How to Implement Left Joins in Doctrine for Credit History Retrieval?

How to Perform Left Joins in Doctrine

In your function getHistory(), you're attempting to retrieve the credit history of a user. However, the initial syntax in your join clause resulted in an error.

To perform a left join in Doctrine, you can use the following syntax:

<code class="php">$qb
    ->select('a', 'u')
    ->from('Credit\Entity\UserCreditHistory', 'a')
    ->leftJoin('a.user', 'u')
    ->where('u = :user')
    ->setParameter('user', $users)
    ->orderBy('a.created_at', 'DESC');</code>

Here, a represents the alias for the UserCreditHistory entity, and u represents the alias for the joined User entity. By using the leftJoin() method, you're specifying that you want to include rows from the User table that are not matched in the UserCreditHistory table.

Alternatively, if you don't have an association between the two entities, you can use the following syntax:

<code class="php">$qb
    ->select('a', 'u')
    ->from('Credit\Entity\UserCreditHistory', 'a')
    ->leftJoin(
        'User\Entity\User',
        'u',
        \Doctrine\ORM\Query\Expr\Join::WITH,
        'a.user = u.id'
    )
    ->where('u = :user')
    ->setParameter('user', $users)
    ->orderBy('a.created_at', 'DESC');
````
</code>

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