When one customer generates several quotations or confirmed sales orders across different reps, dates, or entry points, your team ends up manually re-keying lines into one document, chasing duplicate discounts, and reconciling deliveries and invoices that should have been a single transaction. Odoo core has no native "combine these orders into one" action: sale.order records are independent, quotations do not roll up, and the closest workarounds — copy-pasting order lines or leaning on blanket orders — lose the link back to the originals and quietly break your audit trail. This is exactly where standard Odoo runs out of road, and where a purpose-built merge capability pays for itself.

We build a made-to-order module that adds a controlled Merge action to the sale.order model. You select two or more source quotations or orders for the same customer, and the module creates one consolidated sale.order whose lines are copied — and optionally combined — from the sources, preserving product_id, product_uom, unit price, discount, taxes, and analytic distribution. A server-side layer (with @api.depends-driven computes where recalculation is needed) can deduplicate identical product lines by summing quantities, or keep them itemized per your rule, and it validates that currency, pricelist, company, and fiscal position are compatible before anything is written. Each merged document carries Many2one/Many2many back-references to its sources, so the merge is always traceable and, where your process requires it, reversible.

Technically, the capability is delivered as a proper Odoo addon: a clean __manifest__.py declaring dependencies (sale, sale_management), models extending sale.order and sale.order.line, a TransientModel wizard for the merge selection and options, and QWeb-inspired button placement in the form and list views (XML/OWL) so the action sits naturally in the interface your team already uses. Access is governed by ir.model.access.csv plus record rules so only authorized roles can merge, and multi-company record rules keep the action inside the right company boundary. We wire the merged order into the standard delivery and invoicing flow so a single consolidated document drives one picking and one invoice, and we can expose the merge over the XML-RPC/JSON-RPC API for upstream systems that need to trigger consolidation programmatically. The module is built and tested for Odoo 17.0, 18.0, and 19.0, on Community or Enterprise, with the differences (for example Enterprise-only studio or subscription touchpoints) handled explicitly during scoping.

Delivery is build-to-order: after a short scoping call we confirm the exact merge rules, roles, and edge cases, then build against a staging copy of your database, run UAT with your team, and deploy with a rollback plan. Typical delivery is 2–4 weeks from confirmed scope. Pricing starts from $249 (indicative, single-company base scope); multi-company consolidation, additional integrations (delivery/invoicing automation, external system triggers), localization depth, and data-migration volume increase the quoted scope. You receive a firm fixed quote after the scoping call — never a surprise.