Getting started with version sources

A version source is a file that holds version information for the database. It basically is a template for the database. The version source is a JSON tree. In the root we supply an engine, name, and version. The engine selects the database engine syntax AlphaDB should use. Supported values are postgres and mysql; see Database engines for how the syntax differs per engine. The name is used to prevent the use of multiple version sources on one database. version is an array of versions AlphaDB will walk over when updating the database.

In the root, a version source should look like this.

{
  "engine": "postgres",
  "name": "template-name",
  "version": [
    ...
  ]
}

Why JSON?

The main motivation behind the choice to go with JSON is compatibility with NoSQL databases. Projects like MongoDB  and Firestore  can store this structure very easily. With the use of these databases, it’s really easy to distribute new version data over the internet.