Error:You must specify an orderBy clause when using this function - laravel

Question

I am getting the following error while trying to migrate. Actually, I have a lot of data so I used the chunk in laravel.
I am using MongoDB not SQL
** You must specify an orderBy clause when using this function.**
My migration file's up function is is
public function up()
{
ini_set('max_execution_time', 250);
ini_set('memory_limit', '1024M');
$product_array = DB::collection('product')->orderBy('created_at','asc');
$product_array->chunk(20, function($product_array)
{
$cotationPercentForecast=0;
$cotationPercent=0;
$quote_tpl = array();
foreach ($product_array as $key => $value) {
if (isset($value['quote_tpl'])) {
$quote_tpl = $value['quote_tpl'];
$defaultScoreCount = 0;
$realScoreCount = 0;
$forecastScoreCount = 0;
foreach ($quote_tpl as $idxPerimetre => $perimetre) {
if (isset($perimetre['families'])) {
foreach ($perimetre['families'] as $idxFamilies => $family) {
if (isset($family['subfamilies'])) {
foreach ($family['subfamilies'] as $idxSubFamilies => $subfamily) {
if (isset($subfamily['items'])) {
foreach ($subfamily['items'] as $idxitem => $item) {
if (isset($item['criterias'])) {
foreach ($item['criterias'] as $idxcriteria => $criteria) {
if (!isset($criteria['inactive']) || $criteria['inactive'] != 'true') {
$defaultScoreCount++;
if (isset($criteria['real_score'])) {
$realScoreCount++;
}
if (isset($criteria['forecast_score'])) {
$forecastScoreCount++;
}
}
} // FOREACH CRITERIA
} // ISSET CRITERIA ###
} // FOREACH ITEM
} // ISSET ITEM ###
} // FOREACH SUBFAMILY
} // ISSET SUBFAMILY ###
} // FOREACH FAMILY
} // ISSET FAMILY ###
}// FOREACH PERIMETER ##
if ($realScoreCount > 0 && $defaultScoreCount > 0) {
$cotationPercentUn = ($realScoreCount / $defaultScoreCount) * 100;
$cotationPercent = round($cotationPercentUn, 2);
}
if ($forecastScoreCount > 0 && $defaultScoreCount > 0) {
$cotationPercentUnForecast = ($forecastScoreCount / $defaultScoreCount) * 100;
$cotationPercentForecast = round($cotationPercentUnForecast, 2);
}
$results = DB::collection('product')->update(['cotation_percent' => $cotationPercent,'forecast_cotation_percent' => $cotationPercentForecast]);
}
}
});
}
I have gone through many answers here and almost all suggest to use orderBy so I used it. But still getting the error.
i have used
Product::chunk(5, function($product_array){}
Any help is appreciated. Thanks in advance.

Answer 1

This warning is added when Laravel internally uses enforceOrderBy which is defined inside Illuminate/Database/Query/Builder.
Whenever you use chunk on a query builder instantiated by DB facade Illuminate\Database\Query\Builder directly, it would ask you :
You must specify an orderBy clause when using this function.
So it will happen if you are doing :
\DB::table('product')->chunk(10, function($product){
...
});
If you manually add an order by to this, it will not throw the error and will work as expected :
\DB::table('product')->orderBy('created_at')->chunk(10, function($product){
...
});
However, its better to use the Eloquent Model directly like which will not enforce you to add an order by clause manually :
Product::chunk(10, function($product){
...
});
Also there is no method DB::collection(), you can use DB::table() instead if you wish, unless you are using mongodb and not MySQL