Harbor Equipment Rental for WooCommerce

FAQ

Does this work with variable products?

Not in v1.0. Rental is supported on simple products only. Variable product support is planned for a future release.

Does it support HPOS (High-Performance Order Storage)?

Yes. The plugin declares full HPOS compatibility and uses $item->add_meta_data() throughout — it does not rely on add_order_item_meta() or WP_Query for order lookups.

Can I display an availability calendar on the front end?

A [wcrent_calendar] shortcode is included in the Pro plan. The free version greys out unavailable dates directly in the Flatpickr date picker on the product page.

Where are rental dates stored?

As line item meta on the WooCommerce order (_rental_start, _rental_end, _rental_days). They are visible in the order detail screen and surfaced in customer emails.

How is tax applied to rental prices?

Rental rates follow your store’s existing tax settings, exactly like any other WooCommerce product price. Enter your per-day, per-hour, or per-week rates the same way you enter product prices: if WooCommerce > Settings > Tax is set to “prices entered inclusive of tax,” your rental rates are treated as tax-inclusive; otherwise tax is added on top at checkout. Tax is always calculated against the full rental total (rate multiplied by duration).

What happens if two customers try to book the same dates?

Availability is validated server-side at three points: when each customer clicks Add to cart, again at checkout (on both the classic and block-based checkout), and a final authoritative check under a database lock at the moment the order is created. If two customers race for the last unit in the same instant, exactly one order succeeds and the other is stopped with an error before any payment is taken — the same equipment can never be double-booked.

This works out of the box on standard single-primary MySQL/MariaDB hosting (virtually all WooCommerce sites). The one-winner guarantee comes from an atomic booking sequence assigned under a database advisory lock that serializes concurrent checkouts: the first order to complete the final check wins, and every later one sees it and is rejected. On multi-writer clusters (Galera, Aurora multi-writer) the advisory lock is not globally coordinated; enable causal reads (e.g. wsrep_sync_wait) or route writes to a single primary. The lock timeout and use are adjustable via the wcrent_booking_lock_timeout and wcrent_use_booking_lock filters.

Is Flatpickr bundled or loaded from a CDN?

Bundled locally (assets/flatpickr.min.js, v4.6.13, MIT licence). No external requests are made for any booking, pricing, or availability feature.

Does the plugin send any data externally?

Booking, order, and customer data never leave your site — every availability and pricing query runs against your own WordPress database. The plugin uses the Freemius SDK for licensing and updates: on activation you are shown a one-time opt-in screen, and if you skip it no diagnostic data is collected. If you opt in, Freemius collects non-personally-identifiable environment data (site URL, WordPress version, PHP version, plugin version) for update delivery and, where applicable, license validation. No order data, customer data, or personally identifiable information is transmitted. See the Freemius privacy policy.