Migrating an eCommerce store is not as simple as transferring data from one platform to another, even for developers, especially when they must manage highly customized product structures and navigate unexpected technical obstacles. This is exactly what happened to Akshay Sihag, an Indian developer who reached us for his migration from OpenCart products to WooCommerce.
Akshay used Next-Cart’s 100-Entity Migration Plan and expected a straightforward transfer process. However, he encountered one of the most complex scenarios: tens of thousands of variant combinations. This number exceeded WooCommerce’s variation limits and was unsupported by custom fields.
Below is a complete story of how Next-Cart worked alongside Akshay, analyzing, customizing, and refining the migration tool to help Akshay obtain a fully functional result.
When variable products become simple products - The issue of missing variations
Extraordinarily high number of variant combinations
Many products on the OpenCart site were variable products, each containing multiple groups with various values. These values were combined to form individual variants with their own pricing. After the migration, these variant products appeared in WooCommerce as simple products with only basic attributes. Still, they did not display actual variations: missing pricing, variant combinations, and the entire structure.
Right after Akshay ran the first migration, he realized this issue. At first, Akshan suspected this was due to a migration error and reached out to the Next-Cart support team.
In response, Next-Cart’s technician, Harry Dang, immediately requested admin logins, ePanel access, and sample product URLs to investigate the situation directly. When Harry examined the product structure, he discovered the extraordinarily high number of variant combinations.
The problem was most visible in the “Melt Burners Blue” product category, which contained four option groups: Fragrance (21 values), Cubes Addition (11 values), Heart Cubes Addition (11 values), and Tealight Candle (11 values). When multiplied, these option groups produced 27,951 possible variation combinations. Each variation had the same amount of data as a simple product, so it's too heavy.
Resolve limitations of the WooCommerce system
WooCommerce is so far well-known for its limitations in handling large variation sets, often failing to create more than a few thousand variations. As a result, WooCommerce simply skipped creating the variants; instead, it imported single products without variations.
Upon becoming aware of the situation, Harry explained to Akshay that the issue was not a migration malfunction but a limitation of the WooCommerce platform. In other words, there was no tool, either manual or automated, that could generate tens of thousands of variations without compromising performance.
Once Akshay understood the real cause, Next-Card proposed a better long-term solution: instead of working only on the WooCommerce system, shift all product options to the WooCommerce Extra Product Options plugin. This plugin allows options to function at the product level rather than as variants. That would eliminate the need to generate thousands of combinations, thereby avoiding overload from large variant sets. At the same time, this solution helped to preserve the user-selectable options.
For Akshay, this solution was the ultimate, as it immediately addressed WooCommerce’s structural limitations that prevented variations from migrating correctly.
The custom field challenge: Migrating Data Selectors and Textareas
How to migrate unsupported fields?
Once the variation overload was resolved, the second challenge emerged. In the OpenCart store, products used custom fields, such as Date Selector and Textarea, as standard, frequently used input types. Meanwhile, WooCommerce did not support these fields natively. Instead, its core product system only recognizes Select and Ratio types. As a result, Date and Textarea fields had no direct equivalent in WooCommerce.
When Akshay asked Next-Cart about how these fields could be migrated, Harry explained WooCommerce’s native structure. If he wanted to preserve these field types to maintain an identical customer experience after moving to WooCommerce, the team suggested an additional solution.
Fortunately, the Extra Product Options plugin fully supported a wide range of inputs, including date selectors, text fields, and multi-line textareas. As the migration used the Extra Product Options plugin to move product options, Next-Cart could map the Date and Textarea fields directly to the plugin’s supported field types.
Rewrote the tool for the full migration
Next-Cart also communicated transparently a required customization fee for implementing this specialized mapping, as the default migration tool needed additional logic to handle these non-standard field types. Akshay was willing to pay this fee as he recognized the essence of accurately preserving these fields for his clients.
With the strategy in place, the Next-Cart team prepared to customize the migration tool. The team rewrote the tool to interpret OpenCart option structures and remap them to the plugin’s data format.
After the first customization, Harry performed a test migration for one product and shared the result with Akshay, in which all options successfully transferred to the plugin, and the data appeared clean and functional. Akshay enthusiastically confirmed and ran the full migration.
Rebuild the migration logic for full access and technical customization
To further diagnose and rebuild the migration structure, Next-Card requested administrative and server access so that the technicians could inspect how the existing product data was migrated and stored. The team analyzed the OpenCart product architecture, option groups, values, and custom field types within each group.
Next-Cart then advised Akshay to clear all WooCommerce product data to ensure that old test migrations would not interfere with the upgraded logic, enabling a clean migration.
Once the store was ready, the team began rewriting parts of the migration tool to support the new mapping strategy.
A new problem with the incorrect dropdown conversion
After the first customized migration, the results were close to expectations, but not perfect. Akshay discovered that the Date and Textarea fields were imported as dropdown menus rather than allowing users to enter a message in a multiline text area or select a date using a date picker. While the products were functional, they did not match the original product behavior.
Upon receiving Akshay's feedback and recognizing the importance of preserving precise field types, the team took immediate action. First, they asked Akshey to create a database backup before any further changes to protect the migrated site. Afterward, they returned to the customized migration logic and reviewed how the custom fields were integrated in the OpenCart store.
The team then realized that the mapping logic needed stricter rules to differentiate between field types and to ensure consistent Date and Textarea types. The plugin required a specific field type designation for Date and Textarea fields. They rewrote the mapping system to ensure that every Date Selector from OpenCart would import as a proper Date field and every Textarea would remain a Textarea.
Next-Cart then performed a second customization to ensure Date Selector fields remained Date fields and Textarea fields remained Textareas. At the end, each field type was mapped with 100% accuracy, and no custom fields would default to a dropdown.
After completing the update, Next-Cart ran a test migration for a sample product and sent the results to Akshay for verification. This product displayed all custom fields in their correct format, and Akshay was delighted.
Final migration and full completion
With the updated logic, the tool was thoroughly refined and adjusted to match the exact requirements and was fully ready for a complete migration. The Next-Cart team instructed him to rerun the migration, using the option “Clear data on Target store before Migration” to overwrite all previous test attempts and include only the final corrected mapping.
Throughout the final migration, Harry and Next-Cart’s team remained available to monitor the process. When the import finished, Akshay reviewed the entire migrated store and confirmed everything looked perfect. All product options were visible, fully functional, and correctly structured on the WooCommerce site.
For Akshay and his client, the migration was now complete, accurate, and operational.
What Akshey’s case teaches about complex migrations
This case demonstrates that not all migrations are the same, especially those involving thousands of potential product variants, unsupported field types, and complex option architectures. Then, the process demands much more than a simple automated tool.
Through Akshay’s experience and success, Next-Cart is strong at combining technical skills and flexibility to deliver the best results for each project. We can resolve massive variation overload, map non-standard fields, and integrate and customize third-party plugins.
For developers and store owners handling complex product data, Next-Cart can help them go through the migration process with precision and reliability.
