add edit event feature

app.py

@@ -53,16 +53,17 @@ class Event(db.Model):
     def __repr__(self):
         return f'<Event "{self.id}">'
 
+def get_tasks():
+    return Task.query
 class TaskForm(FlaskForm):
     title = StringField('Title', validators=[InputRequired(),
                                              Length(min=5, max=100)])
     description = TextAreaField('Description', validators=[InputRequired(),
                                                            Length(max=200)])
 class EventForm(FlaskForm):
-    eventDate = DateField('Date', validators=[InputRequired()], format='m-%d-%Y')
-    period_num = IntegerField(validators=[InputRequired()])
-    selectedTask = QuerySelectField(label='Task', get_label='title' )
-
+    # eventDate = DateField('Date', validators=[InputRequired()], format='m-%d-%Y')
+    # period_num = IntegerField(validators=[InputRequired()])
+    selectedTask = QuerySelectField(label='New Task', query_factory=get_tasks, get_label='title', allow_blank=True, blank_text='(no task)')
 
 @app.route('/')
 def index():
@@ -71,12 +72,22 @@ def index():
 @app.route('/events')
 def events():
     events = Event.query.all()
-    tasks = Task.query.order_by('title')
     periods = Period.query.all()
 
-    form = EventForm(obj=tasks)
-    return render_template('events.html', events=events, periods=periods, datetime=datetime, date=date, form=form)
+    return render_template('events.html', events=events, periods=periods, datetime=datetime, date=date)
 
+@app.route('/event/edit/<int:event_id>/', methods=('GET', 'POST'))
+def editEvent(event_id):
+    event = Event.query.get_or_404(event_id)
+    form = EventForm(obj=event)
+    if form.validate_on_submit():
+        if hasattr(form.selectedTask.data, 'id'):
+            event.task_id = form.selectedTask.data.id
+        else:
+            event.task_id = None
+        db.session.commit()
+        return redirect('/events')
+    return render_template('editEvent.html', event=event, form=form, datetime=datetime)
 @app.route('/tasks')
 def tasks():
     tasks = Task.query.all()