Gamma
Database Synchronizer. Transfer data from one database to another easily.
Installation
Add this line to your application's Gemfile:
gem 'gamma'And then execute:
$ bundle
Or install it yourself as:
$ gem install gamma
Usage
Dryrun
gamma dryrun --settings ./tmp/settings.yml --data ./tmp/data.yml
Apply
gamma apply --settings ./tmp/settings.yml --data ./tmp/data.yml
data.yml Example
- data:
table:
- "*"
table_without:
- "users"
- "schema_migrations"
- "ar_internal_metadata"
mode: "replace"
delta_column: "updated_at"
- data:
table: "users"
mode: "replace"
delta_column: "updated_at"
hooks:
- column:
name:
- "email"
scripts:
- "hooks/mask_email.rb"
- column:
name:
- "name"
scripts:
- "hooks/mask_name.rb"
- row:
scripts:
- "hooks/image.rb"
Hook Script Example
# $YourDir/hooks/mask_name.rb
class MaskName
def execute(apply, column, value)
value = "●●#{value[2..-1]}"
value
end
end
# $YourDir/hooks/image.rb
class Image
def execute(apply, record)
#
# Copy image data from one storage to another
#
record
end
end
settings.yml Example
in_database_config:
adapter: mysql2
encoding: utf8
database: real_database
pool: 5
host: localhost
username: root
password:
out_database_config:
adapter: mysql2
encoding: utf8
database: sync_to_database
pool: 5
host: localhost
username: root
password:
Development
After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/nishio-dens/gamma. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the Gamma project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.