Laravel relationship

WhereHas site:https://laravel.com/docs/

use Illuminate\Database\Eloquent\Builder;

// Retrieve posts with at least one comment containing words like code%...
$posts = Post::whereHas('comments', function (Builder $query) {
    $query->where('content', 'like', 'code%');
})->get();

// Retrieve posts with at least ten comments containing words like code%...
$posts = Post::whereHas('comments', function (Builder $query) {
    $query->where('content', 'like', 'code%');
}, '>=', 10)->get();

Source: laravel.com

Laravel where has

use Illuminate\Database\Eloquent\Builder;

// Retrieve posts with at least one comment containing words like foo%...
$posts = App\Post::whereHas('comments', function (Builder $query) {
    $query->where('content', 'like', 'foo%');
})->get();

// Retrieve posts with at least ten comments containing words like foo%...
$posts = App\Post::whereHas('comments', function (Builder $query) {
    $query->where('content', 'like', 'foo%');
}, '>=', 10)->get();

Source: laravel.com

How to use where relationship laravel

Event::with(["owner", "participants" => function($q) use($someId){
    $q->where('participants.IdUser', '=', 1);
    //$q->where('some other field', $someId);
}])

Source: stackoverflow.com

Associate laravel

When updating a belongsTo relationship, you may use the associate method. This 
method will set the foreign key on the child model:

	$account = App\Account::find(10);
	$user->account()->associate($account);
	$user->save();

When removing a belongsTo relationship, you may use the dissociate method. This
method will set the relationship foreign key to null:

	$user->account()->dissociate();
	$user->save();

Laravel relationship

$comment = Post::find(1)->comments()
                    ->where('title', 'foo')
                    ->first();

Source: laravel.com

Laravel relationship

$model->relation; // result of the relation, ie. null/model for x-1 relations or collection for x-m
$model->relation(); // relation object

Source: laracasts.com

Similar codes

0 vote113 views1 answer
Set config key dynamic laravel
PHP Laravel
32 votes120 views4 answers
Laravel seed fresh
PHP Laravel
0 vote122 views2 answers
Bigtext migration laravel
PHP Laravel
0 vote126 views1 answer
Laravel Filesystem chmod(): Operation not permitted
PHP Laravel
15 votes111 views4 answers
Change existing migration laravel
PHP Laravel
0 vote849 views1 answer
Updateorinsert laravel for large data
PHP Laravel
2 votes114 views1 answer
How send user to 404 page if not exist page in laravel
PHP Laravel
0 vote123 views1 answer
Laravel collection except
PHP Laravel
0 vote104 views1 answer
Laravel eloquent hasmany select
PHP Laravel
0 vote112 views1 answer
Curl error (code 3) url malformed laravel
PHP Laravel