Challenge 1: Create a Model and Migration — Possible Solution
====================================================================

# php artisan make:model Author -m
# Model created successfully.
# Created Migration: 2026_07_05_130000_create_authors_table.php

// database/migrations/2026_07_05_130000_create_authors_table.php

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

return new class extends Migration {
    public function up(): void
    {
        Schema::create('authors', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->text('bio')->nullable();
            $table->timestamps();
        });
    }

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

// app/Models/Author.php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Author extends Model
{
    protected $fillable = ['name', 'bio'];
}

# Don't forget to actually apply it:
#   php artisan migrate

WHY THIS WORKS
--------------
- $table->id() adds the auto-incrementing primary key column — the
  Eloquent equivalent of Django's implicit id field, generated
  automatically unless a different primary key is configured.
- $table->text('bio')->nullable() marks bio as an optional field at the
  database level — without ->nullable(), the column would be NOT NULL by
  default and every Author would require a bio to be saved at all.
- $table->timestamps() adds created_at and updated_at columns that
  Eloquent manages automatically on every save — a convenience with no
  direct one-line Django equivalent (Django would need auto_now_add/
  auto_now set explicitly on two separate fields).
- down() calls Schema::dropIfExists('authors') — the exact reverse of
  up()'s Schema::create('authors', ...) — written by hand here, unlike
  Django where this reverse operation is generated automatically from the
  model diff.
- $fillable = ['name', 'bio'] is the mass-assignment allowlist from this
  chapter, set up from the very first version of the model rather than
  added as an afterthought.