Be part of JetBrains PHPverse 2026 on June 9 – a free online event bringing PHP devs worldwide together.

Gabotronix's avatar

Laravel HasManyThrough relationship causing memory leaks on creation

in my laravel app I created a polls system where users can vote, I achieved this with hasManyThrough relationship.

When I create one or multiple polls (from seeder or public method) I get the following error:

PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 20480 bytes) in /Users/gabriel/Desktop/proyectos/laraapp.com/vendor/monolog/monolog/src/Monolog/Logger.php on line 350
PHP Fatal error:  Allowed memory size of 2147483648 bytes exhausted (tried to allocate 20480 bytes) in /Users/gabriel/Desktop/proyectos/laraapp.com/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php on line 203

I even changed PHP memory_limit to 1024 and 2048, still getting the error.

Poll model relationships:

public function options()
    {
        return $this->hasMany('App\Models\Option');
    }

    public function votes()
    {
        return $this->hasManyThrough('App\Models\Vote', 'App\Models\Option');
    }

Polls migration:

Schema::create('polls', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table->string('question');
            $table->integer('isActive');
            $table->timestamps();
        });

Option Model:

public function poll()
    {
        return $this->belongsTo('App\Models\Poll');
    }

    public function votes()
    {
        return $this->hasMany('App\Models\Vote');
    }

Options migration:

Schema::create('options', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table-> unsignedBigInteger('poll_id')->index()->nullable();
            $table->foreign('poll_id')->references('id')->on('polls')->onDelete('cascade')->onUpdate('cascade')->nullable();
            $table->string('text');
            $table->timestamps();
        });

Vote model:

public function user()
    {
        return $this->belongsTo('App\Models\User');
    }

    public function option()
    {
        return $this->belongsTo('App\Models\Option');
    }

Votes migration:

Schema::create('votes', function (Blueprint $table) {
            $table->bigIncrements('id');
            $table-> unsignedBigInteger('user_id')->index()->nullable();
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade')->onUpdate('cascade')->nullable();
            $table-> unsignedBigInteger('option_id')->index()->nullable();
            $table->foreign('option_id')->references('id')->on('users')->onDelete('cascade')->onUpdate('cascade')->nullable();
            $table->unique(['user_id', 'option_id']);
            $table->timestamps();
        });

And then when I want to create a poll with my seeder (memory error comes even when I create a SINGLE row):

Right now my json file looks like this:

[
    { "isActive" : 1, "question" : "¿Qué es lo más importante para ti en una primera cita?",  "optionOne" : "Una buena conversación", "optionTwo" : "Atracción física", "optionThree" : "Sentido del humor","optionFour" : "Intereses comunes"  }
]
```
PollsSeeder
```
$json = File::get(base_path() . '/json/Polls.json');
$polls = json_decode($json, true);

Log::info('Decoded JSON:', $polls);

foreach ($polls as $key => $data) 
            {

                $poll = Poll::create([
                    'question' => $data['question'],
                    'isActive' => $data['isActive'],
                ]);

                if($data['optionOne'] != '')
                {
                    Option::create([
                        'poll_id' => $poll->id,
                        'text' => $data['optionOne'],
                    ]);
                }

                if($data['optionTwo'] != '')
                {
                    Option::create([
                        'poll_id' => $poll->id,
                        'text' => $data['optionOne'],
                    ]);
                }

                if($data['optionThree'] != '')
                {
                    Option::create([
                        'poll_id' => $poll->id,
                        'text' => $data['optionOne'],
                    ]);
                }

                if($data['optionFour'] != '')
                {
                    Option::create([
                        'poll_id' => $poll->id,
                        'text' => $data['optionOne'],
                    ]);
                }
        
            }
```
0 likes
1 reply
nexxai's avatar

This sounds stupid, but based on the error being monolog related, it seems like it might actually be failing trying to log the decoded $polls before it even gets to the point where it tries to create the Poll.

Are you able to take out the logging to see if it dies in the same spot?

Please or to participate in this conversation.