Question

models.py

from django.conf import settings
from django.db.models import Sum 
from django.db import models
from books.models import Book
    
class OrderItem(models.Model):
    book = models.ForeignKey(Book, on_delete=models.CASCADE)
        
    def __str__(self):
        return self.book.title
    
    
class Order(models.Model):
    user = models.ForeignKey(settings.AUTH_USER_MODEL,
                                 on_delete=models.CASCADE)
    is_ordered = models.BooleanField(default=False)
    items = models.ManyToManyField(OrderItem)
    ref_code = models.CharField(max_length=50)
    
    def __str__(self):
        return self.user.username
    
    def get_total(self):
        return self.items.all().aggregate(order_total=Sum('book__price'))['order_total']
    
class Payment(models.Model):
    order = models.ForeignKey(Order, on_delete=models.CASCADE)
    amount = models.FloatField()
    date_paid = models.DateTimeField(auto_now_add=True)
    stripe_charge_id = models.CharField(max_length=100)
    
    def __str__(self):
        return self.stripe_charge_id

模板

    {% extends 'base.html' %}
    
    
    {% block breadcrumb %}
    <li class="breadcrumb-item" aria-current="page">
        <a href="{% url 'books:book-list' %}">Book List</a></li>
    <li class="breadcrumb-item active" aria-current="page">{{ book.title }}</li>
    {% endblock %}
    
    
    {% block content %}
    <div class='row'>
        <main class='col-md-4'>
         
            <div class="card">
                <div class='card-header'>{{ book.title }}</div>
                <img src="{{ book.cover.url }}" class="card-img-top" >
                <div class="card-body">
                  <p class="card-text">Published: {{ book.publication_date }}</p>
                </div>
    
                <div class='card-footer'>
                {% if in_cart %}
              <a href="{% url 'cart:remove-from-cart' %}" class='btn btn-default btn-block'>
                Remove from Cart
              </a>
              
                  
                {% else %}
                <a href="{% url 'cart:add-to-cart' book.slug %}"class="btn btn-warning btn-block">
                  Add to Cart
                </a>
               
                {% endif %}
              </div>
              </div>
        </main>
    
        <aside class='col-md-8'>
            <div class="card" style="width: 18rem;">
                <div class="card-header">
                 Chapters
                </div>
                <ul class="list-group list-group-flush">
                    
                {% for chapter in book.chapter_set.all %}
                  <li class="list-group-item">  <a href="{{ chapter.get_absolute_url }}">
                    {{ chapter.chapter_number }}.{{ chapter.title }}
                </a></li>
                
                {% endfor %}
                </ul>
              </div>
               
    
          
               
         
        </aside>
    </div>
        
    {% endblock %}

这是django项目的Models.py，但是我得到的错误是操作错误说：没有这样的列：shopping_cart_order.user_id 我卡住了，如果你知道什么，我将不胜感激。林不知道它的模型，但我已经运行了命令： python manage.py makemigrations，python manage.py migration，python manage.py runserver

/ cart / add-to-cart / newlife /处的OperationalError没有此类列：shopping_cart_order.user_id

0 个答案: