Revise flashcard and tests

backend/Makefile

@@ -36,7 +36,7 @@ fmt: ## Format code
 test: ## Run tests
 	printf "${GREEN}Run all tests\n\n${WHITE}"; \
 	go clean -testcache; \
- 	${ENV} go test -v ./...; \
+ 	${ENV} go test -race ./...; \
 	printf "${GREEN}Done\n"; \
 
 .PHONY: help

backend/db/migrations/20240704123000_create_users_and_cards_tables.sql

@@ -12,40 +12,21 @@ CREATE TABLE users
 CREATE TABLE cards
 (
     id            SERIAL PRIMARY KEY,
-    front         TEXT      NOT NULL,
-    back          TEXT      NOT NULL,
-    review_date   TIMESTAMP NOT NULL,
-    interval_days INT       NOT NULL DEFAULT 1,
-    created       TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
-    updated       TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
+    front         TEXT         NOT NULL,
+    back          TEXT         NOT NULL,
+    review_date   TIMESTAMP    NOT NULL,
+    interval_days INT          NOT NULL DEFAULT 1,
+    created       TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated       TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    user_id       VARCHAR(255) NOT NULL,
+    CONSTRAINT fk_user
+        FOREIGN KEY (user_id)
+            REFERENCES users (id)
+            ON DELETE CASCADE
 );
 
-CREATE
-OR REPLACE FUNCTION update_updated_at_column()
-RETURNS TRIGGER AS $$
-BEGIN
-    NEW.updated
-= CURRENT_TIMESTAMP;
-RETURN NEW;
-END;
-$$
-LANGUAGE plpgsql;
-
-CREATE TRIGGER update_users_updated_at
-    BEFORE UPDATE
-    ON users
-    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
-
-CREATE TRIGGER update_cards_updated_at
-    BEFORE UPDATE
-    ON cards
-    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
-
 -- +goose Down
 -- SQL section 'Down' is executed when this migration is rolled back.
 
-DROP TRIGGER IF EXISTS update_users_updated_at ON users;
-DROP TRIGGER IF EXISTS update_cards_updated_at ON cards;
-DROP FUNCTION IF EXISTS update_updated_at_column;
 DROP TABLE IF EXISTS cards;
 DROP TABLE IF EXISTS users;