views package, add, update in userStore, user model rules, add todo.md

data/psql.go

@@ -34,6 +34,7 @@ func UsePSQL() {
 	u1 := model.NewUser(3, 19, "paul", "newman", "PdsN@FDKML.COM")
 	store.Update(16, u1)
 	log.Print(store.Get(1))
+	store.Delete(8)
 }
 
 func sqlExec(db *sql.DB, s string) {
@@ -51,10 +52,11 @@ func createUserTable(db *sql.DB) {
 
 // Store interface defines the methods any store must satisfy
 type Store interface {
-	CreateTable()
+	// CreateTable()
 	Add(i interface{})
-	Get(id int) model.User
+	Get(id int) (model.User, error)
-	Find(id int)
+	GetAll(id int) ([]model.User, error)
-	Update(id int, i interface{})
 	Delete(id int)
+	// Find(id int)
+	Update(id int, i interface{})
 }

data/userQueries.go

@@ -14,7 +14,12 @@ const (
 
 	// QueryGet is the SQL command used to retrieve a user from the table
 	QueryGet = `
-	SELECT * id FROM users WHERE id=$1;
+	SELECT * FROM users WHERE id=$1;
+	`
+
+	// QueryGetAll is the SQL command used to retrieve all users from the database.
+	QueryGetAll = `
+	SELECT * FROM users;
 	`
 
 	// QueryInsert is the SQL command used to insert a user in the table.

data/userStore.go

@@ -17,18 +17,24 @@ func NewUserStore(db *sql.DB) UserStore {
 	return UserStore{db: db}
 }
 
+// GetAll retrieves all the users from the database.
+func (us UserStore) GetAll() ([]model.User, error) {}
+
 // Get retrieves the user identified by 'id' from database
-func (us UserStore) Get(uid int) model.User {
+func (us UserStore) Get(uid int) (model.User, error) {
 	var id, age int
-	var firstName,lastName,email string
+	var firstName, lastName, email string
+
 	row := us.db.QueryRow(QueryGet, uid)
-	switch err:=row.Scan(&id,&age,&firstName,&lastName,&email); err {
+	switch err := row.Scan(&id, &age, &firstName, &lastName, &email); err {
 	case sql.ErrNoRows:
 		log.Println("No entry returned")
+		return model.User{}, err
 	case nil:
-		return model.NewUser(id, age,firstName,lastName,email)
+		return model.NewUser(id, age, firstName, lastName, email), nil
 	default:
 		log.Fatal(err)
+		return model.User{}, err
 	}
 }
 
@@ -57,7 +63,6 @@ func (us UserStore) Update(id int, u model.User) {
 	}
 }
 
-
 // Delete removes user identified by 'id' from the database
 func (us UserStore) Delete(id int) {
 	res, err := us.db.Exec(QueryDelete, id)
@@ -71,3 +76,4 @@ func (us UserStore) Delete(id int) {
 	if count == 0 {
 		log.Fatal("Update failed") // too severe
 	}
+}