Add budgeting

postgres/categories.sql.go

@@ -90,11 +90,25 @@ func (q *Queries) GetCategories(ctx context.Context, budgetID uuid.UUID) ([]GetC
 }
 
 const getCategoriesWithBalance = `-- name: GetCategoriesWithBalance :many
-SELECT categories.id, categories.name, category_groups.name as group, SUM(t_hist.amount)::decimal(12,2) as balance, SUM(t_this.amount)::decimal(12,2) as activity
+SELECT categories.id, categories.name, category_groups.name as group, 
+    COALESCE(
+        (
+            SELECT SUM(t_hist.amount)
+            FROM transactions t_hist
+            WHERE categories.id = t_hist.category_id 
+            AND t_hist.date < $1
+        )
+    , 0)::decimal(12,2) as balance, 
+    COALESCE(
+        (
+            SELECT SUM(t_this.amount)
+            FROM transactions t_this
+            WHERE categories.id = t_this.category_id 
+            AND t_this.date BETWEEN $1 AND $2
+        )
+    , 0)::decimal(12,2) as activity
 FROM categories
 INNER JOIN category_groups ON categories.category_group_id = category_groups.id
-INNER JOIN transactions t_hist ON categories.id = t_hist.category_id AND t_hist.date < $1
-INNER JOIN transactions t_this ON categories.id = t_this.category_id AND t_this.date >= $1 AND t_this.date < $2
 WHERE category_groups.budget_id = $3
 GROUP BY categories.id, categories.name, category_groups.name
 `