Quick example of repository pattern using Yii2 active record

TodoActiveRepository.php

<?php
namespace Todolist\Infrastructure\Persistence\Yii\Respository;

use Todolist\Domain\Model\Todo\Todo;
use Todolist\Domain\Model\Todo\TodoRepository;
use Todolist\Infrastructure\Persistence\Yii\Record\TodoRecord;

class TodoActiveRepository implements TodoRepository
{
  public function forId(TodoId $id)
  {
    //assuming $id has __toString so it can be casted to string automaticaly
    $record = TodoRecord::find()->where([ 'id' => $id ])->one();
    $todo = $this->fromRecord($record);
    return $todo;
  }
  
  public function add(Todo $todo)
  {
    $record = $this->toRecord($todo);
    return $record->save(false); // false beacause domain model should be in valid state dosent need to be validated
  }
  
  public function nextIdentity()
  {
    return TodoId::generate();
  }
  
  
  /**
   * can have its own class TodoAdapter
   */
  private funcion fromRecord(TodoRecord $record)
  {
    return new Todo(TodoId::fromString($record->id), 
                    TodoName::fromString($record->name),
                    Assignee::fromString($record->assignee_id),
                    DueDate::fromFormat($record->due_date, 'Y-m-d')
                   );
  }
  
   /**
   * can have its own class TodoAdapter
   */
  private function toRecord(Todo $todo)
  {
    $record = new TodoRecord();
    $record->setAttributes([
      'id' => (string)$todo->getId(),
      'name' => (string)$todo->getName(),
      'assignee_id' => (string)$todo->getAssignee(),
      'due_date' => (string)$todo->getDueDate()->toFormat('Y-m-d')
    ]);
    return $record;
  }
}

TodoRepository.php

<?php
namespace Todolist\Domain\Model\Todo;

interface TodoRepository
{
  /**
   * fetch a todo by its TodoId
   */
  public function forId(TodoId $id);
  
  public function add(Todo $todo);
  /**
   * generate a TodoId
   * assuming that a Todo is not an autoincrement but an Uuid
   */ 
  public function nextIdentity();
}