Net Weights in the invoices analysis view

This module extends the invoices analysis report in Odoo with an extra measure called Net Weight. Once installed, when you open the invoices analysis view (the pivot/graph report built on account.invoice.report), you can select Net Weight as a measure and see the total net weight of the products behind your invoice lines.

The weight is taken from the net weight stored on each product and adjusted for the unit of measure used on the invoice line, so lines sold in a different unit than the product's reference unit are converted correctly. The sign of the amount follows the document type: vendor bills, customer refunds and incoming receipts are counted as negative, while customer invoices and other documents are counted as positive. This keeps the totals consistent with the usual accounting direction of the report.

• New measure available in the invoices analysis view: Net Weight.
• Weight comes from the product's net weight field.
• Unit of measure conversion is applied automatically.
• Vendor bills and customer refunds reduce the total.

The module depends on sale and on the product net weight module, and only touches the account.invoice.report model. It does not add menus, buttons, scheduled actions or emails; it simply enriches the existing analysis report with one more column/measure.