: The database defined as "test" will be erased and
  # re-generated from your development database when you run         "rake".
  # Do not set this db to the same as development or production.
 test:
  adapter: postgresql
  encoding: unicode
  host: localhost
  database: health_test
  pool: 5
  username: volpine
  password: password

production:
  adapter: postgresql
  encoding: unicode
  host: localhost
  database: health_production
  pool: 5
  username: volpine
  password: password