php - Use one Laravel migrations table per database

Question

I work in a project that uses multiple databases. It seems like Laravel only uses the migrations-table in the database that is set as default. I would like one migrations table per database that logs the migrations that have been done to that specific database. Is this possible?

I have defined the databases in the config like this:

'connections' => [
    'db1' => array(
        'driver'    => 'mysql',
        'host'      => 'db1.host',
        'database'  => 'db1',
        'username'  => 'username',
        'password'  => 'password',
    ),
    'db2' => [
        'driver'    => 'mysql',
        'host'      => 'db2.host',
        'database'  => 'db2',
        'username'  => 'username',
        'password'  => 'password',
    ]
],

I also made the first database (db1) the default one

'default' => 'db1'

I install the migrations table on both databases

artisan migrate:install --database=db1
artisan migrate:install --database=db2

After that i proceed to create a couple of database specifc migrations

Create table test1 in db1 database:

use IlluminateDatabaseSchemaBlueprint;
use IlluminateDatabaseMigrationsMigration;

class CreateTest1Table extends Migration
{
    public function up()
    {
        Schema::connection('db1')->create('test1', function(Blueprint $table)
        {
            $table->increments('id')->unsigned();
        });
    }

    public function down()
    {
        Schema::connection('db1')->drop('test1');
    }
}

Create table test2 in db2 database:

use IlluminateDatabaseSchemaBlueprint;
use IlluminateDatabaseMigrationsMigration;

class CreateTest2Table extends Migration
{
    public function up()
    {
        Schema::connection('db2')->create('test2', function(Blueprint $table)
        {
            $table->increments('id')->unsigned();
        });
    }

    public function down()
    {
        Schema::connection('db2')->drop('test2');
    }
}

I now run the migrations

artisan migrate

Expected outcome

db1.migrations

+-----------------------------+-------+
| migration                   | batch |
+-----------------------------+-------+
| create_test1_table_in_db1   |     1 |
+-----------------------------+-------+

db2.migrations

+-----------------------------+-------+
| migration                   | batch |
+-----------------------------+-------+
| create_test2_table_in_db2   |     1 |
+-----------------------------+-------+

Actual outcome

db1.migrations

+-----------------------------+-------+
| migration                   | batch |
+-----------------------------+-------+
| create_test1_table_in_db1   |     1 |
| create_test2_table_in_db2   |     1 |
+-----------------------------+-------+

db2.migrations

+-----------------------------+-------+
| migration                   | batch |
+-----------------------------+-------+
Empty set

Answer 1

Use the --database parameter with the migrate command and store the migrations for each database in separate directories.

You could have separate directories in app/database/migrations for each of your database (in your case db1 and db2) and store the appropriate migrations in each directory. Then you could run the migrations like this:

artisan migrate --database="db1" --path="app/database/migrations/db1"
artisan migrate --database="db2" --path="app/database/migrations/db2"

This way your migrations table will be independent for each database.

If you want to go the extra mile and automate the process you could create your custom command that will run all the migrations at once. You can create the command like this (use make:console for Laravel 5.0 up to 5.2 or make:command for Laravel 5.2+):

artisan command:make MigrateAllCommand --command=migrate:all

This will create a new file app/commands/MigrateAllCommand.php. Your command's fire method would look something like this:

public function fire()
{
    foreach (Config::get('database.connections') as $name => $details)
    {
        $this->info('Running migration for "' . $name . '"');
        $this->call('migrate', array('--database' => $name, '--path' => 'app/database/migrations/' . $name));
    }
}

This will work provided the name of the database configuration key is the same as the migration directory name. You can then just call it like this:

artisan migrate:all

You can check the Laravel Command Docs for more info.