Features

• Auto SGR child line on every PO line — adding a beverage with an sgr_product_id to a purchase order instantly appends a paired purchase.order.line with the matching SGR product, the deposit rate effective on date_order and zero taxes.
• Parent/child sync — quantity, product and UoM changes on the parent propagate to the SGR child; removing the parent cascades to the child via ondelete='cascade'.
• No duplication on cross-module flows — if the line was created by an upstream sync that already carries an SGR sibling, the module links it via sgr_parent_line_id instead of creating a duplicate.
• Separate stock moves on receipt — the beverage and its SGR packaging come in on independent stock moves so reorder rules and on-hand quantities of empties are accurate.
• Vendor-bill propagation — _prepare_account_move_line carries is_sgr_line=True to the resulting bill line, so the SGR line is recognized by nexterp_sgr_account and adopted instead of duplicated.
• Per-PO opt-out — purchase.order.sgr_auto_lines adds an Auto-add SGR Lines boolean after Vendor Reference, defaulting from the company setting. Disable when the SGR line is already in the vendor catalog or upstream EDI feed.
• Tracks the SGR pair — is_sgr_line and sgr_parent_line_id fields on purchase.order.line make deposits easy to filter, group and report on.

Configuration

1. Link beverage products to their SGR companion

On each beverage SKU subject to SGR, open the product in Inventory → Products and set the SGR Deposit field to the matching SGR product (the one carrying the correct category — Glass Small, Plastic Large, Metal, etc.). This is the standard field provided by nexterp_sgr; the purchase module does not add a new field on the product itself.

From that moment on, every purchase line referencing this beverage will receive an automatic SGR child line.

2. Default behavior on new POs

Every purchase.order carries an Auto-add SGR Lines boolean displayed after the Vendor Reference field on the order form. It defaults from the company-wide setting found at Settings → Inventory → SGR → Auto-add SGR Lines.

• Keep it enabled for hand-keyed POs and orders generated by reordering rules — the SGR child line will be added under each beverage line automatically.
• Disable it on POs whose lines come pre-populated with SGR rows from an EDI feed, a vendor catalog import or any upstream system. The orphan SGR sibling is then adopted by its parent line on save, without creating a duplicate.

3. Account flow on the vendor bill

If nexterp_sgr_account is installed and the company SGR Liability Account (462 / 461) is configured, the SGR component on the resulting bill posts to the liability account instead of the regular expense account — keeping the deposit out of the P&L. Nothing extra to set here, the propagation happens through _prepare_account_move_line.

How it works

Creating a PO with beverages

1. Create a purchase order and add one or more beverage products subject to SGR.
2. As each beverage line is saved, an SGR child line is appended under it with the matching SGR product, the deposit rate effective on the order date as Unit Price and zero taxes.
3. Change the parent line quantity, product or UoM — the SGR child follows. Remove the parent — the SGR child is removed automatically.
4. Confirm the PO and plan the reception normally.

Receiving the goods

On reception, the beverage and its SGR packaging land in stock as two separate stock moves, even when they were on a single PO line pair:

• The beverage hits the warehouse input location like any other good.
• The SGR product hits the same destination but on its own move, so the on-hand quantity of empties stays accurate and visible.

This is exactly what is needed for SGR reporting — the two products have to be tracked independently because their stock will diverge as soon as consumer returns start (empties come back; beverages don't).

Vendor bill

When the vendor bill arrives — either through e-factura import or as a manual entry — both the beverage and the SGR line carry over with the deposit on a non-taxable line. If nexterp_sgr_account is also installed, the SGR line is recognized and linked to its parent via sgr_parent_line_id, so the bill never duplicates the deposit.

Opt-out per PO

If a vendor's catalog already includes the SGR row on every beverage line, untick Auto-add SGR Lines on the PO header. The module then leaves the upstream lines alone and only attaches orphan SGR siblings to their parent beverage lines for traceability.

Versions

19.0.1.0.0 (2026-05-25)

• Changelog tracking starts at this release.