use Doctrine\ORM\Mapping as ORM;

/** @ORM\Entity */
class Customer
{
    // ...

    public function getFullName()
    {
        return $this->getFirstName().' '.$this->getLastName();
    }
}

public function configureFields(string $pageName): iterable
{
    return [
        TextField::new('fullName'),
        // ...
    ];
}

public function configureFields(string $pageName): iterable
{
    return [
        IdField::new('id')->hideOnForm(),
        TextField::new('firstName'),
        TextField::new('lastName'),
        TextField::new('phone'),
        EmailField::new('email')->hideOnIndex(),
        DateTimeField::new('createdAt')->onlyOnDetail(),
    ];
}

use EasyCorp\Bundle\EasyAdminBundle\Config\Crud;

public function configureFields(string $pageName): iterable
{
    $id = IdField::new('id');
    $firstName = TextField::new('firstName');
    $lastName = TextField::new('lastName');
    $phone = TextField::new('phone');
    $email = EmailField::new('email');
    $createdAt = DateTimeField::new('createdAt');

    if (Crud::PAGE_INDEX === $pageName) {
        return [$id, $firstName, $lastName, $phone];
    } elseif(Crud::PAGE_DETAIL === $pageName) {
        return ['...'];
    } else {
        return ['...'];
    }
}

public function configureFields(string $pageName): iterable
{
    yield IdField::new('id')->hideOnForm();

    if ('... some expression ...') {
        yield TextField::new('firstName');
        yield TextField::new('lastName');
    }

    yield TextField::new('phone');
    yield EmailField::new('email')->hideOnIndex();
    yield DateTimeField::new('createdAt')->onlyOnDetail();
}

// not defining the label explicitly or setting it to NULL means
// that the label is autogenerated (e.g. 'firstName' -> 'First Name')
TextField::new('firstName'),
TextField::new('firstName', null),

// set the label explicitly to display exactly that label
TextField::new('firstName', 'Name'),

// set the label to FALSE to not display any label for this field
TextField::new('firstName', false),

TextField::new('firstName', 'Name')
    // CSS class/classes are applied to the field contents (in the 'index' page)
    // or to the row that wraps the contents (in the 'detail', 'edit' and 'new' pages)

    // use this method to add new classes to the ones applied by EasyAdmin
    ->addCssClass('text-large text-bold')
    // use this other method if you want to remove any CSS class added by EasyAdmin
    ->setCssClass('text-large text-bold')

    // this defines the Twig template used to render this field in 'index' and 'detail' pages
    // (this is not used in the 'edit'/'new' pages because they use Symfony Forms themes)
    ->setTemplatePath('admin/fields/my_template.html.twig')

    // only applied to 'index' page. Useful for example to right-align numbers
    ->setTextAlign('right')

TextField::new('firstName', 'Name')
    // callbacks usually take only the current value as argument...
    ->formatValue(function ($value) {
        return $value < 10 ? sprintf('%d **LOW STOCK**', $value) : $value;
    })

    // ...but callables also receives the entire entity instance as the second argument
    ->formatValue(function ($value, $entity) {
        return $entity->isPublished() ? $value : 'Coming soon...';
    })

    // in PHP 7.4 and newer you can use arrow functions
    // ->formatValue(fn ($value) => $value < 10 ? sprintf('%d **LOW STOCK**', $value) : $value)
    // ->formatValue(fn ($value, $entity) => $entity->isPublished() ? $value : 'Coming soon...')

TextField::new('firstName', 'Name')
    // if TRUE, listing can be sorted by this field (default: TRUE)
    // unmapped fields and Doctrine associations cannot be sorted
    ->setSortable(false)

    // help message displayed for this field in the 'detail', 'edit' and 'new' pages
    ->setHelp('...')

    // the Symfony Form type used to render this field in 'edit'/'new' pages
    // (fields have good default values for this option, so you don't usually configure this)
    ->setFormType(TextType::class)

    // an array of parameters passed to the Symfony form type
    ->setFormTypeOptions(['option_name' => 'option_value'])

namespace App\Admin\Field;

use EasyCorp\Bundle\EasyAdminBundle\Contracts\Field\FieldInterface;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;

final class MapField implements FieldInterface
{
    use FieldTrait;

    public const OPTION_MAP_PROVIDER = 'mapProvider';

    public static function new(string $propertyName, ?string $label = null): self
    {
        return (new self())
            // ...
            ->setCustomOption(self::OPTION_MAP_PROVIDER, 'openstreetmap')
        ;
    }

    public function useGoogleMaps(): self
    {
        $this->setCustomOption(self::OPTION_MAP_PROVIDER, 'google');

        return $this;
    }

    public function useOpenStreetMap(): self
    {
        $this->setCustomOption(self::OPTION_MAP_PROVIDER, 'openstreetmap');

        return $this;
    }
}