Question

我正在尝试使用观察者进行关系删除，但是问题是，当我在创建函数中的DD正常工作时，但是当我在删除函数中的DD却不显示任何东西时（POSTMAN）表示工作或错误均不相同

这里是Api：

$api->post('store','App\Http\Controllers\CustomerController@store');
$api->delete('delete/{id}','App\Http\Controllers\CustomerController@destroy');

这是工匠制作的观察者文件

namespace App\Observers;

use App\Customer;

class CustomerObserver
{
    public function created(Customer $customer)
    {
        dd($customer);  
    }

    public function deleted(Customer $customer)
    {
        dd($customer); 
    }
}

这是客户总监

class CustomerController extends Controller
{
    public function store(Request $request)
    {
        return Customer::store($request->person);
    }

    public function destroy($id)
    {
       $delete = Customer::where('person_id',$id);
       $delete->delete();
    }
}

这是客户模型文件。

class Customer extends Model
{
    //Relationship Start From Here
    public function person()
    {
        return $this->belongsTo(Person::class);
    }

    //End Here

    public static function store($request)
    {
        //Call to Person Model And Save User
        $user = Person::store($request);

        //Create object of Customer Model
        $customer = new Customer();
        $customer->fill($request['customers']);
        $customer->person()->associate($user)->save();

        //return customer 
        return $customer;
    }
}

Answer 1

我知道这可能是一个迟到的回复，并且不确定您是否还在寻找答案。我认为问题在于您如何删除 Customer 模型。

当你做类似的事情时

$delete = Customer::where('person_id',$id);
$delete->delete();

您正在执行批量删除语句。如 laravel document 中所述，mass deletes will not fire any model events for the models that are deleted 这就是您的 deleted 观察者事件没有触发的原因。

<块引用>

通过 Eloquent 执行批量删除语句时，不会为已删除的模型触发删除和删除模型事件。这是因为在执行删除语句时实际上从未检索到模型

现在看看如何创建 Customer。您一次创建一个模型。因此，您的 created 观察者确实可以运行。

//Create object of Customer Model
$customer = new Customer();
$customer->fill($request['customers']);
$customer->person()->associate($user)->save();

解决你的问题，最简单的方法就是把所有的模型都找回来，一一删除，这样你就可以触发事件了。

foreach (Customer::where('person_id',$id)->get() as $delete) {
   $delete->delete();
}

Answer 2

你能做所有事情吗

在#include <iostream> #include <string> #include <vector> using namespace std; class rolodex { string name; string street, town, state; string zip; string phone; vector <rolodex> entries; public: rolodex(); void getmenu(); void add_entry(); void set_name(); void set_address(); void set_phone(); void printinfo(); }; rolodex :: rolodex() : name(""), street(""), town(""), state(""), zip(""), phone(""), entries() { } void rolodex :: getmenu() { cout << "\n\n1)Add Entry"; cout << "\n5)Print All Entries"; cout << "\n6)Exit" << endl; } void rolodex :: add_entry() { rolodex temp; cout << "\n\nEnter Name: "; temp.set_name(); temp.set_address(); cout << "\n\nEnter Your Phone Number: "; temp.set_phone(); entries.push_back(temp); } void rolodex :: set_name() { cin.ignore(); getline(cin, name); } void rolodex :: set_address() { cout << "\n\nNow we'll enter address information."; cout << "\n\nStreet: "; getline(cin, street); cout << "\n\nTown: "; getline(cin, town); cout << "\n\nState: "; getline(cin, state); cout << "\n\nZip: "; getline(cin, zip); } void rolodex :: set_phone() { getline(cin, phone); } void rolodex :: printinfo() { for(unsigned int i = 0; i < entries.size(); i++) { cout << entries[i] << endl; //This is where I'm stuck since I've only //worked with vectors of non-object data //type } } int main() { rolodex person, menu; short choice; bool done = false; do { menu.getmenu(); cout << "\n\nEnter a choice: "; cin >> choice; switch(choice) { case 1: person.add_entry(); break; case 5: person.printinfo(); break; case 6: done = true; break; default: cout << "\n\nInvalid Entry." << endl << endl; } } while(!done && isdigit(choice)); return 0; }方法的CustomerServiceProvider中的Customer::observe(CustomerObserver::class);中添加1行

在提供程序数组的app.php文件中添加boot
CustomerServiceProvider
composer dump-autoload

Answer 3

我也遇到这个问题，但是我从存储库中调用delete方法，这阻止了Observer的delete事件被触发。当我从模式使用删除功能时，它可以正常工作。

Laravel Observer创建有效但删除无效

3 个答案: