Add on_budget query to transactions_by_month

postgres/schema/0019_ignore-off-budget-in-transactions-by-month.sql

@@ -0,0 +1,13 @@
+-- +goose Up
+CREATE OR REPLACE VIEW transactions_by_month AS 
+        SELECT date_trunc('month', transactions.date)::date as date, transactions.category_id, accounts.budget_id, SUM(amount) as amount
+        FROM transactions
+        INNER JOIN accounts ON accounts.id = transactions.account_id AND accounts.on_budget
+        GROUP BY date_trunc('month', transactions.date), transactions.category_id, accounts.budget_id;
+
+-- +goose Down
+CREATE OR REPLACE VIEW transactions_by_month AS 
+        SELECT date_trunc('month', transactions.date)::date as date, transactions.category_id, accounts.budget_id, SUM(amount) as amount
+        FROM transactions
+        INNER JOIN accounts ON accounts.id = transactions.account_id
+        GROUP BY date_trunc('month', transactions.date), transactions.category_id, accounts.budget_id;