Make User.profile a single object instead of a list

Because it’s a one-to-one relationship anyway, what’s the use of lists here?

calsocial/__init__.py

@@ -256,12 +256,10 @@ class CalendarSocialApp(Flask):
 
         from .models import Profile, User
 
-        try:
-            profile = Profile.query.join(User).filter(User.username == username.lower()).one()
-        except NoResultFound:
+        profile = current_user.profile
+
+        if profile is None:
             abort(404)
-        except MultipleResultsFound:
-            abort(500)
 
         return render_template('profile-details.html', profile=profile)
 

calsocial/models.py

@@ -167,7 +167,7 @@ class Profile(db.Model):  # pylint: disable=too-few-public-methods
     #: The ID of the local user this profile belongs to
     user_id = db.Column(db.Integer(), db.ForeignKey('users.id'), nullable=True, unique=True)
 
-    user = db.relationship(User, backref=db.backref('profile', lazy='dynamic'))
+    user = db.relationship(User, backref=db.backref('profile', uselist=False))
 
     #: The username this profile belongs to.  If ``None``, `user_id` must be set
     username = db.Column(db.String(length=50), nullable=True)