laravel migration constraints code example

Example 1: create laravel migration

php artisan make:migration create_users_table

Example 2: laravel migration foreign key 5.6

Schema::table('posts', function (Blueprint $table) {
    $table->unsignedInteger('user_id');

    $table->foreign('user_id')->references('id')->on('users');
});

Example 3: laravel migration integer

$table->bigInteger('votes');

Example 4: migrations required field laravel

$table->string('foo')->nullable(false)->change();