Task 5 - column or table exists

README.md

@@ -69,3 +69,13 @@ Test method `test_delete_parent_child_record()`.
 
 ---
 
+## Task 5. Check if Table/Column Exists
+
+Folder `database/migrations/task5` contains migrations for users table. By mistake, some developer tries to add the column that already exists, and re-create the users table that already exists.
+
+You need to modify the migrations to ignore those operations if the column/table exists. So "php artisan migrate" should run successfully, without errors.
+
+Test method `test_repeating_column_table()`.
+
+---
+

database/migrations/task5/2021_11_09_083051_create_users_table.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateUsersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('users', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->string('email')->unique();
+            $table->timestamp('email_verified_at')->nullable();
+            $table->string('password');
+            $table->rememberToken();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('users');
+    }
+}

database/migrations/task5/2021_11_09_083121_update_users_table.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class UpdateUsersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // TASK: add an if-statement in this file to NOT add column if it already exists
+        Schema::table('users', function (Blueprint $table) {
+            $table->string('name');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        //
+    }
+}

database/migrations/task5/2021_11_09_083225_recreate_users_table.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class RecreateUsersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // TASK: add an if-statement in this file to NOT create table if it already exists
+        Schema::create('users', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->string('email')->unique();
+            $table->timestamp('email_verified_at')->nullable();
+            $table->string('password');
+            $table->rememberToken();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        //
+    }
+}

tests/Feature/MigrationsTest.php

@@ -40,7 +40,6 @@ class MigrationsTest extends TestCase
         }
 
         $this->assertEquals(3, $fieldNumber);
-
     }
 
     public function test_soft_deletes()
@@ -65,4 +64,12 @@ class MigrationsTest extends TestCase
         Product::factory()->create();
         $category->delete();
     }
+
+    public function test_repeating_column_table()
+    {
+        // We just test if the migration succeeds or throws an exception
+        $this->expectNotToPerformAssertions();
+
+        Artisan::call('migrate:fresh', ['--path' => '/database/migrations/task5']);
+    }
 }