controllers/users.go

@@ -50,7 +50,7 @@ func (u Users) PostSignup(w http.ResponseWriter, r *http.Request) {
 	}
 	http.SetCookie(w, &cookie)
 
-	http.Redirect(w, r, "/user", http.StatusFound)
+	http.Redirect(w, r, "/users/me", http.StatusFound)
 }
 
 func (u Users) GetSignin(w http.ResponseWriter, r *http.Request) {
@@ -89,7 +89,7 @@ func (u Users) PostSignin(w http.ResponseWriter, r *http.Request) {
 	}
 	http.SetCookie(w, &cookie)
 
-	http.Redirect(w, r, "/user", http.StatusFound)
+	fmt.Fprintf(w, "User authenticated: %+v", user)
 }
 
 func (u Users) GetSignout(w http.ResponseWriter, r *http.Request) {

models/sessions.go

@@ -61,17 +61,27 @@ func (ss *SessionService) Create(userID int) (*Session, error) {
 		Token:     token,
 		TokenHash: hash(token),
 	}
+
 	row := ss.DB.QueryRow(`
-    INSERT INTO sessions (user_id, token_hash)
+    UPDATE sessions
-		VALUES ($1, $2) ON CONFLICT (user_id) DO
+    SET token_hash = $2
-		UPDATE
+    WHERE user_id = $1
-		SET token_hash = $2
+    RETURNING id;
-		RETURNING id;
   `, session.UserID, session.TokenHash)
 	err = row.Scan(&session.ID)
+	if err == sql.ErrNoRows {
+		row = ss.DB.QueryRow(`
+      INSERT INTO sessions (user_id, token_hash)
+      VALUES ($1, $2)
+      RETURNING id;
+    `, session.UserID, session.TokenHash)
+		err = row.Scan(&session.ID)
+	}
+
 	if err != nil {
 		return nil, fmt.Errorf("create: %w", err)
 	}
+
 	return &session, nil
 }
 
@@ -87,19 +97,20 @@ func (ss *SessionService) Delete(token string) error {
 func (ss *SessionService) User(token string) (*User, error) {
 	token_hash := hash(token)
 	var user User
-
 	row := ss.DB.QueryRow(`
-    SELECT users.id,
+    SELECT (user_id) FROM sessions WHERE token_hash = $1;
-      users.email,
-      users.password_hash
-    FROM sessions
-      JOIN users ON users.id = sessions.user_id
-    WHERE sessions.token_hash = $1;
   `, token_hash)
-	err := row.Scan(&user.ID, &user.Email, &user.PasswordHash)
+	err := row.Scan(&user.ID)
+	if err != nil {
+		return nil, fmt.Errorf("user: %w", err)
+	}
+	row = ss.DB.QueryRow(`
+    SELECT email, password_hash
+    FROM users WHERE id = $1;
+  `, user.ID)
+	err = row.Scan(&user.Email, &user.PasswordHash)
 	if err != nil {
 		return nil, fmt.Errorf("user: %w", err)
 	}
-
 	return &user, err
 }

models/sql/sessions.sql

@@ -1,5 +1,5 @@
 CREATE TABLE sessions (
   id SERIAL PRIMARY KEY,
-  user_id INT UNIQUE REFERENCES users (id) ON DELETE CASCADE,
+  user_id INT UNIQUE, 
   token_hash TEXT UNIQUE NOT NULL
 );