Checkout Update Bugfix for OpenCart 4

This extension fixes critical bugs in OpenCart 4's checkout process that prevent proper order updates and cause data loss during checkout operations. Fixes OpenCart 4 checkout bugs that prevent order updates after confirmation and missing field updates in editOrder method.

Problems Solved

1. Order Update Prevention Bug

Issue: Orders cannot be updated after the first confirmation click due to incorrect status checking logic.

Root Cause: The confirm method contains this problematic condition:

} elseif ($order_info && !$order_info['order_status_id']) {
    $this->model_checkout_order->editOrder($order_id, $order_data);
}

When a customer first clicks "Confirm Order", the order gets a "voided" status. If they go back and modify something (shipping method, payment method, currency etc.) and click confirm again, the order won't update because order_status_id is no longer 0.

Solution: Reset the order status to 0 before the confirm process, allowing updates to proceed normally.

2. Incomplete Field Updates in editOrder

Issue: The editOrder method doesn't update all order fields in the database.

Missing Fields:

• marketing_id
• tracking
• language_id
• language_code
• currency_id
• currency_code
• currency_value
• ip
• forwarded_ip
• user_agent
• accept_language

Solution: Execute an additional SQL query after the original editOrder method to update the missing fields.

Technical Implementation

Event-Based Approach

This extension uses OpenCart's event system to fix the bugs without modifying core files:

1. Before Checkout/Confirm Event: Resets order status to allow updates
2. After editOrder Event: Updates missing fields with additional SQL query

Benefits

• No core file modifications - uses only events
• Update-safe - won't be overwritten by OpenCart updates
• Easy installation/removal - standard extension format
• Minimal performance impact - only triggers when needed

Compatibility

• OpenCart Version: up to 4.1.0.3

Use Cases

This fix is essential for stores where customers:

• Frequently change shipping/payment methods during checkout
• Use multiple currencies or languages
• Need accurate tracking and marketing attribution
• Require complete order data for integrations

This extension addresses documented bugs in OpenCart 4's checkout process. It's recommended for all OpenCart 4 installations to ensure proper checkout functionality.