id(); $table->string('title', 200); $table->text('content'); $table->foreignId('department_id')->nullable()->constrained()->nullOnDelete(); $table->integer('enrollment_year')->nullable(); $table->foreignId('created_by')->nullable()->constrained('users')->nullOnDelete(); $table->timestamps(); $table->softDeletes(); }); } public function down(): void { Schema::dropIfExists('announcements'); } };