Unable to Save Pivot Data

Hi October,

I am facing an issue while trying to save a belongsToMany relationship with pivot data.
All was going well, until I introduced a pivotModel

class Bundle extends Model
    public $belongsToMany = [
        'compositions' => [
            'table' => 'prd_product_composition',
            'pivotModel' => Composition::class,
            'key' => 'product_id',
            'otherKey' => 'composition_id',
            'pivot' => ['min_quantity']

and this is the Pivot model

class Composition extends Pivot
    public function product(): BelongsTo
        return $this->belongsTo(Product::class, 'composition_id');

    public function getTotalPriceAttribute(): float
        return $this->min_quantity * $this->product->selling_price;

I used RelationController to manage the data,

The error appears when I try to save the relation data.

"Illuminate\Database\Eloquent\Model::save(): Argument #1 ($options) must be of type array, null given, called in /home/.../modules/backend/behaviors/relationcontroller/HasPivotMode.php on line 141" on line 1113 of /home/.../vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php

By the hint from error message, I change modules/backend/behaviors/relationcontroller/HasPivotMode.php line 141 & 119
from $modelToSave->save(null, $this->pivotWidget->getSessionKey());
to $modelToSave->save([], $this->pivotWidget->getSessionKey());
and everything is running again.

Is there something wrong with my code or any advice in this case?
Thank you

Hey @wurin7i

You may need to update your Pivot model to extend October\Rain\Database\Pivot instead of Illuminate\Database\Eloquent\Relations\Pivot.

There are slight differences in the API, and Laravel has made the save() method stricter. We have made a note to review this internally.


This specific error has been fixed in v3.5, but it may produce other unpredictable results that we haven’t tested. Hopefully, it just works!