Task 4 - showing specific validation error

README.md

@@ -56,3 +56,11 @@ Test method `test_validation_errors_shown_in_blade()`.
 
 ---
 
+## Task 4. Showing a Specific Validation Error.
+
+In `resources/views/products/create.blade.php` file, show the validation error for `"name" => "required"`, using a specific Blade directive to show one specific error.
+
+Test method `test_validation_specific_error_shown_in_blade()`.
+
+---
+

app/Http/Controllers/ProductController.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Product;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Validator;
+
+class ProductController extends Controller
+{
+    public function create()
+    {
+        return view('products.create');
+    }
+
+    public function store(Request $request)
+    {
+        $validator = Validator::make($request->all(), [
+            'name' => 'required',
+        ]);
+
+        if ($validator->fails()) {
+            return redirect('products/create')
+                ->withErrors($validator);
+        }
+
+        Product::create($validator->validated());
+
+        return 'Success';
+    }
+}

app/Models/Product.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class Product extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['name'];
+}

database/migrations/2021_11_29_112611_create_products_table.php

@@ -0,0 +1,32 @@
+<?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()
+    {
+        Schema::create('products', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('products');
+    }
+}

resources/views/products/create.blade.php

@@ -0,0 +1,14 @@
+<form method="POST" action="{{ route('products.store') }}">
+    @csrf
+    Name:
+    <br />
+    <input type="text" name="name" />
+    <br />
+    {{-- TASK: show the validation error for the specific "name" field --}}
+    {{-- using one Blade directive: pseudo-code below --}}
+    {{-- @directive --}}
+    {{-- {{ $message }} --}}
+    {{-- @endDirective --}}
+    <br /><br />
+    <button type="submit">Save</button>
+</form>

routes/web.php

@@ -16,6 +16,7 @@ use Illuminate\Support\Facades\Route;
 Route::post('posts', [\App\Http\Controllers\PostController::class, 'store']);
 Route::post('profile', [\App\Http\Controllers\ProfileController::class, 'update'])->middleware('auth');
 Route::resource('projects', \App\Http\Controllers\ProjectController::class);
+Route::resource('products', \App\Http\Controllers\ProductController::class);
 
 Route::get('/', function () {
     return view('welcome');

tests/Feature/ValidationTest.php

@@ -51,4 +51,12 @@ class ValidationTest extends TestCase
         $response->assertSee('The name field is required.');
         $response->assertSee('The description field is required.');
     }
+
+    public function test_validation_specific_error_shown_in_blade()
+    {
+        // Post without name should fail
+        $response = $this->followingRedirects()->post('products');
+        $response->assertStatus(200);
+        $response->assertSee('The name field is required.');
+    }
 }