Django自动补全功能触发404错误的排查与解决请求

Let's walk through the issues causing your 404 error and fix them one by one:

1. URL Routing Mismatch (Primary Cause of 404) #

Your script is requesting /api/get_teacher/, but your URL pattern might be duplicated or misconfigured. Here's how to fix it:

If your app's URLs are included under an /api/ prefix in the project's urls.py: #

Project urls.py:

from django.conf.urls import include, url

urlpatterns = [
    # Maps all /api/ requests to your app's URLs
    url(r'^api/', include('your_app_name.urls')),
]

App urls.py:
Remove the /api/ prefix from the pattern and add a $ to ensure exact matching:

urlpatterns = [
    url(r'^get_teacher/$', views.get_teacher, name='get_teacher'),
]

If you're not using a prefix: #

Project urls.py:

urlpatterns = [
    url(r'^api/get_teacher/$', views.get_teacher, name='get_teacher'),
]

2. Template and Form Field Mismatch #

Your template uses {{TeacherForm.asesores}}, but your form defines a field named teacher. This means the input's ID is id_asesores, but your script targets #id_teacher. Fix the template:

<table>
  <td class="input-group mb-3">
    <label for="{{ TeacherForm.teacher.id_for_label }}"> Teacher(es): </label>
    <div class="ui-widget"> {{ TeacherForm.teacher }} </div>
  </td>
</table>

3. View Code Fixes #

Your view has typos and deprecated code that would break functionality even after fixing the 404:

from django.http import HttpResponse
import json
from .models import Teacher  # Make sure to import your model

def get_teacher(request):
    # Replace deprecated is_ajax() with header check
    if request.headers.get('X-Requested-With') == 'XMLHttpRequest':
        q = request.GET.get('term', '')
        # Fix model name and use partial match (icontains) for autocomplete
        teachers = Teacher.objects.filter(lastaname__icontains=q)
        results = []
        for professor in teachers:
            # Use the correct model field name (lastaname)
            full_name = f"{professor.lastaname} {professor.firstname} {professor.middlename}"
            results.append(full_name)
        data = json.dumps(results)
    else:
        data = json.dumps('fail')  # Ensure we return valid JSON even on failure
    return HttpResponse(data, content_type='application/json')

4. Optional (But Recommended): Fix Model Typo #

Your model has lastaname which is likely a typo for lastname. If you fix this:

1. Update the model:

   class Teacher(models.Model):
       firstname = models.CharField(max_length=50)
       middlename = models.CharField(max_length=30)
       lastname = models.CharField(max_length=30)  # Fixed typo
   

2. Run migrations:

   python manage.py makemigrations
   python manage.py migrate
   

3. Update the view to use lastname__icontains=q instead of lastaname.

5. Test the URL Directly #

To confirm the 404 is fixed, visit http://localhost:8000/api/get_teacher/?term=Guerrer in your browser. You should see a JSON array of matching teacher names instead of a 404 page.

内容的提问来源于stack exchange，提问作者AshMGM