part_0_B.md

Part 0 (B): Preparation: deploy to Heroku

If you have deployed to Heroku before, just create a new app container with heroku create. If this is your first time deploying to Heroku, you will need to do two things. First, sign up for a free Heroku account. The basic command you need is the following, but see the Heroku page for more details.

On AWS Cloud9, use the following commands to install Heroku. If Heroku commands give error messages later, you may need to rerun these two commands.

$ nvm i v8
$ npm install -g heroku

Once the Heroku CLI is available, you can log in.

$ heroku login -i

Once your account is set up (a one-time process), you should be able to create an "app container" on Heroku into which you'll deploy RottenPotatoes:

$ heroku create

Heroku will assign your app a whimsical name such as luminous-coconut-237; once your app is deployed, you would access it at http://luminous-coconut-237.herokuapp.com. You can login to the Heroku website if you want to change the name of your app.

Finally, we deploy our app to Heroku:

$ git push heroku master

(You may see the following warning the first time - it's fine---answer "yes", and in the future you shouldn't see it anymore:)

The authenticity of host 'heroku.com (50.19.85.132)' can't be established.
RSA key fingerprint is 8b:48:5e:67:0e:c9:16:47:32:f2:87:0c:1f:c8:60:ad.
Are you sure you want to continue connecting (yes/no)? 
Please type 'yes' or 'no':

Is the app running on Heroku? If you navigate to the heroku URL that is printed at the end of the results from git push heroku master you'll get a "We're sorry, but something went wrong." error in the browser.

We can get a hint as to why by running the following command:

$ heroku logs

which will show an error like:

ActionView::Template::Error (PG::UndefinedTable: ERROR:  relation "movies" does not exist

Just as we ran rake db:migrate and rake db:seed to do first-time database creation locally, we must also cause a database to be created on the Heroku side:

$ heroku run rake db:migrate

and

$ heroku run rake db:seed

Now you should be able to navigate to your app's URL. heroku open opens your browser to that URL in case you forgot it, however this command does not work on c9, where you will need to navigate to the relevant URL.

Note: don't proceed past this point until you are able to complete the above successfully, or you won't be able to receive a grade for this assignment!

Next: Part 1: Sort the list of movies