ldc-crm/app/Models/CustomerAnswer.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Relations\Pivot;

/**
 * @property integer $answer_id                            Foreign key Answer.
 * @property integer $customer_id                          Foreign key Customer.
 * @property-read \Illuminate\Support\Carbon $created_at   Created date.
 *
 * @property-read \App\Models\Customer $customer Customer BelongsTo relation.
 * @property-read \App\Models\Answer $answer Answer BelongsTo relation.
 */
class CustomerAnswer extends Pivot
{
    /**
     * Inhibit update_at column as we only have
     * created_at.
     *
     * @return null
     */
    public function getUpdatedAtColumn()
    {
        return null;
    }

    // * RELATIONS

    /**
     * Customer belongsTo relation.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function customer(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(Customer::class);
    }

    /**
     * Customer belongsTo relation.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function answer(): \Illuminate\Database\Eloquent\Relations\BelongsTo
    {
        return $this->belongsTo(Answer::class);
    }
}