refactored migrate command to handle multiple migrations paths

[schmunk42]

added migrationLookup property
fixes #384

[schmunk42]

Note: Had to add alias to the migration table

[adamaltman]

Does this change affect the contents of the guide here: https://github.com/yiisoft/yii2/blob/master/docs/guide/console-migrate.md#use-command-line-options

If so, can you also adjust the guide too?

[qiangxue]

I don't think we need the alias column. For issue #384, we only need to support setting migrationPath as an array which represents a list of search paths for migration classes.

[schmunk42]

@qiangxue But the migrationPath is currently also used as the place to generate migrations. If we've an array here, how should we deal with this, maybe adding generateMigrationPath as an option?

@adamaltman Thanks for noticing. I'll update the guide when we've finished the implementation.

[qiangxue]

When generating a migration, if there are multiple migrationPath, the user is required to enter a full path of the migration name.

[qiangxue]

or perhaps he just needs to configure migrationPath to a single path when creating a new migration.

[schmunk42]

I also think that would be the best option, but then in conjunction with Application::extensions where an extension could add a migration like so (in its bootstrap method):

$app->addMigrationPath('@vendor/myns/package/migrations');

Or should we specify this in the extras of the composer.json file?

Am I right, that there's no representation of @vendor/yiisoft/extensions.php yet or is Application::extensions NOT linked to that?

The migrate command would then merge the migration paths from Application::extensions and migrationPath from the command.

[schmunk42]

Broken code, too many changes.

[schmunk42]

Made this available as an extension: https://github.com/dmstr/yii2-migrate-command

[jacmoe]

I really want this to be in Yii 2 - I do understand that this would break existing migration dbs, but I see no reason why it can't be implemented for fresh migrations?
This extension is one I always install - it enables me to take back control of migrations, whether or not they be mine or from third-party Yii extensions.
Excellent work @schmunk42 👍

[schmunk42]

🙇 @jacmoe :)

[cebe]

This extension is one I always install

same here.

@jacmoe the issue #384 is still open. One day I will take the time to include it in the framework.

[jacmoe]

Music in my ears @cebe 👍

[schmunk42]

@cebe Here's a PR dmstr/yii2-migrate-command#9 which is based more on the current Yii 2.0 code. From my side, feel free to move the stuff to the core or contact me if you like...