amount . ($this->description ? ' | ' . substr($this->description, 0, 15) : '') . ' | ' . friendly_date_time($this->created_at); } public function customer() { return $this->hasOne(Customer::class, 'id', 'customer_id'); } public function invoiceTransactions() { return $this->hasMany(InvoiceTransaction::class, 'invoice_id', 'id')->orderBy('created_at', 'ASC'); } }