feat: add piece_count and piece_size fields to BomItem for cut-to-length parts#12422
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feat: add piece_count and piece_size fields to BomItem for cut-to-length parts#12422amanjain57-gif wants to merge 1 commit into
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…gth parts Manufacturing BOMs frequently require multiple pieces of a specific size cut from continuous stock (cables, tubing, structural profiles). Currently the only way to express "10 pieces of 250mm cable" is to enter the total length (2.5m) as quantity, which loses the piece-count information that purchasing and production need. This adds two optional fields to BomItem: - piece_count: number of discrete pieces required (default: 1) - piece_size: size/length of each piece (e.g. "250 mm") When piece_size is specified, the total quantity is auto-calculated as piece_count × piece_size, maintaining full backward compatibility (existing items effectively have piece_count=1 and empty piece_size). Changes: - Backend: new model fields, migration, updated recalculate_quantity() logic, hash_fields for BOM validation - API: serializer exposes piece_count and piece_size - Frontend: BOM form includes the new fields, BOM table shows them as optional columns Addresses inventree#10274
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Summary
Addresses #10274
Manufacturing BOMs frequently require multiple pieces of a specific size cut from continuous stock (cables, tubing,
structural profiles). Currently the only way to express "10 pieces of 250mm cable" is to enter the total length (2.5m)
as quantity, which loses the piece-count information that purchasing and production need.
Changes
Adds two optional fields to BomItem:
When
piece_sizeis specified, the total quantity is auto-calculated aspiece_count × piece_size, maintaining fullbackward compatibility (existing items effectively have piece_count=1 and empty piece_size).
Backend
recalculate_quantity()to compute total from piece_count × piece_size when piece_size is setAPI
piece_countandpiece_sizefieldsFrontend
Example
A BOM line for "10 pieces of 250mm aluminum profile" (part units: m):
This preserves the per-piece information for production while correctly computing total material requirement for
purchasing.