Convert queries to expected array efficiently - Laravel - php

Question

I have a dictionaries table looks like this:
Here is the array result that I want:
I've already achieved the result by these ugly code:
$dictionaries = Dictionary::all();
$carriers_array = [];
$carriers = $dictionaries->unique('Carrier');
foreach($carriers as $carrier) {
$carriers_array[] = $carrier->Carrier;
}
$DOM_INLs_array = [];
foreach($carriers_array as $carrier_item) {
$DOM_INLs = $dictionaries->where('Carrier', $carrier_item)->unique('DOM_INL');
foreach($DOM_INLs as $DOM_INL) {
$DOM_INLs_array[$carrier_item][] = $DOM_INL->DOM_INL;
}
}
$groups_array = [];
foreach($DOM_INLs_array as $carrier => $DOM_INLs) {
foreach($DOM_INLs as $DOM_INL) {
$groups = $dictionaries->where('Carrier', $carrier)->where('DOM_INL', $DOM_INL)->unique('Group');
foreach($groups as $group) {
$groups_array[$carrier][$DOM_INL][] = $group->Group;
}
}
}
$routes_array = [];
foreach($groups_array as $carrier => $DOM_INLs) {
foreach($DOM_INLs as $DOM_INL => $groups) {
foreach($groups as $group) {
$routes = $dictionaries->where('Carrier', $carrier)->where('DOM_INL', $DOM_INL)->where('Group', $group)->unique('Route');
foreach($routes as $route) {
$routes_array[$carrier][$DOM_INL][$group][] = $route->Route;
}
}
}
}
$sectors_array = [];
foreach($routes_array as $carrier => $DOM_INLs) {
foreach($DOM_INLs as $DOM_INL => $groups) {
foreach($groups as $group => $routes) {
foreach($routes as $route) {
$sectors = $dictionaries->where('Carrier', $carrier)->where('DOM_INL', $DOM_INL)->where('Group', $group)->where('Route', $route)->unique('Sector');
foreach($sectors as $sector) {
$sectors_array[$carrier][$DOM_INL][$group][$route][] = $sector->Sector;
}
}
}
}
}
dd($sectors_array);
But it runs very slow, I want another way to get the same result but more efficient. Can anyone help?

Answer 1

This looks like a bunch of nested maps and groupBys with a pluck at the end:
Arrow functions, PHP 7.4+:
$dictionaries->groupBy('Carrier')
->map(fn ($i) => $i->groupBy('DOM_INL')
->map(fn ($i) => $i->groupBy('Group')
->map(fn ($i) => $i->groupBy('Route')
->map->pluck('Sector')
)
)
);
With anonymous functions:
$dictionaries->groupBy('Carrier')->map(function ($i) {
return $i->groupBy('DOM_INL')->map(function ($i) {
return $i->groupBy('Group')->map(function ($i) {
return $i->groupBy('Route')->map->pluck('Sector');
});
});
});
If you only needed these results grouped in this way and didn't need the leaves to just be the 'Sector' values this would be 1 call to groupBy:
$dictionary->groupBy(['Carrier', 'DOM_INL', 'Group', 'Route'])