Add update and creat fields in schemas

backend/db/migrations/20240704123000_create_users_and_cards_tables.sql

@@ -0,0 +1,51 @@
+-- +goose Up
+-- SQL in section 'Up' is executed when this migration is applied.
+
+CREATE TABLE users
+(
+    id      VARCHAR(255) PRIMARY KEY,
+    name    VARCHAR(255) NOT NULL,
+    created TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated TIMESTAMP    NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+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
+);
+
+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;

backend/pkg/flashcard/card.go

@@ -0,0 +1,13 @@
+package flashcard
+
+import "time"
+
+type Card struct {
+	ID           uint      `gorm:"primaryKey"`
+	Front        string    `gorm:"not null"`
+	Back         string    `gorm:"not null"`
+	ReviewDate   time.Time `gorm:"not null"`
+	IntervalDays int       `gorm:"not null;default:1"`
+	Created      time.Time `gorm:"autoCreateTime"`
+	Updated      time.Time `gorm:"autoUpdateTime"`
+}

backend/pkg/flashcard/flashcard_system.go

@@ -5,15 +5,6 @@ import (
 	"time"
 )
 
-// Card struct represents a flashcard with necessary fields
-type Card struct {
-	ID           uint      `gorm:"primaryKey"`
-	Front        string    `gorm:"not null"`
-	Back         string    `gorm:"not null"`
-	ReviewDate   time.Time `gorm:"not null"`
-	IntervalDays int       `gorm:"not null;default:1"`
-}
-
 // GetDueCards retrieves flashcards that are due for review
 func GetDueCards(db *gorm.DB) ([]Card, error) {
 	var cards []Card

backend/pkg/flashcard/user.go

@@ -0,0 +1,12 @@
+package flashcard
+
+import (
+	"time"
+)
+
+type User struct {
+	ID      string    `gorm:"primaryKey"`
+	Name    string    `gorm:"not null"`
+	Created time.Time `gorm:"autoCreateTime"`
+	Updated time.Time `gorm:"autoUpdateTime"`
+}