Django - NoReverseMatch at /.. Reverse for ... 带参数（“”，52）答案

【问题标题】：Django - NoReverseMatch at /.... Reverse for ... with arguments ("",52)Django - NoReverseMatch at /.. Reverse for ... 带参数（“”，52）
【发布时间】：2020-07-03 04:27:31
【问题描述】：

查看了很多类似的 NoReverseMatch 错误，但无法解决我的问题。这是在 Django 中。

我不断得到： /equipment32 处的 NoReverseMatch 未找到带有参数 '('', 32)' 的“设备”的反向操作。尝试了 1 种模式：['equipment(?P[0-9]+)$']

这是回溯：

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\Albert\Desktop\HARVARD CS50\tracker_django\tracker\views.py", line 128, in equipment
    return render(request, "jobs/equipment.html", context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\shortcuts.py", line 19, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\backends\django.py", line 61, in render
    return self.template.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 171, in render
    return self._render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 936, in render
    bit = node.render_annotated(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 903, in render_annotated
    return self.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\loader_tags.py", line 150, in render
    return compiled_parent._render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 163, in _render
    return self.nodelist.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 936, in render
    bit = node.render_annotated(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 903, in render_annotated
    return self.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\loader_tags.py", line 62, in render
    result = block.nodelist.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 936, in render
    bit = node.render_annotated(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\base.py", line 903, in render_annotated
    return self.render(context)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\template\defaulttags.py", line 443, in render
    url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\urls\base.py", line 87, in reverse
    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
  File "C:\ProgramData\Miniconda3\lib\site-packages\django\urls\resolvers.py", line 677, in _reverse_with_prefix
    raise NoReverseMatch(msg)

这是生成链接的模板 job.html：

 <table style="width: 900px">
        <caption style="font-size: 25px">Equipment in Scope</caption>
        <a href="#equipment_form" style="font-size: 20px">Add Equipment</a>
        <tr>
          <th>Site ID</th>
          <th>Equipment Type</th>
          <th>Manufacturer</th>
          <th>Model</th>
          <th>Test Sheet</th>

        </tr>
        {% for equipment in equipments %}

              <tr>

                  {% csrf_token %}
                  <td><a href="{% url 'equipment' equipment.id %}">{{equipment.site_id}}</a></td>
                  <td>{{equipment.template.classification}}</td>
                  <td>{{equipment.manufacturer}}</td>
                  <td>{{equipment.model}}</td>
                  <td><a href="www.drive.google.com">Test Sheet</td>
              </tr>

        {% empty %}
              <li>No Equipment</li>
        {% endfor %}
</table> <br>

这似乎可以很好地加载并为每个设备对象创建链接。这是我的 urls.py：

from django.urls import path
from . import views, constructors
from .models import Job, FSR, Template, Equipment, TestEquipment


urlpatterns = [
     path("equipment<int:equipment_id>", views.equipment, name="equipment"),
]

这个网址应该链接到views.equipment；在这里：

from django.contrib.auth import authenticate, login, logout
from django.contrib.auth.forms import UserCreationForm
from django.shortcuts import render, redirect
from django.http import HttpResponse, Http404, HttpResponseRedirect
from django.urls import reverse

from .models import Job, FSR, Template, Equipment, TestEquipment

def equipment(request, equipment_id):
    if not request.user.is_authenticated:
        return render(request, "jobs/login.html", {"message": None})
    try:
        equipment=Equipment.objects.get(pk=equipment_id)
    except Equipment.DoesNotExist:
        raise Http404("Equipment does not exist.")
    context = {
        "equipment": equipment,
        "templates": Template.objects.all(),
        "test_equipments": equipment.template.recommended_test_equipment.all(),
    }
    if request.user.is_authenticated:
        return render(request, "jobs/equipment.html", context)

这应该会生成我的实际设备.html：

{% extends "jobs/base.html"%}

{% block title %}
  {{equipment.site_id}}
{% endblock %}

{% block body %}
      <h1 style = "text-align: center">{{equipment.site_id}} ({{equipment.template.classification}})</h1>

      <style>table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
}</style>
      <table style="width:900px">
        <caption style="font-size: 25px">Equipment Properties</caption>
        <tr>
          <td>Equipment Type</td>
          <td><b>{{equipment.template.classification}}</b></td>
        </tr>
        <tr>
          <td>Job Site ID or Name</td>
          <td><b>{{equipment.site_id}}</b></td>
        </tr>
        <tr>
          <td>Manufacturer</td>
          <td><b>{{equipment.manufacturer}}</b></td>
        </tr>
        <tr>
          <td>Model</td>
          <td><b>{{equipment.model}}</b></td>
        </tr>
        <tr>
          <td>Link to Manual</td>
          <td><a href="https://www.eaton.com"><b>{{equipment.manual}}</b></a></td>
        </tr>
        <tr>
          <td>Link to Item Folder</td>
          <td><a><b>{{equipment.template.cloud_link}}</b></a></td>
        </tr>
        <tr>
          <td>Equipment Questions</td>
          <td><a><b>{{equipment.template.equipment_questions}}</b></a></td>
        </tr>
        <tr>
          <td>Answers</td>
          <!-- <form action="{% url 'equipment' job.id equipment.id%}" method="post">
          <td><a><b><textarea id="scope" name="scope" rows="4" cols="55" >{{ equipment.equipment_answers }}</textarea><input type="submit" value="Confirm Answers">
          <input type="reset"></b></a></td>
          </form> -->
        </tr>
        <tr>
          <td>Scope for This Equipment</td>
          <td><a><b>{{equipment.scope}}</b></a></td>
        </tr>
        <tr>
          <td>Additional Notes</td>
          <td><a><b>{{equipment.notes}}</b></a></td>
        </tr>
      </table><br>


        <h3>Recommended Test Equpiment</h3>

        <ul>
            {% for test_equipment in test_equipments %}
                <li>

                    {% csrf_token %}
                    {{ test_equipment }}

                </li>
            {% empty %}
                <li>No Equipment</li>
            {% endfor %}
        </ul>



      <button onclick="goBack()">Back to Job Page</button>
      <script>
        function goBack() {
          window.history.back();
        }
      </script>


{% endblock %}

我不明白为什么它似乎要求两个参数设备（“”，35），因为视图函数只接受设备ID。非常感谢任何帮助！

【问题讨论】：

标签： python django django-views django-templates url-routing

【解决方案1】：

在您的模板equipment.html 中，您提供了两个参数，只需删除job.id。虽然有评论但应该是正确的urlpattern

<form action="{% url 'equipment' equipment.id%}" method="post">
          <td><a><b><textarea id="scope" name="scope" rows="4" cols="55" >{{ equipment.equipment_answers }}</textarea><input type="submit" value="Confirm Answers">
          <input type="reset"></b></a></td>
          </form>

【讨论】：

哇！我删除了我之前注释掉的那个表格，它有效。为什么注释掉的 html 会抛出错误。有点烦人，但非常感谢。我正在拔头发
django url resolver 总是处理 url 标签天气它是否评论。谢谢，请点赞。您还可以验证答案。
很高兴知道。谢谢;我投了赞成票，但我没有“15 声望”，所以它没有出现。刚刚在这里开户

【解决方案2】：

我的问题出在 device.html 代码的注释掉部分。我有一个注释掉的部分，其中包括：

 <form action="{% url 'equipment' equipment.id job.id method="post" %}>....

事实证明，django url resolver 总是处理 url 标签，无论是否注释，上面的 html 代码试图发送 url 2 个参数，而我的 url 路径只需要 1 个参数。

【讨论】：