Purchase Requisition Multiple Vendor

When you use the 'Create Alternative' wizard on a purchase requisition, this module replaces the single vendor field with a multi-vendor field called Partners, where you can select as many vendors as you want.

• The first selected vendor is used as the main vendor of the wizard; the others are treated as additional alternatives.
• When you confirm, Odoo creates one alternative purchase order for each selected vendor, all linked to the same original purchase order.
• After creation, Odoo opens a list of the newly created alternative purchase orders so you can review them.
• If only one vendor is selected, the standard behaviour of the original wizard is kept.

It also checks vendor purchase warnings: if any of the selected vendors (other than the main one) has a blocking warning, the wizard shows the warning message and blocks the creation with an error. This check only applies to users who belong to the purchase warning group.

The module works on the purchase.requisition.create.alternative wizard and creates records in purchase.order. It does not add new menus; it changes the existing alternative-creation form.