Chapter 6

app/models.py

@@ -1,4 +1,5 @@
 from datetime import datetime
+from hashlib import md5
 from werkzeug.security import generate_password_hash, check_password_hash
 from flask_login import UserMixin
 from app import db, login
@@ -15,6 +16,8 @@ class User(UserMixin, db.Model):
     email = db.Column(db.String(120), index=True, unique=True)
     password_hash = db.Column(db.String(128))
     posts = db.relationship("Post", backref="author", lazy="dynamic")
+    about_me = db.Column(db.String(140))
+    last_seen = db.Column(db.DateTime, default=datetime.utcnow)
 
     def __repr__(self):
         return "<User {}>".format(self.username)
@@ -25,6 +28,12 @@ class User(UserMixin, db.Model):
     def check_password(self, password):
         return check_password_hash(self.password_hash, password)
 
+    def avatar(self, size):
+        digest = md5(self.email.lower().encode("utf-8")).hexdigest()
+        return "https://www.gravatar.com/avatar/{}?d=identicon&s={}".format(
+            digest, size
+        )
+
 
 class Post(db.Model):
     id = db.Column(db.Integer, primary_key=True)