# Laravel Factory 使用 faker
###### tags: Laravel

原本規劃收件地址 (UserAddress) 的 Migration 中縣市跟區是分兩個欄位 (city, district)

    public function up()
    {
        Schema::create('user_addresses', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->constrained()->onDelete('cascade');
            $table->string('city');
            $table->string('district');
            $table->string('address');
            $table->unsignedInteger('zip');
            $table->string('contact_name');
            $table->string('contact_phone');
            $table->dateTime('last_used_at')->nullable();
            $table->timestamps();
        });
    }

但是產生中文假資料得參考 [`zh_TW` 版本](https://github.com/FakerPHP/Faker/tree/main/src/Faker/Provider/zh_TW) 的規劃，當中沒有 `district` 而是把縣市跟區都放在 `city` 中，如下圖所示：

所以就要把 migration 中 `district` 欄位去除掉，只留下 `city` ，但經過產生假資料測試後發現偶爾會出錯，原來是跟郵遞區號(zip)有關，原因是 `zh_TW` 版本 faker 產生的 postcode 有兩種 `protected static $postcode = array('###-##', '###');` 所以 migration 中 `zip` 格式使用 `unsignedInteger` 是行不通的，後來就改成 `string` ，新的 migration 如下所示：

    public function up()
    {
        Schema::create('user_addresses', function (Blueprint $table) {
            $table->id();
            $table->foreignId('user_id')->constrained()->onDelete('cascade');
            $table->string('city');
            $table->string('address');
            $table->string('zip');
            $table->string('contact_name');
            $table->string('contact_phone');
            $table->dateTime('last_used_at')->nullable();
            $table->timestamps();
        });
    }

*UserAddressFactory.php*

public function definition()
    {
        return [
            'city' => $this->faker->city,
            'address' => $this->faker->streetAddress,
            'zip' => $this->faker->postcode,
            'contact_name' => $this->faker->name,
            'contact_phone' => $this->faker->phoneNumber,
        ];
    }

在 `tinker` 中使用 `UserAddress::factory()->count(3)->create(['user_id' => 1]);` 即可製造 3 筆 user_id = 1 的 UserAddress 資料，**但前提是 Models 需要先有關聯！**

>>> UserAddress::factory()->count(3)->create(['user_id' => 1]);
[!] Aliasing 'UserAddress' to 'App\Models\UserAddress' for this Tinker session.
=> Illuminate\Database\Eloquent\Collection {#3306
     all: [
       App\Models\UserAddress {#3310
         city: "新竹縣芎林鄉",
         address: "南勢坑路二段402號13樓",
         zip: "642",
         contact_name: "長孫承哲",
         contact_phone: "[phone]",
         user_id: 1,
         updated_at: "2020-11-04 15:37:45",
         created_at: "2020-11-04 15:37:45",
         id: 2,
       },
       App\Models\UserAddress {#3311
         city: "高雄市桃源區",
         address: "勝利七街二段200號",
         zip: "873",
         contact_name: "尉遲郁",
         contact_phone: "[phone]",
         user_id: 1,
         updated_at: "2020-11-04 15:37:45",
         created_at: "2020-11-04 15:37:45",
         id: 3,
       },
       App\Models\UserAddress {#3312
         city: "嘉義市東區",
         address: "鎮新五路八段240巷910弄343號22樓",
         zip: "114-46",
         contact_name: "金馨庭",
         contact_phone: "[phone]",
         user_id: 1,
         updated_at: "2020-11-04 15:37:45",
         created_at: "2020-11-04 15:37:45",
         id: 4,
       },
     ],
   }


###### tags: `Laravel`