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Last active October 24, 2023 20:39
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Rails rake tasks for dump & restore of PostgreSQL databases
# lib/tasks/db.rake
namespace :db do
desc "Dumps the database to db/APP_NAME.dump"
task :dump => :environment do
cmd = nil
with_config do |app, host, db, user|
cmd = "pg_dump --host #{host} --username #{user} --verbose --clean --no-owner --no-acl --format=c #{db} > #{Rails.root}/db/#{app}.dump"
end
puts cmd
exec cmd
end
desc "Restores the database dump at db/APP_NAME.dump."
task :restore => :environment do
cmd = nil
with_config do |app, host, db, user|
cmd = "pg_restore --verbose --host #{host} --username #{user} --clean --no-owner --no-acl --dbname #{db} #{Rails.root}/db/#{app}.dump"
end
Rake::Task["db:drop"].invoke
Rake::Task["db:create"].invoke
puts cmd
exec cmd
end
private
def with_config
yield Rails.application.class.parent_name.underscore,
ActiveRecord::Base.connection_config[:host],
ActiveRecord::Base.connection_config[:database],
ActiveRecord::Base.connection_config[:username]
end
end
# dump the development db
rake db:dump
# dump the production db
RAILS_ENV=production rake db:dump
# dump the production db & restore it to the development db
RAILS_ENV=production rake db:dump
rake db:restore
# note: config/database.yml is used for database configuration,
# but you will be prompted for the database user's password
@farlin
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farlin commented May 9, 2022

You guys are the real MVP

@amit
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amit commented Oct 5, 2022

This is broken for rails 7.x because ActiveRecord::Base.connection_config interface is now changed. Here is a link to my gist which handles newer rails interface:

https://gist.github.com/amit/45e750edde94b70431f5d42caadee423

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