Stock Picking Operation Manual Lot Selection

This module adds a new setting called "Manual Production Lot Selection" on operation types (for example Receipts, Delivery Orders, Internal Transfers). When it is switched on, the normal Lot/Serial Number field is hidden on the transfer lines and replaced by a separate "Lot" field that the user must fill in by hand.

• On the operation type form and list, a checkbox controls the behaviour.
• On transfer lines, the manual Lot field only appears when the option is active; the standard lot field is hidden instead.
• The manual lot list is filtered to lots belonging to the same product and company, so users cannot pick a lot from another product.
• Choosing a value in the manual field automatically fills the standard Lot/Serial Number field.

When the user tries to validate the transfer, Odoo checks every line where the option is active, the product is tracked, and a done quantity was entered. If any such line has no manual lot, validation is blocked with an error listing the affected products. Products that are not tracked are ignored.

The module touches stock.picking.type, stock.picking and stock.move.line, and adds columns and fields to the operation type list, the operation type form, the transfer form and the detailed operations screens.