I had a similar task at hand when Lumen / Laravel started using Passport and I had to ditch the previous oauth server implementation from lucadegasperi/oauth2-server-laravel.
I finally managed to get things going by creating 2 migrations, where the first one clears foreign keys and the second one actually deletes the tables.
I had to use dates before the migrations of Laravel’s Passport (2016-06-01) so they will be executed before those.
2016_05_31_000000_clear_old_oauth_relations.php
//...
class ClearOldOauthRelations extends Migration
{
public function up()
{
Schema::disableForeignKeyConstraints();
// drop foreign keys
Schema::table('oauth_access_tokens', function (BluePrint $table) {
$table->dropForeign('oauth_access_tokens_session_id_foreign');
});
//...
Schema::enableForeignKeyConstraints();
}
//...
}
And in the second file
2016_05_31_000001_clear_old_oauth.php
//...
public function up()
{
Schema::disableForeignKeyConstraints();
Schema::drop('oauth_access_tokens');
//...
Schema::enableForeignKeyConstraints();
}
//...