title: "TypeError: 'bool' object is not callable" in flask
body: <p>I have <code>is_active = db.Column(db.Boolean(), nullable=False)</code> field in user model in my <code>flask app</code> now when am loging in, I get the error <code>TypeError: 'bool' object is not callable</code> </p>
  
  <p>Traceback</p>
  
  <pre><code>.
  .
  .
  File "/home/environments/flask0101/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
  return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/flask/myapp/app/auth/views.py", line 15, in  login
  login_user(user)
  File "/home/environments/flask0101/lib/python2.7/site-packages/flask_login.py", line 675, in login_user
  if not force and not user.is_active():
  TypeError: 'bool' object is not callable
  </code></pre>
  
  <p>What is the issue?</p>