Boostrap 4 alpha 6-row behavior inside the map

Question

I am using bootstrap 4 alpha 6 and I notice strange behavior when using the grid inside the body of the card without a card block.

<div class="container">
    <h5>
    The building block of a card is the .card-block. Use it whenever you need a padded section within a card.
    </h5>
    <h4>
    row inside card "body" with class card-block
    </h4>
    <div class="card">
        <div class="card-header">
            Featured
        </div>
        <div class="card-block">
            <div class="row">
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
            </div>
        </div>
    </div>
    <br>
    <br>
    <h4>
    row inside card "body" without class card-block
    </h4>
    <div class="card">
        <div class="card-header">
            Featured
        </div>
        <div class="foo">
            <div class="row">
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
                <div class="col-md-2">
                    <div class="photo-box">
                        <img class="img-fluid" src="http://placehold.it/400x300" alt="image">
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

I do not want to use the registration for the body of my card

The building block of a card is a .card block. Use it whenever you need a pad in your pocket.

but my grid comes out of the card body.
Is the desired behavior or a bug to fix?

thank

JSFiddle (open full view)

Answer 1

. .row , ( .row). , , - .

.row .container .container-fluid, 15px padding, . .card-block , 15px, .card-block card.

, , , card. - .container-fluid, ...

<div class="card">
        <div class="container-fluid">
            <div class="row">
                <div class="col-md-2">
                    ..
                </div>
                <div class="col-md-2">
                    ..
                </div>
                ..
             </div>
        </div> 
</div>

(.no-gutters). . .

<div class="card">
        <div class="row no-gutters">
                <div class="col-md-2">
                    ..
                </div>
                <div class="col-md-2">
                    ..
                </div>
                ..
        </div>
</div>

http://www.codeply.com/go/vE2EdNPQwV