Using collection method reduce() -

Category: Collections Topic: Collection Methods Created: 3 years ago

reduce() method is used to get single result from eloquent collection

Suppose, we need to do summation on each rating field in ratings tbl to get accumulated points, we can implement this using reduce()

Code snippet will be like below.

$ratings = Rating::all();

$totalPoints = $ratings->reduce( function( $carry, $rating ) {
    return $carry + $rating->rating;
}, 0); // default value for carry is set to 0

Above, reduce() method takes two parameters - carry which is set to 0 initially and collection item in each iteration.

One other thing to note, the above result can also be achieved with collection sum() method like below

$ratings = Rating::all();
$ratings->sum('rating');

Last Edited: 3 years ago

Using collection method reduce()

Related Posts

Using pluck() method of Laravel Collection

Using sortBy() collection method for sorting relation after eloquent query if required

Using collection method filter() and map() on eloquent queries instead of using loop and if statement

Using collection method map() in another way

A few other collection methods sum(), avg(), isEmpty(), isNotEmpty(), reverse(), shuffle(), take() and chunk()

Array manipulation with most commonly used Laravel collection methods