I created a custom database table and now want to fetch data, but getCollection method is deprecated and I can't find any other method that suits my case. Here's the example of my code:

use Magento\Customer\Model\ResourceModel\Customer\CollectionFactory;
use <MyName>\<MyModule>\Model\UserUpdateFactory;

class CustomerChangeTracker {

private $customer;

private $previousCustomer;

private $current = [];

public function __construct(CollectionFactory $customer, UserUpdateFactory $previousCustomer)
    $this->customer = $customer;
    $this->previousCustomer = $previousCustomer;

public function getChangesSinceLastTime(): array
    $current = [];
    $collection = $this->customer->create();
    foreach ($collection as $customer) {
        $current[$customer->getId()] = $customer->getData('updated_at');

    $previous = [];
    foreach ($this->previousCustomer->create()->getCollection() as $customer) {
        $previous[$customer->getData('customer_id')] = $customer->getData('updated_at');
  • you shouldnt need to add the getCollection as $this->previousCustomer->create() is doing that already – Dava Gordon Aug 20 at 9:38
  • did you create resourcemodel and model for your custom table? – aravind Aug 20 at 10:50
  • Yes, I did create Resource Model and Model. – Violeta Aug 20 at 11:14
  • Thank you all, I realized I was using model factory, not collection factory. Now everything is ok. – Violeta Aug 20 at 13:10

You don't need to call getCollection on a collection factory class. Because as the name says it is already a collection. Alternatively you could use the resource model and call the collection from it.

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