Django 2.1.7 - 从用户（x）检索所有模型字段

Question

你好，这是我在这里的第一篇文章。我是新来python和django我试图更多地了解这两个，所以我和他们一起工作，以获得更多的经验。我试图让所有metros的user(x)可以说1。我希望能有user 1作为id，并得到所有metros与此有关user。楷模from django.db import modelsfrom django.utils import timezonefrom django.contrib.auth.models import User# Create your models here.class Metro(models.Model):class Meta():    verbose_name_plural = "MetroCards"    owner = models.ForeignKey(User, on_delete=models.CASCADE, related_name="Creator")    metro_name = models.CharField( max_length=30)    created = models.DateTimeField(default=timezone.now)    def __str__(self):        return f"{self.metro_name} by: {self.owner}"观看次数from django.shortcuts import render, redirect, Http404from .models import User, Metrofrom django.contrib.auth import login, authenticatefrom django.contrib.auth.forms import UserCreationFormdef user(request, user_id):    try:        user = User.objects.get(pk=user_id)        metro = Metro.owner.get(pk=user_id)    except User.DoesNotExist:        raise Http404("User Does Not Exist")    context = {        "user": user,        "metro": metro    }    return render(request, "metrocard/user.html", context)网址from django.urls import pathfrom . import viewsurlpatterns = [    path('', views.index, name='index'),    path('register/', views.register, name='register'),    path("user/<str:user_id>", views.user, name="userid"),    path('map/', views.map, name='map'),]html<h1>User Id: {{ user.id}} </h1><ul>    <li>Username: {{ user.username }} </li>    <li>Email: {{ user.email }} </li>    {% for met in metro %}        <li>Metro Name: {{ met.metro_name }}</li>    {% endfor %}</ul>我得到的错误是：'ForwardManyToOneDescriptor' object has no attribute 'get'

Answer 1

我认为在你看来你应该改变：

    metro = Metro.owner.get(pk=user_id)

到

    metro = user.metro_set.all()

Answer 2

模型.py

class Product(models.Model): 

    title = models.CharField(max_length=120)

    description = models.TextField(blank=True)

    price = models.TextField()

视图.py

def dynamic_lookup_view(request,my_id):

    object = Product.objects.get(id=my_id)

    context = {

        'product':object

    }

    return render(request,'products/product_detail.html',context)

网址.py

path('products/<int:my_id>/',dynamic_lookup_view)

HTML

{{ product.title }}

{{ product.description }}