product quantity

repositories/productRepository.go

@@ -409,12 +409,20 @@ func (r *productRepository) GetLocationProducts(tenantID, locationID, subcategor
 	// a.* only covers products (whose price column is retailprice, the master
 	// price), so without this the catalogue could never read back a price set
 	// for this outlet via CreateProductLocation.
+	// quantity/productstock both alias the same live SUM(in)-SUM(out) balance
+	// from productstocks — placed after a.* so they overwrite the static,
+	// never-decremented products.quantity column GORM would otherwise scan
+	// into Locationproducts.Quantity, which is what made the console's stock
+	// column look frozen after an order despite CreateOrder recording the
+	// "out" ledger entry correctly.
 	query := `SELECT a.*, b.productlocationid, b.status, b.price,
 			  COALESCE(SUM(CASE WHEN UPPER(c.stocktype) = 'IN' THEN c.quantity ELSE 0 END), 0) AS total_in,
     		  COALESCE(SUM(CASE WHEN UPPER(c.stocktype) = 'OUT' THEN c.quantity ELSE 0 END), 0) AS total_out,
-    		  COALESCE(SUM(CASE WHEN UPPER(c.stocktype) = 'IN' THEN c.quantity ELSE 0 END) - 
+    		  COALESCE(SUM(CASE WHEN UPPER(c.stocktype) = 'IN' THEN c.quantity ELSE 0 END) -
-              SUM(CASE WHEN UPPER(c.stocktype) = 'OUT' THEN c.quantity ELSE 0 END), 0) AS productstock 
+              SUM(CASE WHEN UPPER(c.stocktype) = 'OUT' THEN c.quantity ELSE 0 END), 0) AS productstock,
-              FROM products a 
+    		  COALESCE(SUM(CASE WHEN UPPER(c.stocktype) = 'IN' THEN c.quantity ELSE 0 END) -
+              SUM(CASE WHEN UPPER(c.stocktype) = 'OUT' THEN c.quantity ELSE 0 END), 0) AS quantity
+              FROM products a
               INNER JOIN productlocations b ON a.productid = b.productid AND a.tenantid = b.tenantid
 			  LEFT JOIN productstocks c ON a.productid = c.productid AND b.locationid = c.locationid AND a.tenantid = c.tenantid  
               WHERE a.approve=1 AND a.tenantid = ? AND b.locationid = ?`
@@ -593,12 +601,15 @@ func (r *productRepository) GetProductByVariant(tenantid, variantid, locationid
 
 	var data []models.Products
 
-	// productstock is a correlated subquery (not a JOIN+GROUP BY) so it can
+	// productstock/quantity are correlated subqueries (not a JOIN+GROUP BY) so
-	// coexist with `p.*` without having to enumerate every products column.
+	// they can coexist with `p.*` without having to enumerate every products
-	// When locationid is 0 (caller didn't scope to a store), both the
+	// column. quantity is duplicated on purpose: it's placed after `p.*` so it
-	// subquery and the productlocations join simply match nothing, so
+	// overwrites the static, never-decremented products.quantity column that
-	// Productstock/Locationstatus come back zero-valued — same response
+	// would otherwise scan into Products.Quantity. When locationid is 0
-	// shape as before this field existed, not an error.
+	// (caller didn't scope to a store), both subqueries and the
+	// productlocations join simply match nothing, so
+	// Productstock/Quantity/Locationstatus come back zero-valued — same
+	// response shape as before this field existed, not an error.
 	err := r.db.
 		Table("products p").
 		Select(`
@@ -613,8 +624,14 @@ func (r *productRepository) GetProductByVariant(tenantid, variantid, locationid
 				       SUM(CASE WHEN LOWER(ps.stocktype) = 'out' THEN ps.quantity ELSE 0 END)
 				FROM productstocks ps
 				WHERE ps.productid = p.productid AND ps.tenantid = p.tenantid AND ps.locationid = ?
-			), 0) AS productstock
+			), 0) AS productstock,
-		`, locationid).
+			COALESCE((
+				SELECT SUM(CASE WHEN LOWER(ps.stocktype) = 'in' THEN ps.quantity ELSE 0 END) -
+				       SUM(CASE WHEN LOWER(ps.stocktype) = 'out' THEN ps.quantity ELSE 0 END)
+				FROM productstocks ps
+				WHERE ps.productid = p.productid AND ps.tenantid = p.tenantid AND ps.locationid = ?
+			), 0) AS quantity
+		`, locationid, locationid).
 		Joins("LEFT JOIN productcategories c ON p.categoryid = c.categoryid").
 		Joins("LEFT JOIN productsubcategories d ON p.subcategoryid = d.subcatid").
 		Joins("LEFT JOIN productdiscounts pd ON pd.productid = p.productid").