小编use*_*242的帖子

我一直在阅读SQLAlchemy文档,但我不理解它们.错误(UnmappedInstanceError)表示某些内容未映射.什么没有映射？我真的没有得到sqlalchemy,我想回到使用裸体sqlite,但很多人推荐这个,所以我想我应该学习它.这是追溯:

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()

File "C:\Users\Me\repos\mandj\venv\lib\site-packages\flask\app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)

File "C:\Users\Me\repos\mandj2\app\views.py", line 170, in add_manentry
db.session.add(q)

File …

码

var q = JSON.parse('[{"15": {"bUrl": "https://example.com/r2359","name": "Ninpo","url": null,"desc": null,"series": [{"title": "Nana","id": "6308","authors": ["Author1"]}]}}, {"390": {"bUrl": "https://example.com/r2667","name": "Sanpo","url": null,"desc": null,"series": [{"title": "Baba","id": "6498","authors": ["Author2"]}]}}]');

var yy = [];
for (i = 0; i < q.length; i++) {
    yy.push(q[i]);
}
console.log(yy);

我正在尝试访问字符串"15"和"390",但循环遍历它们只是给我每个组的整个对象.我如何只提取数字字符串,以便我可以用它们构建一个数组？