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Михаил moonz's questions

Martin Hope
Михаил moonz
Asked: 2022-04-04 21:00:42 +0000 UTC
  • 0

大家好，情况如下。有一个基本模板，其中定义了一个标头，在此标头中有一个 *notifications 栏通知字段。我的任务的本质是基础模板不是通过继承它的模板，而是直接从数据库接收数据，也就是预渲染的特性。我熟悉 {{ super }} 的工作原理，但在这种情况下，每次渲染扩展基本模板的任何页面时，我都需要传递状态，我认为这违反了概念

不要重复自己

对此，我有一个问题：如何为基本模板声明一次数据，并在从另一个模板渲染时调用它们？例如，我看到了这样一个实现。创建一个从数据库获取新数据并将其绑定到基本模板的函数。每当呈现可扩展模板时，此函数都会更新基本模板的状态，这也是我需要该页面的原因。如果我误解了什么，或者做了什么，那么请告诉我，我很乐意使用你的版本。我只是不明白如何以正确的方式实现它！谢谢你。

flask
Martin Hope
Михаил moonz
Asked: 2020-03-13 02:26:13 +0000 UTC
  • 0

情况如下。上有一个博客项目flask，我按照自己的方式连接了管理面板flask-admin。app.py通过添加配置：

admin.add_view(ModelView(Post, db.session))
admin.add_view(ModelView(Tag, db.session))

在第一种情况下，使用帖子没有任何抱怨（创建帖子、编辑、删除）。一切都很顺利。

但就目前Tag而言，这就是问题出现的地方。编辑已经创建（手动）的标签很好，但是当您创建标签时，填写字段后，会弹出以下消息：

builtins.TypeError
TypeError: expected string or bytes-like object
    Traceback (most recent call last):
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1997, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1985, in wsgi_app
    response = self.handle_exception(e)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1540, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
    raise value
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/base.py", line 69, in inner
    return self._run_view(f, *args, **kwargs)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/base.py", line 368, in _run_view
    return fn(self, *args, **kwargs)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/model/base.py", line 1997, in create_view
    model = self.create_model(form)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/contrib/sqla/view.py", line 1079, in create_model
    if not self.handle_view_exception(ex):
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/contrib/sqla/view.py", line 1062, in handle_view_exception
    return super(ModelView, self).handle_view_exception(exc)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/flask_admin/contrib/sqla/view.py", line 1073, in create_model
    model = self.model()
  File "<string>", line 4, in __init__

  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/sqlalchemy/orm/state.py", line 417, in _initialize_instance
    manager.dispatch.init_failure(self, args, kwargs)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/sqlalchemy/util/compat.py", line 187, in reraise
    raise value
  File "/home/moonz/Рабочий стол/Flask/venv/lib/python3.6/site-packages/sqlalchemy/orm/state.py", line 414, in _initialize_instance
    return manager.original_init(*mixed[1:], **kwargs)
  File "/home/moonz/Рабочий стол/Flask/models.py", line 50, in __init__
    self.slug = slugify(self.name)
  File "/home/moonz/Рабочий стол/Flask/models.py", line 8, in slugify
    return re.sub(pattern, '-', s)  # Заменяет их на дефис
  File "/usr/lib/python3.6/re.py", line 191, in sub
    return _compile(pattern, flags).sub(repl, string, count)
TypeError: expected string or bytes-like object

据我了解，输入了错误的数据类型，但我无法准确理解问题出在哪里（或者更确切地说，在什么问题上）。
我将不胜感激任何提示。

python-3.x