Symfony 5 & EasyAdmin 3.0 - /admin route not found

You need to create at least one dashboard. Try:

php bin/console make:admin:dashboard

Next, you can create a CrudController with:

php bin/console make:admin:crud

https://symfony.com/doc/master/bundles/EasyAdminBundle/dashboards.html

Yeah, I am reading this book right now and ran into the same issue.

First, make sure that your working directory is clean (run "git status" and remove all changes made by EasyAdminBundle setup).

Then run:

composer require easycorp/easyadmin-bundle:2.*

to install EasyAdminBundle version 2; with this version, you can proceed as described in the book.

As others have already said you need to create a dashboard with:

php bin/console make:admin:dashboard

And then create at least one crud controller. Since it seems you're using the Fast Track book, you need to type the following command twice and make one for both Comment and Conference:

php bin/console make:admin:crud

I am using the Fast Track book too and this is how my files ended up. I am still learning easy admin3 and thus make no claims as to best practice, but this should make the menus look as they do in the Fast Track screenshots:

src/Controller/Admin/DashboardController.php:

/**
 * @Route("/admin", name="admin")
 */
public function index(): Response
{
    $routeBuilder = $this->get(CrudUrlGenerator::class)->build();

    return $this->redirect($routeBuilder->setController(ConferenceCrudController::class)->generateUrl());
}

public function configureDashboard(): Dashboard
{
    return Dashboard::new()
        ->setTitle('Guestbook');
}

public function configureMenuItems(): iterable
{
    yield MenuItem::linktoRoute('Back to website', 'fa fa-home', 'homepage');
    yield MenuItem::linkToCrud('Conference', 'fa fa-map-marker', Conference::class);
    yield MenuItem::linkToCrud('Comment', 'fa fa-comment', Comment::class);
}

src/Controller/Admin/CommentCrudController.php:

public static function getEntityFqcn(): string
{
    return Comment::class;
}

public function configureFields(string $pageName): iterable
{
    return [
        IdField::new('id')->hideOnForm(),
        TextField::new('author'),
        TextareaField::new('text')->hideOnIndex(), // Removing ->hideOnIndex() will display a link to a text modal
        EmailField::new('email'),
        DateTimeField::new('createdAt')->hideOnForm(),
        ImageField::new('photoFilename', 'Photo')->setBasePath('/uploads/photos')->hideOnForm(),

        AssociationField::new('conference')
    ];
}

src/Controller/Admin/ConferenceCrudController.php

public static function getEntityFqcn(): string
{
    return Conference::class;
}

public function configureFields(string $pageName): iterable
{
    return [
        IdField::new('id')->hideOnForm(),
        TextField::new('city'),
        TextField::new('year'),
        BooleanField::new('isInternational'),
        IntegerField::new('commentCount', 'Comments')->hideOnForm()
    ];
}

And in src/Entity/Conference.php I added the following to make commentCount available:

public function getCommentCount(): int
{
    return $this->comments->count();
}

To generate the createdAt datetime automatically when the comment is submitted, I first installed the following bundle:

$ composer require stof/doctrine-extensions-bundle

And then modified config/packages/stof_doctrine_extensions.yaml:

stof_doctrine_extensions:
    default_locale: en_US
    orm:
        default:
            tree: true
            timestampable: true

And finally decorated private $createdAt in src/Entity/Comment.php with the following:

/**
 * @var \DateTime
 * @ORM\Column(type="datetime")
 * @Gedmo\Mapping\Annotation\Timestampable(on="create")
 * @Doctrine\ORM\Mapping\Column(type="datetime")
 */
private $createdAt;

EasyAdminBundle v3 have another configuration and you no longer need to use EasyAdminController resource.

You can find more information about it here

https://github.com/EasyCorp/EasyAdminBundle/blob/master/src/Controller/EasyAdminController.php

and here

https://symfony.com/doc/master/bundles/EasyAdminBundle/dashboards.html

When migrating from easyadmin 2 to 3, it appears that the route name is not preserved. One way to do this is in DashboardController, add

/**
 * @Route("/admin", name="easyadmin")
 */
public function index(): Response
{
    return parent::index();
}

I solved this problem as follows:

1. Remove EasyAdmin 3

composer remove admin

2. Install additional package.

composer require "easycorp/easyadmin-bundle":"^2.3"

3. Update packages.

composer update

In my case

first

composer remove doctrine/common

and then

 composer require easycorp/easyadmin-bundle v2.3.9 doctrine/common v2.13.3 doctrine/persistence v1.3.8

With that it worked for the book

For me, the clearest and most complete explanation is the answer to @AnnaHowell I would only change a part of your code. In src/Controller/Admin/CommentCrudController.php:

 public function configureFields(string $pageName): iterable
{
    $avatar = ImageField::new('photoFilename')->setBasePath('uploads/photos/')->setLabel('Photo');
    $avatarTextFile = TextField::new('photoFilename');
   
     {
        yield     TextField::new('author');
        yield     TextEditorField::new('text');
        yield     TextField::new('state');
        yield     EmailField::new('email');
        yield     DateTimeField::new('createdAt', 'Created')->setFormat('dd-MM-y HH:mm:ss')
                ->setSortable(true)->setFormTypeOption('disabled','disabled');
        if (Crud::PAGE_INDEX === $pageName) {
        yield ImageField::new('photoFilename')->setBasePath('uploads/photos/')->setLabel('Photo');
    } elseif (Crud::PAGE_EDIT === $pageName) {
       yield TextField::new('photoFilename')->setLabel('Photo');
    }      
       
};

Thus, we allow the Administrator to not only evaluate the text, but also the relevance of the photo. What if a comment has great text, but an inconvenient or trivial photo? The Administrator could delete the name of the photo (and that way it would not be visible), leave the text comment and publish it.

Simply copy all of /vendor/easycorp/easyadmin-bundle/src/Resources/public to public/bundles/easyadmin

Short answer:

Make sure you are using HTTPS to access the admin route. Even if the admin route is supposed to use any scheme in the debug:router command.

Detailed answer

Same situation, reproducible with Symfony 4.4 and Symfony 5.2 and Easyadmin 3.2

I found out that I was accessing my server with http (WAMP):

Then I tried with

symfony console server:start

Noticed the warning about installing the certificate, installed it and ran again the symfony server.

After than I was able to use HTTPS, and the admin was accessible on https://localhost/admin