Laravel Relationship Recipes: Simplify Querying with newestOfMany
Welcome back to our Laravel Relationship Recipes series! Today, we're introducing another handy method in Laravel Eloquent relationships: newestOfMany. This method simplifies querying for the newest model in a hasMany relationship.
Understanding the Scenario
Consider the scenario where you have an Employee model with a hasMany relationship to Paycheck models. You constantly need to retrieve the newest paycheck for each employee.
Introducing the newestOfMany Method
Similar to oldestOfMany, you can create a relationship method for the newest model in your Employee model:
class Employee extends Model
{
public function latestPaycheck()
{
return $this->hasOne(Paycheck::class)->latestOfMany();
}
}
By using the hasOne method and chaining latestOfMany, Laravel will automatically retrieve the newest paycheck for each employee.
Limitations
As with oldestOfMany, it's important to note that the newestOfMany method relies on auto-increment IDs to determine the newest model. If you're using UUIDs as foreign keys, this method won't work as expected.
Conclusion
The newestOfMany method in Laravel Eloquent relationships provides a convenient way to retrieve the newest model in a hasMany relationship without the need for custom queries. By leveraging this method, you can simplify your code and improve maintainability.
Stay tuned for more Laravel Relationship Recipes in this series, where we'll continue to explore useful methods for working with Eloquent relationships!
Top comments (1)
I can understand why the default is id, because that is the column that is the most likely to exist.
But if you know the table is going to be queried by order you can use
$this->timestamps()in the table migration. And then you can do$this->hasOne(Paycheck::class)->latestOfMany('created_at').