Question

我对Django和python还是很陌生，在我的应用中，我有两个模型，一个是-moz-element()，另一个是MyProfile，用户将拥有个人资料，用户可以创建帖子，它是所有工作，但我想显示用户在其个人资料中创建的帖子。为此，我尝试在通用MyPost内创建一个get_context_data。但这给了我这个错误Detailview。 ahmy是我登录的用户名。

我的模型

Cannot query "ahmy": Must be "MyProfile" instance

我的视图 @method_decorator（需要登录，名称=“ dispatch”）

from django.db import models
from django.contrib.auth.models import User
from django.db.models.deletion import CASCADE
from django.core.validators import MinValueValidator, RegexValidator


# Create your models here.
class MyProfile(models.Model):
    name = models.CharField(max_length = 500)
    user = models.OneToOneField(to=User, on_delete=CASCADE)
    address = models.TextField(null=True, blank=True)
    gender = models.CharField(max_length=20, default="Male", choices=(("Male", 'Male'), ("Female", "Female"), ("LGBTQ", "LGBTQ")))
    phone_no = models.CharField(validators=[RegexValidator("^0?[5-9]{1}\d{9}$")], max_length=15, null=True, blank=True)
    description = models.CharField(max_length = 240, null=True, blank=True)
    pic = models.ImageField(upload_to = "image\\", null=True)

    def __str__(self):
        return "%s" % self.user


class MyPost(models.Model):
    main_pic = models.ImageField(upload_to = "image\\", null=True)
    amount_spend = models.IntegerField(null=True, blank=True)
    total_donars = models.IntegerField(null=True, blank=True)
    title = models.CharField(max_length = 200)
    body = models.TextField(null=False, blank=False)
    cr_date = models.DateTimeField(auto_now_add=True)
    uploaded_by = models.ForeignKey(to=MyProfile, on_delete=CASCADE, null=True, blank=True)
    def __str__(self):
        return "%s" % self.title

我的HTML文件

class MyProfileDetailView(DetailView):
    model = MyProfile
    def get_context_data(self, **kwargs):
        # Call the base implementation first to get a context
        context = super().get_context_data(**kwargs)
        # Add in a QuerySet of all the user posts
        user_posts = MyPost.objects.filter(uploaded_by=self.request.user).order_by('-cr_date')
        context['user_posts'] = user_posts
        context['user'] = self.request.user
        return context

URLS

{% extends 'base.html' %}
{% block content %}
<div class="p-5">
<img src="/media/{{myprofile.pic}}" />
<h1 class="myhead2">{{myprofile.name}}</h1>
<p><strong>Address: {{myprofile.address}}</strong></p>
<p><strong>Phone Number: {{myprofile.phone_no}}</strong></p>
<p><strong>Email: {{myprofile.user.email}}</strong></p>
<p><strong>About:</strong> {{myprofile.purpose}}</p>
<p><strong> Total Donation Recived: {{myprofile.donation_recived}}</strong></p>
<hr>

<table class="table my-3">
    <thead class="thead-dark">
        <tr>
            <th>Title</th>
            <th>Date</th>
            <th>Action</th>
        </tr>
    </thead>
{% for MyPost in user_posts %}
        <tr>
            <td>{{MyPost.title}}</td>
            <td>{{MyPost.cr_date | date:"d/m/y"}}</td>
            <td>
            <a class="btn btn-dark btn-sm" href='/covid/mypost/{{n1.id}}'>Read More</a>
            <a class="btn btn-dark btn-sm" href='/covid/mypost/delete/{{n1.id}}'>Delete</a>
            </td>
        </tr>
{% endfor %}
</table>
</div>
{% endblock %}

Answer 1

uploaded_by字段引用的是MyProfile模型，而不是User模型。您可以将查询更改为：

user_posts = MyPost.objects.filter(
    uploaded_by__user=self.request.user
).order_by('-cr_date')

因此，通过使用双下划线（__），我们可以“遍历”一个关系，因此，我们寻找MyPost是uploaded_by且{ MyProfile对user对象的引用。

如果要在路径中显示request.user，请显示用户的内容：

pk

您可以将其替换为：

path('myprofile/<int:pk>', views.MyProfileDetailView.as_view()),

假设user_posts = MyPost.objects.filter( uploaded_by_id=self.kwargs['pk'] ).order_by('-cr_date')是 profile id；或：

pk

如果user_posts = MyPost.objects.filter( uploaded_by__user_id=self.kwargs['pk'] ).order_by('-cr_date')引用了 user id。

或者您可以使用pk：

self.object

无法查询“”：必须是“”实例

1 个答案: