Common interface for data migration

0.7.0 2019-06-25 15:11 UTC

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Last update: 2020-07-25 17:53:48 UTC


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Soong is a framework for building robust Extract-Transform-Load (ETL) applications for performing data migration. It is designed to be record-oriented and configuration-driven - most applications will require little or no custom PHP code, and tools can easily customize (or create) data migration processes implemented by Soong.

Documentation is at

This project adheres to Semantic Versioning. For major version 0, we will increment the minor version for backward-incompatible changes. At this pre-release point, the interfaces are still changing regularly - if you develop any applications using Soong be sure to pin them to the minor release.

Right now soong/soong is standalone, containing all components developed for soong so far as well as sample migrations (see Demos below). Once the interfaces are stable, the plan is to break out component implementations into separate smaller libraries - soong/soong itself may end up containing only the interfaces (contracts), or (more likely) also basic implementations for the most widely-needed components. Certainly, specialized components like the DBAL integration will end up in their own repos.


Soong is best installed using Composer. Since as noted above while in major version 0 minor versions will contain backward-incompatible changes, and at this point the interfaces are still changing regularly, if you develop any applications using Soong be sure to pin them to the minor release you implemented them with. E.g., "~0.5.0" which will get the latest release with major.minor version 0.5 and prevent updating to a 0.6.x release which may break your application.

$ composer require soong/soong "~0.5.0"

Change log

Please see CHANGELOG for more information on what has changed recently.


There's still a lot of refinement to be done to Soong - this is your opportunity to get involved with a new framework (and community) on the ground floor! As mentioned above, the plan is ultimately to break out components into small well-contained libraries - these will be excellent opportunities to get your feet wet maintaining your own open-source project.

Please see CONTRIBUTING and CODE_OF_CONDUCT for details.


If you discover any security related issues, please email instead of using the issue tracker.


To setup for demoing Soong ETL:

  1. Create an empty database for testing.
  2. Import data/extractsource.sql to the database (table to be populated by the first demo).
  3. Import data/beer.sql to the database (tables to be populated for the second demo).
  4. Edit each of the files in config/ - where indicated, replace the sample credentials with those for the test database.

Demo 1:

  1. Execute bin/soong migrate arraytosql
  2. Look at the extractsource table to see the data populated, and that the ids have been assigned consecutively.
  3. Look at the map_arraytosql table to see the mapping from source to destination keys.
  4. Execute bin/soong migrate sqltocsv
  5. Observe CSV data output to the terminal with configured transformations applied.
  6. Execute bin/soong rollback arraytosql
  7. Observe that the extractsource and map_arraytosql tables are now empty.

Demo 2:

  1. Execute bin/soong migrate beertopics
  2. Observe the beer_terms table is populated from CSV data - in particular, see how the 'red ale' reference to its 'ale' parent has been converted to the numeric ID assigned to the 'ale' row in the database.
  3. Execute bin/soong migrate beeraccounts
  4. Observe the beer_users table - in particular, see how the ValueLookup transformer converted the boolean values in the pro column to strings in the taster column.
  5. Execute bin/soong migrate beercontent
  6. Observe the beer table - in particular, see how the relationships to users/accounts was maintained even though the IDs for the users changed (also see the map_beeraccounts table).
  7. Execute bin/soong rollback beercontent
  8. Observe how the beer and map_beercontent tables are now empty.



The MIT License (MIT). Please see License File for more information.