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Example code of bulton-fr/doctrine_yield

Informations about the package doctrine_yield

Doctrine Yield

A trait to have methods allowed you to yield Doctrine result.

Note: Tested on Doctrine 2.6 only.
But if semver is respected, it should be work on all 2.x version.

Install it

composer require bulton-fr/doctrine_yield

How use it

In your Repository class, add the trait like this :

And where you want obtain datas (a controller for this example) :

How it's work

In the trait, you have the method yieldAll, it call yieldQuery with the QueryBuilder in argument.
We obtain the Query instance from the QueryBuilder and call Query::iterate to loop on each row, and yield each row.
iterate do a fetchRow to obtain the next line. So we NOT get all rows to loop and yield on it.
To avoid an override memory from Doctrine, we "detach" each yielded row from the EntityManager. If you don't want detach the row, you can define the argument $detachRows to false. On yieldAll method, it's the first method's argument.

Yield with custom queries

You can use the same way of yieldAll method to yield with a custom query. At the end of your custom query, instead of return something, you need to do yield from $this->yieldQuery($qb);.
Also don't forget to include the trait in your repository.

All versions of doctrine_yield with dependencies

PHP Build Version
Package Version
Requires doctrine/orm Version ^2.6
php Version ^7.0
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