How to empty a Heroku database - ruby-on-rails-3

Question

I'm working on a Ruby on Rails 3 webapp on Heroku. How do I empty the database?

Answer 1

To drop the database, if you are using SHARED_DATABASE_URL:
$ heroku pg:reset DATABASE_URL
Now to recreate the database with nothing in it:
$ heroku run rake db:migrate
To populate the database with your seed data:
$ heroku run rake db:seed
---OR---
You can combine the last two (migrate & seed) into one action by executing this:
$ heroku run rake db:setup
Edit 2014-04-18: rake db:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-10-09: You can use rake db:setup with Rails 4. It does give you a Couldn't create database error (because the database was already created using the heroku pg:reset command). But it also loads your database schema and your seeds after the error message.
You can do this with pretty much any rake command, but there are exceptions. For example, db:reset doesn't work via heroku run rake. You have to use pg:reset instead.
More information can be found in Heroku's documentation:
Running Rake Commands
Reset Postgres DB

Answer 2

Heroku has deprecated the --db option now, so now use:
heroku pg:reset DATABASE_URL --confirm {the name of your app}
It's a little confusing because you use the literal text SHARED_DATABASE but where I have written {the name of your app} substitute the name of your app. For example, if your app is called my_great_app then you use:
heroku pg:reset DATABASE_URL --confirm my_great_app

Answer 3

To drop the database:
$ heroku pg:reset SHARED_DATABASE --confirm NAME_OF_THE_APP
To recreate the database:
$ heroku run rake db:migrate
To seed the database:
$ heroku run rake db:seed
**Final step
$ heroku restart

Answer 4

The current, ie. 2017 way to do this is:
heroku pg:reset DATABASE
https://devcenter.heroku.com/articles/heroku-postgresql#pg-reset

Answer 5

Now the command is
heroku pg:reset DATABASE_URL --confirm your_app_name
this way you can specify which app's db you want to reset.
Then you can run
heroku run rake db:migrate
heroku run rake db:seed
or direct for both above commands
heroku run rake db:setup
And now final step to restart your app
heroku restart

Answer 6

I contacted Heroku support, and they confirmed that it is a bug with the latest gem (I am using heroku-2.26.2)
Charlie - we are aware of this issue with the 'heroku' gem and are
working to fix it.
Here's the issue if you care to follow-along -
https://github.com/heroku/heroku/issues/356
Downgrading to an earlier version of the 'heroku' gem should help. I've been using v2.25.0 for most of today without issue.
Downgrade with the following commands:
gem uninstall heroku
gem install heroku --version 2.25.0
If you already have multiple gems installed, you may be presented with:
Select gem to uninstall:
1. heroku-2.25.0
2. heroku-2.26.2
3. All versions
Just uninstall #2 and rerun the command. Joy!

Answer 7

The complete answer is (for users with multi-db):
heroku pg:info - which outputs
=== HEROKU_POSTGRESQL_RED <-- this is DB
Plan Basic
Status available
heroku pg:reset HEROKU_POSTGRESQL_RED --confirm app_name
More information found in: https://devcenter.heroku.com/articles/heroku-postgresql

Answer 8

Now it's diffrent with heroku. Try:
heroku pg:reset DATABASE --confirm

Answer 9

Now it's also possible to reset the database through their web interface.
Go to dashboard.heroku.com select your app and then you'll find the database under the add-ons category, click on it and then you can reset the database.

Answer 10

Today the command
heroku pg:reset --db SHARED_DATABASE_URL
not working for shared plans, I'm resolve using
heroku pg:reset SHARED_DATABASE

Answer 11

Check your heroku version. I just updated mine to 2.29.0, as follows:
heroku --version
#=> heroku-gem/2.29.0 (x86_64-linux) ruby/1.9.3
Now you can run:
heroku pg:reset DATABASE --confirm YOUR_APP_NAME
Then create your database and seed it in a single command:
heroku run rake db:setup
Now restart and try your app:
heroku restart
heroku open

Answer 12

Login to your DB using
heroku pg:psql and type the following commands:
drop schema public cascade;
create schema public;

Answer 13

In case you prefer to use Heroku Web-site:
Go to https://postgres.heroku.com/databases
Select the database you want to reset
Click on a settings button in the right upper corner
Click "Reset Database" as shown below:
type in "RESET" and press ok

Answer 14

This is what worked for me.
1.clear db.
heroku pg:reset --app YOUR_APP
After running that you will have to type in your app name again to confirm.
2.migrate db to recreate.
heroku run rake db:migrate --app YOUR_APP
3.add seed data to db.
heroku run rake db:seed --app YOUR_APP

Answer 15

Assuming you want to reset your PostgreSQL database and set it back up, use:
heroku apps
to list your applications on Heroku. Find the name of your current application (application_name). Then run
heroku config | grep POSTGRESQL
to get the name of your databases. An example could be
HEROKU_POSTGRESQL_WHITE_URL
Finally, given application_name and database_url, you should run
heroku pg:reset `database_url` --confirm `application_name`
heroku run rake db:migrate
heroku restart

Answer 16

If you are logged in from the console, this will do the job in the latest heroku toolbelt,
heroku pg:reset --confirm database-name

Answer 17

I always do this with the one-liner 'heroku pg:reset DATABASE'.

Answer 18

Best solution for you issue will be
heroku pg:reset -r heroku --confirm your_heroku_app_name
--confirm your_heroku_app_name
is not required, but terminal always ask me do that command.
After that command you will be have pure db, without structure and stuff, after that you can run
heroku run rake db:schema:load -r heroku
or
heroku run rake db:migrate -r heroku