Task 4 - Parent child delete

README.md

@@ -8,6 +8,15 @@ In the very beginning, if you run `php artisan test`, or `vendor/bin/phpunit`, a
 Your task is to make those tests pass.
 
 
+## IMPORTANT NOTICE - TESTING DATABASE IS MYSQL
+
+**TESTS ARE CONFIGURED TO RUN ON A LOCAL MYSQL DATABASE (NOT SQLITE) WHICH SHOULD BE CALLED "mysql_testing"**
+
+**DON'T FORGET TO CREATE THAT DATABASE**
+
+**ALSO, THAT DB WILL BE WIPED A LOT WITHIN TESTS BY "migrate:fresh"**
+
+
 ## How to Submit Your Solution
 
 If you want to submit your solution, you should make a Pull Request to the `main` branch.
@@ -52,3 +61,11 @@ Test method `test_soft_deletes()`.
 
 ---
 
+## Task 4. Auto-Delete Related Records
+
+Folder `database/migrations/task4` contains migrations for category and products tables. You need to modify the products migration, so that deleting the category would auto-delete its products, instead of throwing an error.
+
+Test method `test_delete_parent_child_record()`.
+
+---
+

app/Models/Category.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Category extends Model
+{
+    use HasFactory;
+}

app/Models/Product.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Product extends Model
+{
+    use HasFactory;
+}

database/factories/CategoryFactory.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+class CategoryFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array
+     */
+    public function definition()
+    {
+        return [
+            'name' => $this->faker->text(20),
+        ];
+    }
+}

database/factories/ProductFactory.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Database\Factories;
+
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+class ProductFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array
+     */
+    public function definition()
+    {
+        return [
+            'category_id' => 1,
+            'name' => $this->faker->text(20),
+        ];
+    }
+}

database/migrations/task4/2021_11_09_082155_create_categories_table.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateCategoriesTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('categories', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('categories');
+    }
+}

database/migrations/task4/2021_11_09_082205_create_products_table.php

@@ -0,0 +1,34 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateProductsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // TASK: Edit this file, so that deleting category would auto-delete its products
+        Schema::create('products', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('category_id')->constrained();
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('products');
+    }
+}

tests/Feature/MigrationsTest.php

@@ -2,6 +2,8 @@
 
 namespace Tests\Feature;
 
+use App\Models\Category;
+use App\Models\Product;
 use App\Models\Project;
 use App\Models\User;
 use Illuminate\Support\Facades\Artisan;
@@ -51,4 +53,16 @@ class MigrationsTest extends TestCase
         $project = Project::factory()->create();
         $project->delete();
     }
+
+    public function test_delete_parent_child_record()
+    {
+        // We just test if the test succeeds or throws an exception
+        $this->expectNotToPerformAssertions();
+
+        Artisan::call('migrate:fresh', ['--path' => '/database/migrations/task4']);
+
+        $category = Category::factory()->create();
+        Product::factory()->create();
+        $category->delete();
+    }
 }