Open Source Release
36 lines
2.1 KiB
SQL
36 lines
2.1 KiB
SQL
-- +goose Up
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-- Identifies one physical, recurring-service cartridge across visits — the
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-- thing a QR-code label gets stuck onto. Deliberately its own row rather
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-- than reusing the (client_id, model, color) grouping cartridge_items'
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-- Suggest() already surfaces: that grouping is explicitly a soft hint (see
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-- 003_cartridges.sql's own doc comment — a client with a fleet of ten
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-- identical cartridges would otherwise be indistinguishable). Printing a
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-- QR onto one physical unit and scanning it back is exactly what makes the
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-- identity unambiguous, so this table's row IS that identity, not a
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-- lookup convenience.
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CREATE TABLE cartridge_recurring_items (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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client_id UUID NOT NULL REFERENCES clients(id) ON DELETE RESTRICT,
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cartridge_brand_id UUID REFERENCES cartridge_brands(id),
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cartridge_model_id UUID REFERENCES cartridge_models(id),
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model TEXT NOT NULL,
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color TEXT NOT NULL DEFAULT 'black',
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-- Plain text, not a UUID — printed as a QR and also typeable by hand as
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-- a fallback if a scan fails. 8 chars from an unambiguous alphabet
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-- (excludes 0/O, 1/I/L) generated in Go, see internal/cartridge/recurring.go.
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code TEXT NOT NULL UNIQUE,
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created_by_staff_id UUID NOT NULL,
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created_by_staff_name TEXT NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
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);
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CREATE INDEX cartridge_recurring_items_client_id_idx ON cartridge_recurring_items (client_id);
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-- Nullable: only cartridges someone bothered to label carry this link. A
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-- repeat visit for the same physical cartridge reuses the same
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-- recurring_item_id (see internal/cartridge/handler.go's Create), so this
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-- column is what actually chains cartridge_items rows into one item's
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-- history, not the (client_id, model, color) grouping.
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ALTER TABLE cartridge_items ADD COLUMN recurring_item_id UUID REFERENCES cartridge_recurring_items(id);
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CREATE INDEX cartridge_items_recurring_item_id_idx ON cartridge_items (recurring_item_id) WHERE recurring_item_id IS NOT NULL;
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