feat(purchasae): added team with category parent and central

migrations/000085_add_team_to_purchase_orders.down.sql

@@ -0,0 +1,12 @@
+DROP INDEX IF EXISTS idx_purchase_orders_team_scope;
+DROP INDEX IF EXISTS idx_purchase_orders_team_category_id;
+
+ALTER TABLE purchase_orders
+    DROP CONSTRAINT IF EXISTS chk_purchase_orders_team;
+
+ALTER TABLE purchase_orders
+    DROP CONSTRAINT IF EXISTS fk_purchase_orders_team_category;
+
+ALTER TABLE purchase_orders
+    DROP COLUMN IF EXISTS team_category_id,
+    DROP COLUMN IF EXISTS team_scope;

migrations/000085_add_team_to_purchase_orders.up.sql

@@ -0,0 +1,33 @@
+-- A purchase is charged either to a team (a parent product category) or to Pusat.
+-- Pusat has no category of its own, so it is stored as a scope rather than a row;
+-- which outlet's Pusat it is comes from purchase_orders.outlet_id.
+-- team_scope IS NULL means the team was never chosen, which is deliberately
+-- distinct from a purchase that belongs to Pusat.
+ALTER TABLE purchase_orders
+    ADD COLUMN IF NOT EXISTS team_scope VARCHAR(20),
+    ADD COLUMN IF NOT EXISTS team_category_id UUID;
+
+ALTER TABLE purchase_orders
+    ADD CONSTRAINT fk_purchase_orders_team_category
+        FOREIGN KEY (team_category_id) REFERENCES categories(id) ON DELETE RESTRICT;
+
+-- Deleting a category that is still charged on a purchase order must fail rather
+-- than silently drop the attribution, hence RESTRICT above and this pairing check.
+-- Written as a CASE because an OR chain would evaluate to NULL when team_scope is
+-- NULL, and a CHECK only rejects FALSE — a stray team_category_id would slip past.
+ALTER TABLE purchase_orders
+    ADD CONSTRAINT chk_purchase_orders_team
+        CHECK (
+            CASE
+                WHEN team_scope IS NULL      THEN team_category_id IS NULL
+                WHEN team_scope = 'category' THEN team_category_id IS NOT NULL
+                WHEN team_scope = 'central'  THEN team_category_id IS NULL
+                ELSE false
+            END
+        );
+
+CREATE INDEX IF NOT EXISTS idx_purchase_orders_team_category_id
+    ON purchase_orders(team_category_id);
+
+CREATE INDEX IF NOT EXISTS idx_purchase_orders_team_scope
+    ON purchase_orders(team_scope);