How Product Inactivation Rules Work

Source: products_controller.rb:218-221, products_controller.rb:595-604, product.rb:7

A product cannot be made inactive if it is used in any active bundle (BOM) -- the system checks all BomItems referencing the product
A product cannot be made inactive if it is referenced by a default company setting (e.g., default labour product, default vehicle sale product)
Product type cannot be changed to labor if quantity_on_hand is non-zero -- you must zero out stock first
Inactive products are hidden from all standard queries by the default scope, just like deleted products
Reactivation uses an unscoped query to locate the hidden product and set inactive back to false

"Why can't I make this product inactive?" → It is used in an active bundle or referenced by a default company setting
"Why can't I change my product type to Labour?" → The product still has stock on hand; set quantity to zero first
"Product disappeared after I made it inactive" → The default scope hides inactive products from normal searches; use the reactivate function to bring it back