laravel 之 Eloquent 模型修改器和序列化

修改器

获取

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model {    public function getFirstNameAttribute($value) {        return ucfirst($value);    }}

使用 Laravel 加密器 来加密一个被保存在数据库中的值，当你从 Eloquent 模型访问该属性时该值将被自动解密。

$user = App\User::find(1);$firstName = $user->first_name;

修改

public function setFirstNameAttribute ($value) {    $this->attributes['first_name'] = strtolower($value);}

$user = App\User::find(1);$user->first_name = 'Sally';

日期转化器

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model{    protected $dates = [        'created_at',        'updated_at',        'deleted_at'    ];}

$user = App\User::find(1);$user->deleted_at = Carbon::now();$user->save();

可在属性上使用任何 Carbon 方法：

$user = App\User::find(1);echo $user->deleted_at->getTimestamp();

设置时间格式

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class Flight extends Model {    protected $dateFormat = 'U';}

属性类型转化

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model {    protected $casts = [        'is_admin' => 'boolean',    ];}

现在当你访问 is_admin 属性时，它将会被转换成布尔值，即便保存在数据库里的值是一个整数：

$user = App\User::find(1);if ($user->is_admin) {    //}

支持的转换的类型有：

• integer
• real
• float
• double
• string
• boolean
• object
• array
• collection
• date
• datetime
• timestamp

#   protected $casts = [#        'options' => 'array',#   ];$user = App\User::find(1);$options = $user->options;$options['key'] = 'value';$user->options = $options;$user->save();

序列化模型或集合

序列化成数组

$user = App\User::with('roles')->first();return $user->toArray();

序列化成 JSON

$user = App\User::find(1);return $user->toJson();// 或者return (string) $user; // 自动调用 toJson// 或者return App\User::all();

隐藏来自 json 的属性

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model {    protected $hidden = ['password'];}

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model {    protected $visible = ['first_name', 'last_name'];}

临时隐藏

return $user->makeVisible('attribute')->toArray();return $user->makeHidden('attribute')->toArray();

添加参数到 json 中

<?phpnamespace App;use Illuminate\Database\Eloquent\Model;class User extends Model {    protected $appends = ['is_admin'];}

# 在 appends 数组中的属性也遵循模型中 visible 和 hidden 设置public function getIsAdminAttribute() {    return $this->attributes['is_admin'] == 'yes';}