laravel foreign key on delete set null code example

Example 1: laravel migration on delete set null

$table->...->onDelete('set null');

Example 2: set null on foreign key deletion in laravel

$table->foreignId('forign_id')->nullable()->constrained("table_name")->cascadeOnUpdate()->nullOnDelete();

Example 3: laravel 7 eloquent on delete set null schema

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