我正在关注youtube上的有关烧瓶管理工作的教程。现在，我只是想让它在route.py中工作，以查看它是否工作（我也尝试过模型，每次都会失败）。
这是我的代码
from flask_login import UserMixin
from flask_admin import Admin
from flask_admin.contrib.sqla import ModelView
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(20))
admin = Admin(app)
admin.add_view(ModelView(User, db.session))
在浏览器中执行http://127.0.0.1:5000/admin/时出现错误
builtins.TypeError
TypeError: Can't compile non template nodes
我花了最后3个小时来弄清楚发生了什么，但这没有任何意义，我在任何地方都找不到任何类似的问题。
追踪
Traceback (most recent call last):
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1997, in __call__
return self.wsgi_app(environ, start_response)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1985, in wsgi_app
response = self.handle_exception(e)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1540, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask_admin/base.py", line 69, in inner
return self._run_view(f, *args, **kwargs)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask_admin/base.py", line 368, in _run_view
return fn(self, *args, **kwargs)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask_admin/base.py", line 452, in index
return self.render(self._template)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask_admin/base.py", line 308, in render
return render_template(template, **kwargs)
File "/Users/me/anaconda/lib/python3.6/site-packages/flask/templating.py", line 133, in render_template
return _render(ctx.app.jinja_env.get_or_select_template(template_name_or_list),
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/environment.py", line 869, in get_or_select_template
return self.get_template(template_name_or_list, parent, globals)
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/environment.py", line 830, in get_template
return self._load_template(name, self.make_globals(globals))
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/environment.py", line 804, in _load_template
template = self.loader.load(self, name, globals)
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/loaders.py", line 125, in load
code = environment.compile(source, name, filename)
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/environment.py", line 581, in compile
defer_init=defer_init)
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/environment.py", line 543, in _generate
optimized=self.optimized)
File "/Users/me/anaconda/lib/python3.6/site-packages/jinja2/compiler.py", line 78, in generate
raise TypeError('Can\'t compile non template nodes')
TypeError: Can't compile non template nodes