flask-admin 基本示例抛出 builtins.AttributeError 异常

Question

不确定我做错了什么。我正在遵循 flask-admin 的快速入门指南（link) and just tried running the basic example provided under the Initialization section。当我运行该代码并浏览到 localhost:5000/admin/ 时，我收到以下错误

builtins.AttributeError
AttributeError: 'For' 对象没有属性 'test'

如果有帮助，我也可以粘贴详细的异常堆栈。

我怀疑缺少依赖项并尝试重新安装 flask-admin，但没有帮助。这是我的 pip freeze 输出：

$ pip freeze
APScheduler==3.3.1
click==6.7
dominate==2.3.1
Flask==0.12.2
Flask-Admin==1.5.0
Flask-APScheduler==1.7.0
Flask-Bootstrap==3.3.7.1
Flask-SQLAlchemy==2.2
itsdangerous==0.24
Jinja2==2.9.6
MarkupSafe==1.0
python-dateutil==2.6.1
pytz==2017.2
six==1.10.0
SQLAlchemy==1.1.13
SQLAlchemy-Utils==0.32.14
tzlocal==1.4
visitor==0.1.3
Werkzeug==0.12.2
WTForms==2.1

我正在使用 python 3.6.1

我的代码与示例完全一样：

from flask import Flask
from flask.ext.admin import Admin

app = Flask(__name__)

admin = Admin(app)

app.run()

这是异常堆栈：

    Traceback (most recent call last):
      File "c:\project\.venv\lib\site-packages\flask\app.py", line 1982, in wsgi_app
        response = self.full_dispatch_request()
      File "c:\project\.venv\lib\site-packages\flask\app.py", line 1614, in full_dispatch_request
        rv = self.handle_user_exception(e)
      File "c:\project\.venv\lib\site-packages\flask\app.py", line 1517, in handle_user_exception
        reraise(exc_type, exc_value, tb)
      File "c:\project\.venv\lib\site-packages\flask\_compat.py", line 33, in reraise
        raise value
      File "c:\project\.venv\lib\site-packages\flask\app.py", line 1612, in full_dispatch_request
        rv = self.dispatch_request()
      File "c:\project\.venv\lib\site-packages\flask\app.py", line 1598, in dispatch_request
        return self.view_functions[rule.endpoint](**req.view_args)
      File "c:\project\.venv\lib\site-packages\flask_admin\base.py", line 69, in inner
        return self._run_view(f, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\flask_admin\base.py", line 368, in _run_view
        return fn(self, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\flask_admin\base.py", line 452, in index
        return self.render(self._template)
      File "c:\project\.venv\lib\site-packages\flask_admin\base.py", line 308, in render
        return render_template(template, **kwargs)
      File "c:\project\.venv\lib\site-packages\flask\templating.py", line 134, in render_template
        context, ctx.app)
      File "c:\project\.venv\lib\site-packages\flask\templating.py", line 116, in _render
        rv = template.render(context)
      File "c:\project\.venv\lib\site-packages\jinja2\asyncsupport.py", line 76, in render
        return original_render(self, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\jinja2\environment.py", line 1008, in render
        return self.environment.handle_exception(exc_info, True)
      File "c:\project\.venv\lib\site-packages\jinja2\environment.py", line 780, in handle_exception
        reraise(exc_type, exc_value, tb)
      File "c:\project\.venv\lib\site-packages\jinja2\_compat.py", line 37, in reraise
        raise value.with_traceback(tb)
      File "c:\project\.venv\lib\site-packages\flask_admin\templates\bootstrap2\admin\index.html", line 1, in top-level template code
        {% extends 'admin/master.html' %}
      File "c:\project\.venv\lib\site-packages\flask_admin\templates\bootstrap2\admin\master.html", line 1, in top-level template code
        {% extends admin_base_template %}
      File "c:\project\.venv\lib\site-packages\jinja2\environment.py", line 543, in _generate
        optimized=self.optimized)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 82, in generate
        generator.visit(node)
      File "c:\project\.venv\lib\site-packages\jinja2\visitor.py", line 38, in visit
        return f(node, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 772, in visit_Template
        self.blockvisit(block.body, block_frame)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 372, in blockvisit
        self.visit(node, frame)
      File "c:\project\.venv\lib\site-packages\jinja2\visitor.py", line 38, in visit
        return f(node, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 1130, in visit_If
        self.blockvisit(node.body, if_frame)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 372, in blockvisit
        self.visit(node, frame)
      File "c:\project\.venv\lib\site-packages\jinja2\visitor.py", line 38, in visit
        return f(node, *args, **kwargs)
      File "c:\project\.venv\lib\site-packages\jinja2\compiler.py", line 1014, in visit_For
        if node.test:
    AttributeError: 'For' object has no attribute 'test'

将不胜感激任何建议。

Answer 1

我怀疑我搞砸了我的 venv。我再次尝试使用全新的 venv，安装了所有软件包，现在一切正常。希望这对某人有所帮助。

flask-admin 基本示例抛出 builtins.AttributeError 异常

flask-admin basic example throws builtins.AttributeError exception

flask

flask-admin