Creating a migration with a vector field when using pgvector and Postgres

To create a migration with a vector field when using pgvector and Postgres, you can use the DB::statement() method to execute raw SQL queries in your migration. Here's an example migration that creates a users table with a vector field:

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

class CreateUsersTable extends Migration
{
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->string('email')->unique();
            $table->vector('embeddings')->nullable();
            $table->timestamps();
        });

        DB::statement('CREATE INDEX users_embeddings_index ON users USING gist(embeddings)');
    }

    public function down()
    {
        Schema::dropIfExists('users');
    }
}

Note that we're using the vector() method to define the embeddings field, which is not a standard field type for Laravel migrations. We're also creating a GIST index on the embeddings field using the DB::statement() method.

Hope this helps!