Javascript 如何在ajax调用中使用flaskurl_？

我有这条路线：

@my_app.route('/get_data'/<ticket_number>)
def get_data(ticket_number):
    response = process_data(ticket_number)
    return response

我的问题是用票证号码构建url

据我所知，这就是罪魁祸首：

var jqxhr = $.ajax(eventDataBaseUrl + "/" + String(ticket.innerHTML) )

我有另一个路由，它也做类似的事情，但不传递url参数，如下所示，并且工作正常：

var jqxhr = $.ajax("{{ url_for('get_json_data') }}")

以下是完整的回溯：

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 2000, in __call__
    return self.wsgi_app(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1991, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1567, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1988, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1641, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1544, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1639, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/vagrant/chg_app/chg_app.py", line 92, in eng_demo
    return render_template('eng_demo.html', result=result)
  File "/usr/local/lib/python2.7/dist-packages/flask/templating.py", line 134, in render_template
    context, ctx.app)
  File "/usr/local/lib/python2.7/dist-packages/flask/templating.py", line 116, in _render
    rv = template.render(context)
  File "/usr/local/lib/python2.7/dist-packages/jinja2/environment.py", line 989, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/local/lib/python2.7/dist-packages/jinja2/environment.py", line 754, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/vagrant/chg_app/templates/eng_demo.html", line 1, in top-level template code
    {% extends "base.html" %}
  File "/vagrant/chg_app/templates/base.html", line 73, in top-level template code
    {% block header %}{% endblock %}
  File "/vagrant/chg_app/templates/eng_demo.html", line 258, in block "header"
    var eventDataBaseUrl = "{{ url_for('get_data') }}"
  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_data'. Did you forget to specify values ['ticket_number']?

有人知道使用票证号码参数从javascript调用该路由的正确方法吗？

与其使用url\u获取“eventDataBaseUrl”，而不使用参数，然后连接ID，您必须传递一个伪参数，然后用实际ID替换它。类似于：

var eventDataBaseUrl = "{{ url_for('get_data', 'DUMMY_VALUE') }}"
var actualDataUrl = eventDataBaseUrl.replace(/DUMMY_VALUE/, ticket_id)

---

还要注意，您不应该在那里使用

innerHTML

；假设

ticket\u num

引用了一个输入，您应该使用

.value

您也可以通过GET传递票号，因为

url\u for（）

调用如果没有

票号

将无法工作。

'DUMMY\u VALUE'

方法是一个很好的解决方案。感谢“Daniel Roseman”为我提供了解决方案。这就是工作原理：

code

var eventDataBaseUrl=“{{url\u for（'get\u event\u data'，ticket\u number='DUMMY\u VALUE'）}”；var actualDataUrl=eventDataBaseUrl.replace（/DUMMY_VALUE/，String（ticket.innerHTML））；

var eventDataBaseUrl = "{{ url_for('get_data', 'DUMMY_VALUE') }}"
var actualDataUrl = eventDataBaseUrl.replace(/DUMMY_VALUE/, ticket_id)