belongs to many laravel

1For example, a blog post may have an infinite number of comments. And a single
2comment belongs to only a single post  
3
4class Post extends Model
5{
6    public function comments()
7    {
8        return $this->hasMany('App\Models\Comment');
9    }
10}
11
12class Comment extends Model
13{
14    public function post()
15    {
16        return $this->belongsTo('App\Models\Post');
17    }
18}

1// Detach a single role from the user...
2$user->roles()->detach($roleId);
3
4// Detach all roles from the user...
5$user->roles()->detach();

1<?php
2
3namespace App\Models;
4
5use Illuminate\Database\Eloquent\Model;
6
7class Phone extends Model
8{
9    /**
10     * Get the user that owns the phone.
11     */
12    public function user()
13    {
14        return $this->belongsTo('App\Models\User');
15    }
16}

1use App\Models\User;
2
3$user = User::find(1);
4
5$user->roles()->attach($roleId);

1$movies = Movie::whereHas('director', function($q) {
2    $q->where('name', 'great');
3})->get();
4