NoReverseMatch:找不到带参数'(''，)‘’的'RPA_tool‘的反向。已尝试1个模式：['admin_tool/RPA_tool/(?P<Policy_Number>[^/]+)/$']

Question

我正在尝试在我的Django应用程序中创建一个动态URL，以从搜索页重定向到RPA_Tool/

当我试图加载搜索页面时，我收到了错误的反转消息，'RPA_tool‘带有参数'(''，)’not found‘。已尝试1个模式：['admin_tool/RPA_tool/(?P^/+)/$']

我试着把它换成使用datadisplay.Policy_ID，并且成功地重定向到了Policy_ID。但是，当我把超链接改成datadisplay.Policy_Number时，我收到了这个错误。

下面是HTML：

  <input type="text" id="myInput" onkeyup="searchTable()" placeholder="Search for Policy..">
  <table class = "table">

      <tr class="header">
        <th>Policy ID</th>
        <th>Policy Numbers</th>
      </tr>
    

    <tbody id="myTable">
    {% for datadisplay in Policies %}
    <tr>
        <td>{{datadisplay.Policy_ID}}</td>
        <td>{{datadisplay.Policy_Number}}</td>
        <td> <a class="btn btn-sm btn-info" href="{% url 'RPA_tool' datadisplay.Policy_Number %}"> Update </a> </td>
    </tr>
    {% endfor %}
  </tbody>
</table>

Views.py：

def searchPolicies(request):
    Policies = getPolicyNumbers()
    myfilter = PoliciesFilter()
    context = {'myfilter': myfilter}
    return render(request, 'admin_tool/search.html', {'Policies':Policies, 'myfilter': myfilter})

def RPA_tool(request): 
    if request.method == 'POST':
        form = RPA_tool_form(request.POST)
        if form.is_valid():
            policyNumber = form.cleaned_data.get('Policy_Number')
            messages.success(request, f'{policyNumber} Saved')
            editRPADetails(form)
            return redirect('/admin_tool/')
    else:

        form = RPA_tool_form(initial={'Policy_Number':'Test'})
    return render(request, 'admin_tool/RPA_tool.html', {'form':form})

urls.py：

from django.urls import path
from . import views
# from users import views as user_views


urlpatterns = [
    # path('admin/', admin.site.urls),
    path('', views.home, name='UW-home'),
    path('admin_tool/', views.admin_tool, name ='admin_tool'),
    path('RPA_tool/<str:Policy_Number>/', views.RPA_tool, name ='RPA_tool'),
    path('about/', views.about, name='Admin_Tool about'),
    path('search/', views.searchPolicies, name='searchPolicies')
]

Answer 1

当您的数据库中字段Policy_Number为空的模型中的字段'Policy_Number‘为空时，就会发生这种情况。您可以在django admin中查看它