migration

migration er time ta important table relation ship er jonno

$table->unsignedBigInteger('writer_id');
$table->foreign('writer_id')->references('id')->on('writers');
OR
$table->foreignId('writer_id')->constrained();
          
$table->foreignId('devision_id')->constrained('devisions')->nullable();
$table->integer('quantity');
$table->integer('damage')->default(0)->nullable();
$table->boolean('status')->default(0)->nullable()->comment('Active or Inactive');
$table->decimal('amount',12,2)->nullable();
$table->enum('status',['active','inactive'])->default('inactive');
$table->float('discount');

$table->foreign('category_id')->references('id')->on('product_categories');
$table->foreign('category_id')->reference('id')->on('product_categories');
          
$table->id();                                                
$table->string('name',255)->nullable();
$table->string('email')->unique();
$table->text('description');
$table->integer('price')->default(100);
$table->float('amount', 8, 2);
$table->unsignedInteger('user_id');
$table->boolean('name');
$table->foreignId('user_id');
$table->ipAddress('visitor');
$table->macAddress('device');
$table->json('options');
$table->date('starting_date');
$table->dateTime('ending_date', $precision = 0);
$table->tinyInteger('votes');
$table->timestamps();
  
$table->foreign('user_id')->reference('id')->on('users')->onDelete('casecade');

$table->foreignId('user_id')->constrained()->onUpdate('cascade')->onDelete('cascade');

$table->foreign('user_id')->references('id')->on('users');
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/app/Providers/AppServiceProvider.php
          
use Illuminate\Support\Facades\Schema;
public function boot()
{
    Schema::defaultStringLength(191);
}