Раскрывающийся список с множественным выбором с отношением "многие ко многим"

Question

В моем проекте laravel я создал три таблицы как employee , team и employee_teams . В таблицах «employee_teams» есть отношения «многие ко многим» с внешними ключами employee_id и team_id.

структура базы данных таблицы «employee_teams»

id | employee_id | team_id

В форме «Сотрудник» есть раскрывающийся список с множественным выбором, который помогает назначить несколько команд для конкретного сотрудника.

<select name="namedropdown[]" id="namedropdown" class="selectpicker" multiple data-live-search="true">
    <option value="" disabled selected>Nothing selected</option>
         @foreach ($tdropdown as $key => $tdrop)
         <option value="{{$key}}">{{$tdrop}}</option>
         @endforeach
</select>

Я хочу сохранить "team_id" и "employee_id" в таблицу "employee_teams" .

Вот модель сотрудника

class employee extends Model
{  
    public function teams()
    {
         return $this->belongsToMany(team::class, 'employee_teams');
    }
}

Вот модель команды

class team extends Model
{
    public function employees()
    {
         return $this->belongsToMany(employee::class, 'employee_teams');
    }
}

Вот employee_team перенос таблицы

class CreateEmployeeTeamsTable extends Migration
{
    public function up()
    {
        Schema::create('employee_teams', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('employee_id')->unsigned();
            $table->integer('team_id')->unsigned();
            $table->foreign('employee_id')->references('id')->on('employees')->onDelete('cascade');
            $table->foreign('team_id')->references('id')->on('teams')->onDelete('cascade');
            $table->timestamps();
        });
    }

Вот функция сохранения в контроллере сотрудников

use App\employee;
use App\team;
use App\employee_team;

// codes

 $employee = new employee();

       $employee->namedropdown = implode(',', $request->input('namedropdown')); //Already save multi-select dropdown ids to the database 

       $employee->save();

 $employee_team = new employee_team();

      $employee->teams()->attach($employee->namedropdown);

      return redirect()->route('employee.index')->with('success','Data Added');
}

Ошибка появляется как SQLSTATE[01000]: Warning: 1265 Data truncated for column 'team_id' at row 1

Пожалуйста, помогите мне сохранить employee_id и team_id в " employee_teams "таблица. Большое вам спасибо.

Answer 1

Рабочий образец (протестирован):

Миграция: 2020_06_16_000000_create_employees_table. php

class CreateEmployeesTable extends Migration
{

    public function up()
    {
        Schema::create('employees', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('employees');
    }
}

Миграция: 2020_06_16_000000_create_teams_table. php

class CreateTeamsTable extends Migration
{
    public function up()
    {
        Schema::create('teams', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('teams');
    }
}

Миграция: 2020_06_16_000000_create_employee_team_table. php

class CreateEmployeeTeamTable extends Migration
{
    public function up()
    {
        Schema::create('employee_team', function (Blueprint $table) {
            $table->id();
            $table->unsignedBigInteger('employee_id')->nullable();
            $table->foreign('employee_id')->references('id')->on('employees')->onDelete('cascade');
            $table->unsignedBigInteger('team_id')->nullable();
            $table->foreign('team_id')->references('id')->on('teams')->onDelete('cascade');
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('employee_team');
    }
}

Модель: Сотрудник. php

class Employee extends Model
{    
    public function teams()
    {
        return $this->belongsToMany('App\Team');
    }
}

Модель: Team. php

class Team extends Model
{    
    public function employees()
    {
        return $this->belongsToMany('App\Employee');
    }
}

Маршруты: routes / web. php:

Route::get('/select_team/{id?}', 'EmployeeController@select_team')->name('employee.select_team');
Route::post('/save_teams/{id?}', 'EmployeeController@save_teams')->name('employee.save_teams');

Контроллер: EmployeeController. php

use Illuminate\Http\Request;
use App\Team;
use App\Employee;

class EmployeeController extends Controller
{
    public function select_team($employee_id){    
        return view('select_team', ['tdropdown'=>Team::all(), 'employee'=>Employee::find($employee_id)]);
    }

    public function save_teams(Request $request, $employee_id){   
        $employee = Employee::find($employee_id);
        foreach ($request->namedropdown as $team_id){
            $employee->teams()->attach($team_id);
        }

        return redirect()->route('employee.index')->with('success','Data Added');
    }
}

Blade: select_team.blade. php

<!DOCTYPE html>
<form action="/save_teams/{{$employee->id}}" method="post">
        @csrf
    <select name="namedropdown[]" id="namedropdown" class="selectpicker" multiple data-live-search="true">
    <option value="" disabled selected>Nothing selected</option>
            @foreach ($tdropdown as $tdrop)
            <option value="{{$tdrop->id}}">{{$tdrop->name}}</option>
            @endforeach
    </select>
    <button>Submit</button>
</form>
</html>

Думаю, это хороший пример, который может дать вам представление.