Add ability to connect to hear rate sensor and post data back to server on workout complete, currently not rendering graphing data

app.py

@@ -68,6 +68,15 @@ class CadenceReading(db.Model):
     power = db.Column(db.Integer, nullable=False)
 
 
+class HeartRateReading(db.Model):
+    __tablename__ = 'heartrate_readings'
+    id = db.Column(db.Integer, primary_key=True)
+    workout_id = db.Column(db.Integer, db.ForeignKey(
+        'workouts.id', ondelete='CASCADE'), nullable=False)
+    created_at = db.Column(db.DateTime, nullable=False)
+    bpm = db.Column(db.Integer, nullable=False)
+
+
 @app.route('/', methods=['GET'])
 def get_workouts():
     return render_users_and_workouts()
@@ -113,21 +122,31 @@ def workouts(user_id):
 
     elif request.method == 'POST':
         user = User.query.get(user_id)
+        app.logger.info(f'Creating workout for user {user.name} ({user.id})')
 
         data = request.json
-        data = data['workout']
+        workout = data['workout'] or []
+        heart_rate = data['heart_rate'] or []
 
         # create a new workout
         workout = Workout(user_id=user_id, bike_id=user.bike_id)
         db.session.add(workout)
         db.session.commit()
 
+        app.logger.info(
+            f'Workout({workout.id}) created for user {user.name} ({user.id}) with {len(workout)} cadence readings and {len(heart_rate)} heart rate readings')
+
         # add cadence readings to the workout
-        for d in data:
+        for w in workout:
             cadence_reading = CadenceReading(
-                workout_id=workout.id, created_at=d['timestamp'], rpm=d['rpm'], distance=d['distance'], speed=d['speed'], calories=d['calories'], power=d['power'])
+                workout_id=workout.id, created_at=w['timestamp'], rpm=w['rpm'], distance=w['distance'], speed=w['speed'], calories=w['calories'], power=w['power'])
             db.session.add(cadence_reading)
 
+        for h in heart_rate:
+            heart_rate_reading = HeartRateReading(
+                workout_id=workout.id, created_at=h['timestamp'], bpm=h['bpm'])
+            db.session.add(heart_rate_reading)
+
         db.session.commit()
 
         return jsonify({'message': 'Workout created successfully.'}), 201