Laravel中10个有用的用法小结

User::find(1, ['name', 'email']);
User::findOrFail(1, ['name', 'email']);

$user = User::find(1);
$newUser = $user- replicate();
$newUser- save();

$user = User::find(1);
$sameUser = User::find(1);
$diffUser = User::find(2);
$user- is($sameUser); // true
$user- is($diffUser); // false;

$user = User::find(1);
$user- name; // 'Peter'
// 如果 name 更新过，比如由 peter 更新为 John
$user- refresh();
$user- name; // John

$user = App\User::first();
$user- name;    // John
//
$updatedUser = $user- fresh(); 
$updatedUser- name;  // Peter
$user- name;    // John

class User extends Model
{
 public function phone()
 {
  return $this- hasOne('App\Phone');
 }
}
$user = User::first();
$user- name = "Peter";
$user- phone- number = '1234567890';
$user- save(); // 只更新 User Model
$user- push(); // 更新 User 和 Phone Model

class User extends Model
{
 use SoftDeletes;
  * deleted_at 字段.
  *
  * @var string
  */
 const DELETED_AT = 'is_deleted';
}

class User extends Model
{
 use SoftDeletes;
 
 public function getDeletedAtColumn(){
  return 'is_deleted';
 }
}

$user = User::first();
$user- name; // John
$user- name = 'Peter';
$user- save();

dd($user- getChanges());
// 输出：
[
 'name' =  'John',
 'updated_at' =  '...'
]

$user = User::first();
$user- name;    // John
$user- isDirty();  // false 
$user- name = 'Peter'; 
$user- isDirty();  // true
$user- getDirty();  // ['name' =  'Peter']
$user- save();   
$user- isDirty();  // false

$user = App\User::first();
$user- name;     //John
$user- name = "Peter";   //Peter
$user- getOriginal('name'); //John
$user- getOriginal();   //Original $user record