How Can I Selectively Choose Columns When Eager Loading with Laravel's `with()` Method?

Selective Column Selection Using "With()" in Laravel Eloquent

In Laravel Eloquent, the "with()" function provides an efficient way to eager load related models from a specified table. However, it is not limited to loading all columns. To select specific columns from a joined table using "with()", follow these steps:

1. Pass an anonymous closure as the second parameter inside the "with()" array.
2. Within the closure, use the "$query" parameter to specify the columns to be selected from the joined table using the "select()" method.

For example, to fetch posts along with only the "id" and "username" from the associated user model:

Post::query()
    ->with(['user' => function ($query) {
        $query->select('id', 'username');
    }])
    ->get();

Note: Ensure that the primary key ("id" in this case) is the first parameter in the "$query->select()" statement for proper result retrieval.

The above is the detailed content of How Can I Selectively Choose Columns When Eager Loading with Laravel's `with()` Method?. For more information, please follow other related articles on the PHP Chinese website!