Migrations are a really useful tool to keep the database structure in sync with all environments and for all team members. And whenever we generate a new migration - its filename has a pattern of date_time_name.php. But what if you need to add a table which was in the database long time ago and created manually? How to add it into migrations folder and specify its time in the past?
Actually, Artisan command make:migration does the only thing - generates the file. But that file can be generated manually without terminal or command prompt.
So let's try it. Let's assume the situation that we have a fresh Laravel installation and already have run default migrations for Auth tables - so our migrations table looks like this:
Now let's just open a default Laravel migration file 2014_10_12_000000_create_users_table.php and rename it to a month earlier and a table categories. Don't forget to rename a classname too, here's how new file 2014_09_12_000000_create_categories_table.php looks:
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateCategoriesTable extends Migration
{
/**
* Run the migrations.
*
* @return void
*/
public function up()
{
Schema::create('categories', function (Blueprint $table) {
$table->increments('id');
$table->string('name');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* @return void
*/
public function down()
{
Schema::drop('categories');
}
}
So now we have three files in migrations folder.
Now, let's run artisan migrate. What do you think will happen? Will it fail? Will it generate the table? Here's the result:
As you can see, it all went ok. Migration file launched successfully - here's the updated migrations table:
So there's a new batch created - that's it. Actually, Laravel doesn't really care about migration file names, it just checks the whole folder and runs all the files that are not present in migrations table. That date-time prefix in filenames is just a helping hand for developers to remember when it was actually done. So if you need to add past migration with a different date than today - as you can see, there's no problem.
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