Creating a joined table with laravel - sql

Question

I am using Laravel 6. I want to create a joined table named meeting_user that should connect the tables meetings and users. That's considering that a user could participate to many meetings and a meeting could have many users.
users:
Schema::create('users', function (Blueprint $table) {
$table->bigIncrements('id');
$table->string('name');
$table->string('surname');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->string('username')->unique();
$table->string('password');
$table->enum('permission', array(0, 1, 2));
$table->enum('is_active', array(0, 1))->default(1);
$table->rememberToken();
$table->timestamps();
});
meetings:
Schema::create('meetings', function (Blueprint $table) {
$table->bigIncrements('id');
$table->text('description');
$table->string('id_room');
$table->date('date');
$table->time('start_hour');
$table->time('end_hour');
$table->enum('is_active', array(0, 1))->default(1);;
$table->timestamps();
$table->foreign('id_room')->references('id')->on('rooms');
});
I would like to create this table with a migration and furthermore I would like that when a user creates a meeting with many users and so inserts a new row to the "meetings" table, even the new "meeting_user" table be dynamically filled in adding new rows. Is there a way to do that with Laravel?

Answer 1

you have to create a third table
called for example "user_meetings"
and it's migration will be
$table->unsignedBigInteger('user_id');
$table->unsignedBigInteger('meeting_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users')-
>onDelete('cascade');
$table->foreign('meeting_id')->references('id')->on('meetings')-
>onDelete('cascade');
and then put the relation in "user" model
public function meetings()
{
return $this->belongsToMany(Meeting::class, 'user_meetings', 'user_id', 'meeting_id');
}
and the relation in "meeting" model
public function users()
{
return $this->belongsToMany(User::class, 'user_meetings', 'meeting_id', 'user_id');
}
and the code of "adding" meetings in the controller will be
$user->meetings()->attach($request->meetings);
return redirect()->back()->with('success', 'successfull');
and "edit"
$checker->meetings()->sync($request->meetings);
return redirect()->back()->with('success', 'successfull');
and "delete"
$checker->meetings()->detach();
i hope these steps will help you