public function column_form_type($item)
 {
     $types = erp_ac_get_sales_form_types();
     if (array_key_exists($item->form_type, $types)) {
         return sprintf('<a href="%1$s">%2$s</a>', admin_url('admin.php?page=' . $this->slug . '&action=view&id=' . $item->id), $types[$item->form_type]['label']);
     }
 }
<div class="wrap">
    <h2>
        <?php 
_e('Sales Transactions', 'erp-accounting');
?>

        <?php 
$form_types = erp_ac_get_sales_form_types();
if ($form_types) {
    foreach ($form_types as $key => $form) {
        printf('<a class="add-new-h2" href="%s%s" title="%s">%s</a> ', admin_url('admin.php?page=erp-accounting-sales&action=new&type='), $key, esc_attr($form['description']), $form['label']);
    }
}
?>
    </h2>

    <form method="get">
        <input type="hidden" name="page" value="erp-accounting-sales">

        <?php 
$list_table = new WeDevs\ERP\Accounting\Sales_Transaction_List_Table();
$list_table->prepare_items();
$list_table->views();
$list_table->display();
?>
    </form>
</div>
/**
 * Insert a new transaction
 *
 * @param array $args
 */
function erp_ac_insert_transaction($args = [], $items = [])
{
    global $wpdb;
    if (!$items) {
        return new WP_Error('no-items', __('No transaction items found', 'erp-accounting'));
    }
    $defaults = array('id' => null, 'type' => '', 'form_type' => '', 'account_id' => '', 'status' => '', 'user_id' => '', 'billing_address' => '', 'ref' => '', 'issue_date' => '', 'summary' => '', 'total' => '', 'files' => '', 'currency' => '', 'created_by' => get_current_user_id(), 'created_at' => current_time('mysql'));
    $args = wp_parse_args($args, $defaults);
    $table_name = $wpdb->prefix . 'erp_ac_transactions';
    // get valid transaction type and form type
    if (!in_array($args['type'], ['expense', 'sales', 'transfer'])) {
        return new WP_Error('invalid-trans-type', __('Error: Invalid transaction type.', 'erp-accounting'));
    }
    $form_types = $args['type'] == 'expense' ? erp_ac_get_expense_form_types() : erp_ac_get_sales_form_types();
    if ($args['type'] == 'expense') {
        $form_types = erp_ac_get_expense_form_types();
    } else {
        if ($args['type'] == 'transfer') {
            $form_types = erp_ac_get_bank_form_types();
        } else {
            $form_types = erp_ac_get_sales_form_types();
        }
    }
    if (!array_key_exists($args['form_type'], $form_types)) {
        return new WP_Error('invalid-form-type', __('Error: Invalid form type', 'erp-accounting'));
    }
    $form_type = $form_types[$args['form_type']];
    // some basic validation
    if (empty($args['issue_date'])) {
        return new WP_Error('no-issue_date', __('No Issue Date provided.', 'erp-accounting'));
    }
    if (empty($args['total'])) {
        return new WP_Error('no-total', __('No Total provided.', 'erp-accounting'));
    }
    // remove row id to determine if new or update
    $row_id = (int) $args['id'];
    $main_account_id = (int) $args['account_id'];
    unset($args['id']);
    unset($args['account_id']);
    // BEGIN INSERTION
    try {
        $wpdb->query('START TRANSACTION');
        $transaction = new WeDevs\ERP\Accounting\Model\Transaction();
        $trans = $transaction->create($args);
        if (!$trans->id) {
            throw new Exception(__('Could not create transaction', 'erp-accounting'));
        }
        // create the main journal entry
        $main_journal = $trans->journals()->create(['ledger_id' => $main_account_id, 'type' => 'main', $form_type['type'] => $args['total']]);
        if (!$main_journal->id) {
            throw new Exception(__('Could not insert main journal item', 'erp-accounting'));
        }
        // enter the transaction items
        $order = 1;
        $item_entry_type = $form_type['type'] == 'credit' ? 'debit' : 'credit';
        //$item_entry_type = $args['invoice_payment'] ? 'credit' : $item_entry_type;
        foreach ($items as $item) {
            $journal = $trans->journals()->create(['ledger_id' => $item['account_id'], 'type' => 'line_item', $item_entry_type => $item['line_total']]);
            if (!$journal->id) {
                throw new Exception(__('Could not insert journal item', 'erp-accounting'));
            }
            $trans_item = $trans->items()->create(['journal_id' => $journal->id, 'product_id' => null, 'description' => $item['description'], 'qty' => $item['qty'], 'unit_price' => $item['unit_price'], 'discount' => $item['discount'], 'line_total' => $item['line_total'], 'order' => $order]);
            if (!$trans_item->id) {
                throw new Exception(__('Could not insert transaction item', 'erp-accounting'));
            }
            $order++;
        }
        $wpdb->query('COMMIT');
        return $trans->id;
    } catch (Exception $e) {
        $wpdb->query('ROLLBACK');
        return new WP_error('final-exception', $e->getMessage());
    }
    return false;
}