PHP, framework - Class must be declared abstract - php

Question

I'm introducing to Phalcon, a php framework, by following the tutorial: https://docs.phalconphp.com/en/latest/reference/tutorial-rest.html
I'm facing with this problem: I have this error in the code below
class Robots must be declared abstract or implement methods
'getConnectionService(), setForceExists() etc..'
<?php
use Phalcon\Mvc\Model;
use Phalcon\Mvc\Model\Message;
use Phalcon\Mvc\Model\Validator\Uniqueness;
use Phalcon\Mvc\Model\Validator\InclusionIn;
class Robots extends Model{
public function validation()
{
// Type must be: droid, mechanical or virtual
$this->validate(
new InclusionIn(
array(
"field" => "type",
"domain" => array(
"droid",
"mechanical",
"virtual"
)
)
)
);
// Robot name must be unique
$this->validate(
new Uniqueness(
array(
"field" => "name",
"message" => "The robot name must be unique"
)
)
);
// Year cannot be less than zero
if ($this->year < 0) {
$this->appendMessage(new Message("The year cannot be less than zero"));
}
// Check if any messages have been produced
if ($this->validationHasFailed() == true) {
return false;
}
}
}
?>
And even if I try to execute an HTTP request i get:
Cannot instantiate abstract class Robots
Any ideas?

Answer 1

You probably didn't set your database service properly. Make sure that:
The service name is db (I've experienced problems changing the default services names)
You have set the db service in your main $di (some might instantiate another DI container and isolate the database service there)
Always use $di->setShared(...) for registering global services
Please provide more information and will be glad to help.