Laravel: Get Object From Collection By Attribute

In Laravel, if I perform a query:

$foods = Food::where(...)->get();

...then $foods is an Illuminate Collection of Food model objects. (Essentially an array of models.)

However, the keys of this array are simply:

[0, 1, 2, 3, ...]

...so if I want to alter, say, the Food object with an id of 24, I can't do this:

$desired_object = $foods->get(24);
$desired_object->color = 'Green';
$desired_object->save();

...because this will merely alter the 25th element in the array, not the element with an id of 24.

How do I get a single (or multiple) element(s) from a collection by ANY attribute/column (such as, but not limited to, id / color / age / etc.)?

Of course, I can do this:

foreach ($foods as $food) {
    if ($food->id == 24) {
        $desired_object = $food;
        break;
    }
}
$desired_object->color = 'Green';
$desired_object->save();

...but, that's just gross.

And, of course, I can do this:

$desired_object = Food::find(24);
$desired_object->color = 'Green';
$desired_object->save();

...but that's even more gross, because it performs an additional unnecessary query when I already have the desired object in the $foods collection.

Thanks in advance for any guidance.

EDIT:

To be clear, you can call ->find() on an Illuminate Collection without spawning another query, but it only accepts a primary ID. For instance:

$foods = Food::all();
$desired_food = $foods->find(21);  // Grab the food with an ID of 21

However, there is still no clean (non-looping, non-querying) way to grab an element(s) by an attribute from a Collection, like this:

$foods = Food::all();
$green_foods = $foods->where('color', 'green'); // This won't work.  :(

Solution 1:

You can use filter, like so:

$desired_object = $food->filter(function($item) {
    return $item->id == 24;
})->first();

filter will also return a Collection, but since you know there will be only one, you can call first on that Collection.

You don't need the filter anymore (or maybe ever, I don't know this is almost 4 years old). You can just use first:

$desired_object = $food->first(function($item) {
    return $item->id == 24;
});

Solution 2:

Laravel provides a method called keyBy which allows to set keys by given key in model.

$collection = $collection->keyBy('id');

will return the collection but with keys being the values of id attribute from any model.

Then you can say:

$desired_food = $foods->get(21); // Grab the food with an ID of 21

and it will grab the correct item without the mess of using a filter function.

Solution 3:

As from Laravel 5.5 you can use firstWhere()

In you case:

$green_foods = $foods->firstWhere('color', 'green');