coursework tasks 1 to 10

database/migrations/2026_01_07_140000_create_bookings_table.php

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+<?php
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up() {
+        Schema::create('bookings', function (Blueprint $table) {
+            $table->id();
+            $table->string('bookingnumber'); 
+            $table->unsignedBigInteger('client_id');
+            $table->unsignedBigInteger('employee_id'); 
+            $table->unsignedBigInteger('service_id');
+            $table->date('bookingdate');
+            $table->time('starttime');
+            $table->time('endtime');
+            $table->enum('status', ['confirmed', 'cancelled', 'completed'])->default('confirmed');
+            $table->enum('cancelledby', ['client', 'admin'])->nullable();
+            $table->text('cancelreason')->nullable();
+            $table->timestamps();
+            
+            // Внешние ключи
+            $table->foreign('client_id')->references('id')->on('users');
+            $table->foreign('employee_id')->references('id')->on('users'); 
+            $table->foreign('service_id')->references('id')->on('services');
+            
+            // УНИКАЛЬНЫЙ ИНДЕКС 
+            $table->unique(['employee_id', 'bookingdate', 'starttime'], 'unique_booking_slot');
+        });
+    }
+    
+    public function down() {
+        Schema::dropIfExists('bookings');
+    }
+};