克隆一个包含所有关系的 Eloquent 对象? [英] Clone an Eloquent object including all relationships?
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问题描述
有什么方法可以轻松地克隆一个 Eloquent 对象,包括它的所有关系?
Is there any way to easily clone an Eloquent object, including all of its relationships?
例如,如果我有这些表:
For example, if I had these tables:
users ( id, name, email )
roles ( id, name )
user_roles ( user_id, role_id )
除了在users
表中新建一行,除了id
之外的所有列都相同,还应该在中新建一行user_roles
表,为新用户分配相同的角色.
In addition to creating a new row in the users
table, with all columns being the same except id
, it should also create a new row in the user_roles
table, assigning the same role to the new user.
像这样:
$user = User::find(1);
$new_user = $user->clone();
用户模型在哪里
class User extends Eloquent {
public function roles() {
return $this->hasMany('Role', 'user_roles');
}
}
推荐答案
在 laravel 4.2 中测试了belongsToMany 关系
tested in laravel 4.2 for belongsToMany relationships
如果您在模型中:
//copy attributes
$new = $this->replicate();
//save model before you recreate relations (so it has an id)
$new->push();
//reset relations on EXISTING MODEL (this way you can control which ones will be loaded
$this->relations = [];
//load relations on EXISTING MODEL
$this->load('relation1','relation2');
//re-sync everything
foreach ($this->relations as $relationName => $values){
$new->{$relationName}()->sync($values);
}
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