WP-Lister for Amazon 2.8 – Developer Changelog

Jun 19, 2025 | Changelog

New Features

JSON Feeds and Product Types System

  • Added complete support for Amazon’s new Product Type system using JSON-format feeds
  • New Product Types settings tab for managing Amazon Product Types
  • Automatic installation of default “PRODUCT” product type for all supported marketplaces
  • Profile Converter tool for migrating existing listing profiles to Product Types format
  • Listing migration capability to transfer products to converted profiles
  • JSON feed generation with proper schema validation
  • Support for putListingsItem API for creating new listings
  • Form generator for Product Type attribute fields with proper validation

VAT Invoice Data Report

  • Added support for VAT Invoice Data Report to access billing VAT information for European merchants

Settings and Configuration

  • New setting to disable stripping of HTTPS from image URLs
  • New filter: wpla_order_builder_skip_zero_priced_items for controlling zero-priced item handling in orders

Bug Fixes

Order Fulfillment

  • Fixed: Race condition where tracking numbers could be missed during order fulfillment feed submission. Feeds are now immediately marked as “processing” to prevent concurrent updates. (Ticket #65684)

Order Import and API Handling

  • Fixed: Failed API calls during order import now properly trigger throttling behavior, stopping further processing until the next cron run instead of continuing with errors. (Ticket #70380)
  • Fixed: Orders with missing OrderTotal property (replacement orders) no longer cause fatal errors during currency conversion. Added proper validation before accessing order currency. (Ticket #70483)
  • Fixed: Buyer name and email fetching errors during order import process resolved
  • Fixed: NextToken transients now properly cleared after use to prevent pagination issues
  • Fixed: NextToken now correctly linked to the account ID that received it, preventing cross-account issues
  • Fixed: GetOrders calls returning 400 errors now properly clear the NextToken transient

Reports

  • Fixed: Report data downloads from Amazon’s Reports API now use GuzzleHTTP for proper content extraction. Resolves empty Merchant Listings Reports issue. (Ticket #70421)

Installation and Initialization

  • Fixed: Fatal error when initAPI is called without an account configured. Added proper error handling for initial setup scenarios. (Ticket #70568)
  • Fixed: Error during installation of default product types when no account exists. Installation process now gracefully handles missing account configuration. (Ticket #70736)
  • Fixed: Database update version mix-up causing fatal error when creating the amazon_product_types table
  • Fixed: Namespace error when installing default Products product type

JSON Feeds and Product Types

  • Fixed: JSON feeds now properly submitted automatically according to update schedule
  • Fixed: Product Type display names properly saved and displayed
  • Fixed: Variable products now correctly load quantity values in feeds
  • Fixed: Variables now have fixed variable support in Product Type feeds
  • Fixed: Variation theme values properly included in feeds
  • Fixed: Variation theme now properly converted to uppercase as required by Amazon
  • Fixed: Variable listing relationship values correctly populated
  • Fixed: Currency properly included in JSON feeds for all listings
  • Fixed: JSON formatting for purchasable_offer field corrected
  • Fixed: Feed item requirement property correctly set to LISTING_OFFER for PRODUCT product types
  • Fixed: Prices now added to JSON requests as float instead of string type
  • Fixed: ASIN properly included in feeds when required
  • Fixed: Quantity values no longer overwritten by empty values
  • Fixed: UpdateProduct now shows success status only when matching listings are found

Profile and Attribute Handling

  • Fixed: Product attributes now display correctly after converting product-level feed template on Edit Product page
  • Fixed: Profile cloning issue with non-serialized objects resolved
  • Fixed: Handling Time now properly mapped to new profiles during conversion
  • Fixed: Passing serialized profile fields no longer causes errors
  • Fixed: Nested attributes now handled correctly by form generator
  • Fixed: Enum and composite enum schema fields now render as select dropdowns
  • Fixed: Valid values in select elements now render using correct keys
  • Fixed: Type fields (e.g., Unit Count Type) now render properly in form generator
  • Fixed: Invalid value rendering for first option in select boxes corrected
  • Fixed: Multi-select dropdowns now render correctly

Listing Management

  • Fixed: Imported listings now automatically assigned to correct marketplace and product type
  • Fixed: Listings status properly updates to “online” after receiving ASIN
  • Fixed: Only listings without ASIN and “Prepared” status are now enqueued for submission
  • Fixed: ASIN fetching for new listings no longer throws fatal error
  • Fixed: Loop now continues correctly instead of breaking when canSubmitListing returns false
  • Fixed: Check for listing issues bulk action added and working properly
  • Fixed: “No ASIN” view now includes listings with “Submitted” status
  • Fixed: Matching products white screen error resolved
  • Fixed: Error when matching listings corrected with proper string/array handling
  • Fixed: Valid product check added before running parseProfileShortcode

Feed Processing

  • Fixed: Max Feed Size setting now properly checked in JSONFeedBuilder
  • Fixed: Undefined array key “job_name” error eliminated
  • Fixed: Error when accessing string as array resolved
  • Fixed: Fatal error when cancelling feeds corrected
  • Fixed: JSON feed rendering issues resolved – items now display correctly
  • Fixed: Profile migration no longer needs batching for better performance

API and Data Handling

  • Fixed: South Africa marketplace ID added to marketplace list
  • Fixed: Marketplace selection limited to only supported marketplaces
  • Fixed: Product Type loading error when property groups are missing
  • Fixed: Valid properties for parent variables updated to current Amazon requirements
  • Fixed: Merchant ID now passed when loading JSON schema for proper shipping template access
  • Fixed: Item Conditions dropdowns updated to use new Amazon values

User Interface

  • Fixed: Sandbox flag now displays correctly
  • Fixed: Product Types label no longer shows as “undefined”
  • Fixed: Unmapped field link hidden when no unmapped fields available
  • Fixed: Fields needing mapping now only show if they have actual values
  • Fixed: Feed Details display tweaks for better readability
  • Fixed: MessageId now displayed in block title of JSON Feed Details page
  • Fixed: MessageId mapped to SKU and displayed in Errors table of JSON Feed page
  • Fixed: SKU now shows in Errors table for better debugging
  • Fixed: Results popup for JSON Feeds corrected
  • Fixed: JSON feed details view error resolved
  • Fixed: Announcements no longer display during ajax and cron runs
  • Fixed: Order page warnings about accessing ID property incorrectly resolved

Code Quality and Technical Fixes

  • Fixed: Translation-related warnings eliminated by moving handleSubmit to init event
  • Fixed: Duplicate Product Types installation prevented
  • Fixed: Various code warnings addressed
  • Fixed: Blocking and unblocking of elements in Profile form corrected
  • Fixed: Encoding issues resolved
  • Fixed: Fatal error in method_exists() eliminated
  • Fixed: Incorrect namespace when calling WP_Filesystem() corrected
  • Fixed: WP_Filesystem() availability ensured by loading file.php
  • Fixed: Unnecessary call to wp_enqueue_emoji_styles() removed
  • Fixed: Code cleanup in FeedPage::updateFeedStatus method
  • Fixed: Security fixes – missing capabilities check added in AjaxHandler methods

Improvements

  • Improved: Report processing now uses faster fgets instead of fgetcsv for better performance
  • Improved: ActionScheduler actions now grouped using ‘WPLA’ for better organization
  • Improved: Field phrasing updated for better clarity on fields needing mapping
  • Improved: Warning messages for Profile Converter tool improved
  • Improved: Expert mode temporarily disregarded for product type attributes for better usability
  • Improved: Persistent messaging support added to WPLA_AdminMessages
  • Improved: Item Conditions dropdowns updated with new valid values from Amazon
  • Improved: Clear existing issues prior to checking for new ones

Developer Notes

  • Composer packages updated
  • Removed unnecessary validation elements from schemas
  • Added ProfileProductTypeConverter class for template field conversion
  • Renamed JSON Feed Data Builder and Form Generator classes for consistency
  • Removed unnecessary files from includes/amazon/vendor directory
  • Removed unnecessary aws-sdk library
  • Added back missing non-prefixed SP-API fields required by OrderBuilder class
  • FBA Channel Code duplication addressed
  • Feed Data Format setting removed as unnecessary
  • .gitignore updated

Important Notes

  • VAT Invoice Data Report temporarily disabled due to throttling issue – will be re-enabled in future update
  • The new Product Type system is optional – existing listings continue to work with current feed system
  • Profile migration is a one-way process – test on staging site first
  • JSON feeds use different validation than XML feeds – some field mappings may need adjustment