Allowed memory size of 8589934592 bytes exhausted
Diese Art von Fehlern wird durch eine große Menge an Daten im Speicher verursacht, daher besteht die Möglichkeit, sie zu beheben, darin, ein weniger schweres Speicherskript zu schreiben. Durch Ändern von memory_limit wir bekommen nur eine zeitliche Fixierung, denn wenn unsere Daten wachsen, kommen sie zurück.
$campaigns = Campaign::all(); //at this point you are pulling the whole Campaigns table to memory.. and you pull some extra rows after that increasing even more the memory use
Wie ich bereits sagte, ist Elloquent bei dieser Art von Aufgabe nicht effizient, also holen wir uns die Datenbankzeilen, wie es mysqli früher getan hat, eine nach der anderen:
$db = DB::connection()->getPdo(); //get a database connection instance
$main_query_sql = "SELECT * FROM Campaigns"; //write our query
$main_query = $db->prepare($main_query_sql); //prepare it to get executed
$main_query->execute(); //execute our query
$visits_denied_sql = "SELECT COUNT(*) as total FROM VISITS WHERE DENIED = 1 AND CAMPAIGN_ID ="; //let's prepare our aggregate queries
$visits_allowed_sql = "SELECT COUNT(*) as total FROM VISITS WHERE DENIED = 0 AND CAMPAIGN_ID ="; //I just assumed them so change it as you need
$visits_denied = null;
$visits_allowed = null;
while($campaign = $main_query->fetch()){ //fetch our rows one by one
//now we are getting an associative array from the db instead of a model so we cannot use it as a Laravel Model (we can't use ->save() method or eager loading)
$visits_denied = $db->prepare($visits_denied_sql.$campaign['id']);
$visits_denied = $visits_denied->execute();
$denied_visits = $visits_denied->fetch();
$visits_allowed= $db->prepare($visits_allowed_sql.$campaign['id']);
$visits_allowed= $visits_allowed->execute();
$allowed_visits = $visits_allowed->fetch();
$campaign['denied_visits'] = $denied_visits['total'];
$campaign['allowed_visits'] = $allowed_visits['total'] ;
//edit with the correct update sentence:
$insert_query_sql = "UPDATE CAMPAIGNS SET allowed_visits = :visits_allowed, denied_visits = :visits_denied WHERE id = :id";
$insert_query = $db->prepare($insert_query_sql);
$insert_query->bindParam(':visits_allowed', $campaign['allowed_visits']);
$insert_query->bindParam(':visits_denied', $campaign['denied_visits']);
$insert_query->bindParam(':id', $campaign['id']);
$insert_query->execute();
}
Probieren Sie dies in Ihrem Zeitplan aus und lassen Sie mich wissen, ob es funktioniert hat!
