Redmine

Redmine provides redmine_plugin_model generator. It's similar to model generator by Rails but for Redmine plugin. It's useful to add a new model to Redmine plugin.

But Redmine doesn't provide redmine_plugin_migration generator. It's similar to migration generator by Rails but for Redmine plugin. It's useful to improve existing models in Redmine plugin.

We need to create a migration file for Redmine plugin by hand without redmine_plugin_migration.

The attached patch implements redmine_plugin_migration generator. It only has the minimal features:

• Assign a new migration version.
• Just create a migration file that only has empty change method.

The migration generator by Rails has more features:

• Intelligent migration content generator. For example it can generate a migration content for creating a table from create_TABLE_NAME migration name: https://github.com/rails/rails/blob/master/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb#L39-L41
• Migration name validation: https://github.com/rails/rails/blob/master/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb#L65-L69
• Accept more options. For example, attributes are accepted: https://github.com/rails/rails/blob/master/activerecord/lib/rails/generators/active_record/migration/migration_generator.rb#L8

I think that minimum implementation is a good starting point.

This implementation uses the framework for migration provided by Rails: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/migration.rb