从Flask中的html表单获取请求的复杂路由 [英] Complex routing for get request from html form in flask

问题描述

我正在尝试为如下所示的get请求创建复杂的路由:

I'm trying to create complex routing for a get request that looks like this:

@app.route('/get-details?id=<int:id>&code=<int:code>', methods=['GET'])
@login_required
def get_details(id, code):
    # Do something with code and id ....

在我的模板中，我有一个看起来像这样的表单:

And in my template I have a form that looks like this:

<form action="{{url_for('get_details')}}" method="get">
    {{ form.hidden_tag() }}
    {{ form.id() }}
    {{ form.code() }}
    <input type="submit">

</form>

但是当我尝试渲染我的页面时，出现了这个异常:

But when I try to render my page I get this exception:

  File "/home/sharon/dev/wiseart/credixdealer/app/templates/dashboard/form-device.html", line 113, in block "content"
    <form action="{{url_for('get_details')}}" method="get">
  File "/usr/local/lib/python2.7/dist-packages/flask/helpers.py", line 332, in url_for
    return appctx.app.handle_url_build_error(error, endpoint, values)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1811, in handle_url_build_error
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/dist-packages/flask/helpers.py", line 322, in url_for
    force_external=external)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/routing.py", line 1758, in build
    raise BuildError(endpoint, values, method, self)
BuildError: Could not build url for endpoint 'get_details'. Did you forget to specify values ['business_id', 'id']?

如何在url_for中指定应从表单本身中检索参数?

How can I specify in url_for that the parameters should be retrieved from the form itself?

推荐答案

不要在路由定义中添加查询参数.而是从request.args获取它们. args.get带有可选的type参数，因此您仍然可以验证值的类型.

Don't put query args in the route definition. Instead, get them from request.args. args.get takes an optional type argument, so you can still validate the type of the value.

@app.route('/get_details')
def get_details():
    id = request.args.get('id', type=int)
    code = request.args.get('code', type=int)
    ...

---

有关特定错误的解决方案，请阅读错误消息.您有一个带有两个URL组的路由，但是没有为它们提供值到url_for.由于您仅在客户端上填写表单后才知道args，因此这成为为什么不将查询args放在路由中的一个很好的论据.

---

For the solution to your specific error, read the error message. You have a route with two url groups, but you don't supply values for them to url_for. Since you only know the args after the form is filled out on the client, this becomes a good argument for why you don't put query args in the route.

url_for('get_details', id=2, code=108)

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