我试图在django中练习ajax，但我得到了这个错误'QuerySet'对象没有属性'META'。但由于错误，它在回溯中显示数据，而不在模板中显示。如何解决这个问题?
models.py
from django.db import models
# Create your models here.
class Profile(models.Model):
name = models.CharField(max_length=100)
email = models.CharField(max_length=100)
bio = models.CharField(max_length=100)
def __str__(self):
return self.name
我认为这与视图有关，但我不明白。views.py
from django.shortcuts import render
from .models import Profile
from django.http import JsonResponse
# Create your views here.
def list(request):
return render(request, 'livedata/list.html')
def getProfiles(request):
profiles = Profile.objects.all()
# print(JsonResponse({"profiles": list(profiles.values())}))
return JsonResponse({"profiles": list(profiles.values())})
urls . py
from django.urls import path
from . import views
urlpatterns = [
path('', views.list, name='list'),
path('getProfiles', views.getProfiles, name='getProfiles')
]
index . html
{% load static %}
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
{% comment %} <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> {% endcomment %}
<script src="https://code.jquery.com/jquery-3.5.1.js" integrity="sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH/C8ycbRAkjPDc=" crossorigin="anonymous"></script>
<script src="{% static 'js/main.js' %}" defer></script>
<title>Hello, world!</title>
</head>
<body>
{% block contents %}{% endblock contents %}
{% block scripts %}{% endblock scripts %}
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
{% comment %} <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> {% endcomment %}
{% comment %} <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script> {% endcomment %}
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</body>
</html>
list.html
{% extends 'livedata/index.html' %}
{% block contents %}
<h1>List of live data</h1>
<ul id="display">
</ul>
{% endblock contents %}
{% block scripts %}
<script>
$(document).ready(function () {
setInterval(function () {
$.ajax({
type: 'GET',
url: "{% url 'getProfiles' %}",
success: function (response) {
// console.log(response);
$("#display").empty();
for (var key in response.profiles) {
var temp = "<li>" + response.profiles[key].name + "</li>";
$("#display").append(temp);
}
},
error: function (response) {
alert("Error occured");
}
});
}, 1000);
});
</script>
{% endblock scripts %}
您不应该将视图命名为list,list是您在其他视图中使用的内置函数。通过定义一个名为list的视图，list(profiles.values())将调用以profile.values()为请求的视图。
将list重命名为view_list，并将url模式更新为直接指向view_list:
defview_list(request):
return render(request, 'livedata/list.html')
def getProfiles(request):
profiles = Profile.objects.all()
# does not refer to the view ↓ but to the list builtin
return JsonResponse({"profiles":list(profiles.values())})因此urls.py看起来像:
from django.urls import path
from . import views
urlpatterns = [
path('', views.view_list, name='list'),
path('getProfiles', views.getProfiles, name='getProfiles')
]