Initial commit

sql/3_triggers.sql

@@ -0,0 +1,96 @@
+-- Триггеры для базы данных интернет-магазина
+-- PostgreSQL
+-- 
+-- ВАЖНО: Этот файл должен выполняться ПОСЛЕ schema.sql
+-- Сначала создайте структуру базы данных (schema.sql), затем создайте триггеры (triggers.sql)
+-- Функции должны быть созданы в schema.sql перед выполнением этого файла
+
+-- Триггеры для автоматического обновления updated_at
+DROP TRIGGER IF EXISTS update_resources_updated_at ON resources;
+CREATE TRIGGER update_resources_updated_at BEFORE UPDATE ON resources
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_actions_updated_at ON actions;
+CREATE TRIGGER update_actions_updated_at BEFORE UPDATE ON actions
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_permissions_updated_at ON permissions;
+CREATE TRIGGER update_permissions_updated_at BEFORE UPDATE ON permissions
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_roles_updated_at ON roles;
+CREATE TRIGGER update_roles_updated_at BEFORE UPDATE ON roles
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_users_updated_at ON users;
+CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_categories_updated_at ON categories;
+CREATE TRIGGER update_categories_updated_at BEFORE UPDATE ON categories
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_order_statuses_updated_at ON order_statuses;
+CREATE TRIGGER update_order_statuses_updated_at BEFORE UPDATE ON order_statuses
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_payment_methods_updated_at ON payment_methods;
+CREATE TRIGGER update_payment_methods_updated_at BEFORE UPDATE ON payment_methods
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_payment_statuses_updated_at ON payment_statuses;
+CREATE TRIGGER update_payment_statuses_updated_at BEFORE UPDATE ON payment_statuses
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_products_updated_at ON products;
+CREATE TRIGGER update_products_updated_at BEFORE UPDATE ON products
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_addresses_updated_at ON addresses;
+CREATE TRIGGER update_addresses_updated_at BEFORE UPDATE ON addresses
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_orders_updated_at ON orders;
+CREATE TRIGGER update_orders_updated_at BEFORE UPDATE ON orders
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_cart_items_updated_at ON cart_items;
+CREATE TRIGGER update_cart_items_updated_at BEFORE UPDATE ON cart_items
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_reviews_updated_at ON reviews;
+CREATE TRIGGER update_reviews_updated_at BEFORE UPDATE ON reviews
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_payments_updated_at ON payments;
+CREATE TRIGGER update_payments_updated_at BEFORE UPDATE ON payments
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+-- Триггеры для обновления рейтинга товара
+DROP TRIGGER IF EXISTS update_product_rating_on_review_insert ON reviews;
+CREATE TRIGGER update_product_rating_on_review_insert
+    AFTER INSERT ON reviews
+    FOR EACH ROW
+    WHEN (NEW.is_approved = TRUE)
+    EXECUTE FUNCTION update_product_rating();
+
+DROP TRIGGER IF EXISTS update_product_rating_on_review_update ON reviews;
+CREATE TRIGGER update_product_rating_on_review_update
+    AFTER UPDATE ON reviews
+    FOR EACH ROW
+    WHEN (NEW.is_approved != OLD.is_approved OR NEW.rating != OLD.rating)
+    EXECUTE FUNCTION update_product_rating();
+
+DROP TRIGGER IF EXISTS update_product_rating_on_review_delete ON reviews;
+CREATE TRIGGER update_product_rating_on_review_delete
+    AFTER DELETE ON reviews
+    FOR EACH ROW
+    EXECUTE FUNCTION update_product_rating();
+
+-- Триггер для автоматической генерации номера заказа
+DROP TRIGGER IF EXISTS generate_order_number_trigger ON orders;
+CREATE TRIGGER generate_order_number_trigger
+    BEFORE INSERT ON orders
+    FOR EACH ROW
+    EXECUTE FUNCTION generate_order_number();
+