Laravel orderBy date is not working when using paginator

问题

I am new to laravel and am struggling to figure this one out.I am trying to order my posts by date and also use the paginator. Whenever I remove the paginator. it orders by date, but adding it back in orders by id, I think?

My model

class Post extends Model
{
    //

protected $dates = ['date'];
}

My controller method

public function show()
    {

        $posts = Post::orderBy('date','desc')->get();


        return view('welcome',['posts' => Post::paginate(5)], compact('posts'));
    }

回答1:

You're essentially retrieving all posts and then paginating them, after retrieving all posts and ordering them.

Your code breaks down like this:

public function show()
{

    // retrieve posts and order them by date
    $posts = Post::orderBy('date','desc')->get();

    // retrieve posts again and paginate them
    return view('welcome',['posts' => Post::paginate(5)], compact('posts'));
}

You have two options --

Get posts, order them, paginate them, and store them in a variable that you pass to your view:

public function show()
{

    $posts = Post::orderBy('date','desc')->paginate(5);


    return view('welcome', compact('posts'));
}

Or get the posts, order them and paginate them while passing them to the view:

public function show()
{

    return view('welcome',[ 'posts' => Post::orderBy('date','desc')->paginate(5) ]);
}

来源：https://stackoverflow.com/questions/39174377/laravel-orderby-date-is-not-working-when-using-paginator