I am upgrading my rails app from Sqlite3 to Postgresql. I am using Ansible to setup my server and Capistrano to deploy. I was able to successfully run ansible and now I'm trying to deploy my branch to an existing server that had Sqlite3 installed on it.
On the capistrano step:
deploy:assets:precompile
I get this error
$HOME/.rbenv/bin/rbenv exec bundle exec rake assets:precompile
01 rake aborted!
01 Gem::LoadError: Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).
But I don't understand. I have Postgresql set up in my branch I'm trying to deploy.
Here is my database yml file.
default: &default
adapter: postgresql
encoding: unicode
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
timeout: 5000
development:
<<: *default
database: {appname}_development
test:
<<: *default
database: {appname}_test
staging:
<<: *default
database: {appname}_staging
username: <%= Rails.application.secrets[:db_username] %>
password: <%= Rails.application.secrets[:db_password] %>
Obviously changed {appname} with my actual application's name. I didn't include a production key cause this app does not have a production website only a staging server. It is more of a playground I use for rails.
Does anyone have any experience with fixing this issue? I'm really not sure if there is an issue with the Capfile or if I'm missing something. Thanks (and let me know if you need more of my code)
Worth noting this app is still running Rails 5.1 (I'm going to update this next I just wanted to get it on a Postgres db first)
EDIT: OK I am onto something. i discovered that this capistrano step:
04 ln -s /var/www/{appname}/shared/config/database.yml /var/www/{appname}/releases/20190923224949/config/database.yml
Is not updating my database yml to be the updated postgres db. I'm guessing I'm missing something somewhere. :cry:
I GOT IT. I'M A GENIUS.
I had to rereun the webserver playbook to get my database.yml file onto the server.
I'm new on RoR. I build a little app using ActiveAdmin and Devise and I wish to deploy it on Heroku.
When I had push my app on Heroku it run properly but the db seems to be empty ! In effect, my local login dont match when I try to log in my ActiveAdmin administration panel...
In addition, the others db of my app are totaly empty...
I guess that i had not fill the database.yml correctly but I dont find how I'm suppose to do it... :/
Database.yml :
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# 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:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
I would be grateful if you could help me or direct me to a solution!
Thank you for your attention ! ^^
production:
<<: *default
database: db/production.sqlite3
You can't use sqlite3 on heroku, because it is filesystem-based and on each restart a new dyno is created, with a completely new filesystem. The old dyno is killed and your sqlite3 data file with it.
Use a client-server DB on heroku, like Postgresql. This is well covered in heroku guides.
These steps is how to push the local database to heroku and to create database
heroku pg:backups:restore 'https://s3.amazonaws.com/me/items/3H0q/mydb.dump' DATABASE_URL
Get database info
heroku pg
-> Gave me the name of the database
eg: HEROKU_POSTGRESQL_CYAN
Reset the database on heroku
heroku pg:reset HEROKU_POSTGRESQL_CYAN
Look for the name of the local database
Opened config/database.yml and found the database
name for the development environment.
eg: fashions_development => put the name that the terminal give it to you
Run push the local database to Heroku
Opened config/database.yml and found the database
heroku pg:push fashions_development HEROKU_POSTGRESQL_CYAN
So I've followed all of the guides I can find online for this issue, including similar stack posts, but things are not working.
I ran the command
heroku config:get DATABASE_URL
and got
postgres://<username>:<password>#<host_name>:<port>/<dbname>
(with all of the <> parts being my DB info of course) and ran
pg_dump --host=<host_name> --port=<port> --username=<username> --password <dbname> > output.sql
At this point I needed to run
psql -d <local_database_name> -f output.sql
but my rails app followed the Michael Hartl tutorial which uses sqlite3, so I had to switch things over. I tried this by changing my database.yml file to
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: postgresql
encoding: unicode
# adapter: sqlite3
pool: 5
timeout: 5000
development:
<<: *default
database: db/development
# database: db/development.sqlite3
# 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:
<<: *default
database: db/test
# database: db/test.sqlite3
production:
<<: *default
database: db/production
# database: db/production.sqlite3
I also changed the Gemfile to use 'pg' instead of 'sqlite3' in development. At this point I ran bundle install and tried rails db:setup and rails db:migrate which did not create the databases (.. uh oh) and when I run the final step of
psql -d db/development -f db/output.sql
I get plenty of console output, but when I run a rails console sandbox, there is no user info from my Heroku database. Did I miss a step? What's going on? (I'm working on Ubuntu 14.04)
Edit:
First, I undid all of the local changes I made above. Then, I ended up following a combo of the above and the guide here http://manuelvanrijn.nl/blog/2012/01/18/convert-postgresql-to-sqlite/. I used heroku config:get DATABASE_URL to get all of the needed host, port, username, etc. info and then pulled the data with
pg_dump --host=<host_name> --port=<port> --username=<username> --password --data-only --inserts <dbname> > dump.sql
After that I followed the postgresql to sqlite database conversion (the "Longer story a.k.a please explain a little more." version) I linked above. I did all of the edits described in step 2 as well as having to remove a bunch of SELECT statements at the end of dump.sql. Another change I had to make was replacing all INSERT INTO instances with INSERT OR REPLACE INTO to satisfy some unique constraint errors in step 4. That did it!
I'm trying to use rails 4.2.6 to develop an app. I'm trying to use postgres for database. Server starts fine but when I try loading a page it throws this "No connection pool for ActiveRecord::Base" error.
What could it be?
EDIT
The pg gem wasn't working properly. I had to comment it before starting the server and then uncomment it from my GemFile afterwards. I realized that I was using Ruby 2.3 instead of Ruby 2.0 (as intended). I removed ruby 2.3 and set up everything under ruby 2.0 environment. It's now working properly.
I had read somewhere that there were some issues with the 'pg' gem in newer Rails releases, requiring people to use 'gem install pg --pre' instead for installing the gem. I tried that, but then my app was requiring the 'pg' gem in my GemFile and, well, the problem stated above showed up again.
This is how my database.yml file ended up:
default: &default
adapter: postgresql
encoding: unicode
host: localhost
username: -------
password: -------
pool: 5
development:
<<: *default
database: myDbName
If you are experiencing this error from a rake task, chances are you are not running the :environment task before your task.
Changing:
task :task_name do
end
to:
task task_name: :environment do
end
Should fix the issue.
This issue arises when the server cannot find the corresponding database it depends on to pull data from.
I had same issue from my end, I updated my version of Sqlite3, and it was higher than the version that the current Puma Server version supports.
I simply had to uninstall the Sqlite3 version, and then install the version supported by the current version of Puma Server.
gem uninstall sqlite3
This will uninstall the updated version of Sqlite3, and then you run the code below stating the version supported by your current server.
gem install sqlite3
Or you can as well open your Gemfile, and then include the version for the database that you are using
gem 'sqlite3', '~> 1.3.6'
N/B: The sqlite3 version is the most current version as at the time of writing this answer
And then run
bundle update
to install the version of the database that you specified.
That's all.
I hope this helps.
For PostgreSQL your database.yml file should look something like that:
default: &default
adapter: postgresql
encoding: unicode
# For details on connection pooling, see rails configuration guide
# http://guides.rubyonrails.org/configuring.html#database-pooling
pool: 5
development:
<<: *default
database: your_db_name
Also make sure that you have the gem installed: in your Gemfile:
gem 'pg'
Finally, restart your server.
Hope that helps
Edit: I almost forgot, make sure you have your PostgresSQL running, check this link for download and setup.
Check the database.yml if all settings are ok. If its the first time and you didn't create the database yet use this command to create the database
rake db:create
If the database already exists try reset the db migrations,
rake db:migrate:reset
Hope it'll solve the problem. Go to rails console and try something to check if its working or not.
I had to simply restart the server for the warning to go away.
I've encountered the same problem when I try to access the Model before creating the DataBase.
Make sure you run rake db:migrate at least once.
If you already run migration then check the Database as mentioned in previous answers.
In my case, the config/database.yml was taking variables from the environment:
# ...
test:
<<: *default
database: <%= ENV.fetch("DB_NAME") %>_test
username: <%= ENV.fetch("DB_USER") %>
password: <%= ENV.fetch("DB_PASS") %>
# ...
The error was coming when the new terminal window where I was running the bundle exec rails spec did not have those variables initialized.
Doing,
$ export DB_NAME=mydb
$ export DB_USER=myuser
$ export DB_PASS=mypass
$ bundle exec rails spec
fixed the issue.
I had to restart the server, and make sure you entered username and password. Create development and test databases
when you are running rails db:migrate in data base rows will be created according to your migration files. you can see schema for further info.
Rails 5
New app
Using Postgresql for both test and development
Specs run, so Rails can connect to Postgresql
But when I started the web app, I got "No connection pool with id primary found."
Ran 'bin/rails db:migrate:reset' and restarted the app. It worked. No idea why.
database.yml:
development:
adapter: postgresql
encoding: unicode
database: rails5_development
pool: 5
username: foo
password: bar
host: localhost
port: 5432
test:
adapter: postgresql
encoding: unicode
database: rails5_test
pool: 5
username: foo
password: bar
host: localhost
port: 5432
I am new to Rails. I pushed my toy app from cloud9 to Heroku and magically my Heroku app is using a PostgreSQL even though my database.yml from the Heroku toolbelt for my app at Heroku is as follows:
# SQLite version 3.x
# gem install sqlite3
#
# Ensure the SQLite 3 gem is defined in your Gemfile
# gem 'sqlite3'
#
default: &default
adapter: sqlite3
pool: 5
timeout: 5000
development:
<<: *default
database: db/development.sqlite3
# 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:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
I know it's using a PostgreSQL because I can remotely access the DB using pgAdmin III.
So what's happening inside Heroku?
When using Heroku, the Heroku server will inject its own database yml file (That will use database url).
This is why the database.yml in your code will have no effect.
You can read more here
https://devcenter.heroku.com/articles/rails-database-connection-behavior
Heroku does not allow the use of SQLite. It will use PostgreSQL and will automatically creates one for you when you upload your app.
SQLite is not really made to be a production database. Since SQLite runs in memory, if you used it as a database on Heroku your entire database would be cleared once per day. There is more information here.
I am actually surprised you did not get any errors when deploying. In the past when I had accidentally left SQLite on, I always got a "push failed".
Heroku has a really good tutorial for changing your database from SQLite to PostgreSQL.