django-models - 对象不可迭代

Question

我正在尝试从订单模型中获取订单记录并作为上下文传递到模板中，但是当我在循环中使用循环时会出现模板问题，例如

                                        {% for o in objects %}
                                        {% for p in o %}
                                        <tr>
                                            <td>{{forloop.counter}}</td>
                                            <td>{{p.img.url}}</td>
                                            <td>{{o.date}}</td>
                                            <td>{{p.price}}</td>
                                            {% if o.order_status == 'completed' %}
                                            <td><small style="background-color:green;"><span class="badge badge-success">{{o.order_status}}</span></small></td>                    
                                            {% else %}
                                            <td><small style="background-color:rgb(231, 211, 26);"><span class="badge badge-warning">{{o.order_status}}</span></small></td>
                                            {% endif %}
                                        </tr>
                                        {% endfor %}
                                        {% endfor %}

我正在获取与特定订单对象相关的产品，并作为该特定订单对象的上下文传递，例如

context=OrderProduct.fetch_customer_order_products(customer)

OrderProduct.py 模型

from django.db.models.deletion import DO_NOTHING
from django.shortcuts import get_object_or_404
from django.db.models import Case, When
from django.db import models
from django.db.models.fields.related import ForeignKey
from .order import Order
from .products import Products
from .customer import Customer

class OrderProduct(models.Model):
    order = models.ForeignKey(Order, on_delete=models.CASCADE)
    product = models.ForeignKey(Products, on_delete=models.DO_NOTHING)
    customer = models.ForeignKey(Customer, on_delete=DO_NOTHING, default="")
    quantity = models.IntegerField()

    def __str__(self):
        return self.product.name
    @staticmethod
    def fetch_customer_order_products(cust):
        obj = Order.objects.filter(customer=cust)
        dict = {}
        context={}
        for o in obj:
            l = []
            id = o.id
            prods = list(Order.objects.filter(id=id).values('products'))
            for a in range(0,len(prods)):
                l.append(prods[a]['products'])
            dict[o] = l
            prods = list(Products.objects.filter(id__in=l))  # to be passed as context 
            
         
            context[o]=prods
        context['objects'] = obj

        return context

order.py 模型

from django.db import models
from django.db.models.enums import Choices
from django.db.models.fields.related import ManyToManyField
from .customer import Customer
from .products import Products
from .payment_method import Payment_method
from datetime import datetime

Order_status_choices = (
    ('created', 'Created'),
    ('approved', 'Approved'),
    ('paid','Paid'),
    ('packaged','Packaged'),
    ('shipped','Shipped'),
    ('completed','Completed'),
)

class Order(models.Model):
    name = models.CharField(max_length=20, default="")
    products = models.ManyToManyField(Products)
    customer = models.ForeignKey(Customer, on_delete=models.DO_NOTHING)
    address = models.CharField(max_length=100, default='')
    order_status = models.CharField(max_length=20, choices = Order_status_choices, default='created')
    shipping_address = models.CharField(max_length=100, default='')
    phno = models.BigIntegerField(default=00000000000)
    email = models.EmailField(default="")
    date = models.DateTimeField(default=datetime.now,blank=True)
    price = models.IntegerField(default=0)
    payment_method = models.ForeignKey(Payment_method, on_delete=models.DO_NOTHING, null=True)
    name_additional = models.CharField(max_length=20, null=True,blank=True)
    phno_additional = models.BigIntegerField(null=True, blank=True)

    def __str__(self):
        return self.name

    @staticmethod
    def get_order_by_customer_id(customer):
        return Order.objects.filter(customer=customer)

myaccount.html 文件

{% extends 'base.html' %}
{% load static %}
{% load cart %}
{% block content %}
        
        <!-- Breadcrumb Start -->
        <div class="breadcrumb-wrap">
            <div class="container-fluid">
                <ul class="breadcrumb">
                    <li class="breadcrumb-item"><a href="#">Home</a></li>
                    <li class="breadcrumb-item"><a href="#">Products</a></li>
                    <li class="breadcrumb-item active">My Account</li>
                </ul>
            </div>
        </div>
        <!-- Breadcrumb End -->
        
        
        <!-- My Account Start -->
        <div class="my-account">
            <div class="container-fluid">
                <div class="row">
                    <div class="col-md-3">
                        <div class="nav flex-column nav-pills" role="tablist" aria-orientation="vertical">
                            <a class="nav-link active" id="dashboard-nav" data-toggle="pill" href="#dashboard-tab" role="tab"><i class="fa fa-tachometer-alt"></i>Dashboard</a>
                            <a class="nav-link" id="orders-nav" data-toggle="pill" href="#orders-tab" role="tab"><i class="fa fa-shopping-bag"></i>Orders</a>
                            <a class="nav-link" id="payment-nav" data-toggle="pill" href="#payment-tab" role="tab"><i class="fa fa-credit-card"></i>Payment Method</a>
                            <a class="nav-link" id="address-nav" data-toggle="pill" href="#address-tab" role="tab"><i class="fa fa-map-marker-alt"></i>address</a>
                            <a class="nav-link" id="account-nav" data-toggle="pill" href="#account-tab" role="tab"><i class="fa fa-user"></i>Account Details</a>
                            <a class="nav-link" href="index.html"><i class="fa fa-sign-out-alt"></i>Logout</a>
                        </div>
                    </div>
                    <div class="col-md-9">
                        <div class="tab-content">
                            <div class="tab-pane fade show active" id="dashboard-tab" role="tabpanel" aria-labelledby="dashboard-nav">
                                <h4>Dashboard</h4>
                                <p>
                                    Lorem ipsum dolor sit amet, consectetur adipiscing elit. In condimentum quam ac mi viverra dictum. In efficitur ipsum diam, at dignissim lorem tempor in. Vivamus tempor hendrerit finibus. Nulla tristique viverra nisl, sit amet bibendum ante suscipit non. Praesent in faucibus tellus, sed gravida lacus. Vivamus eu diam eros. Aliquam et sapien eget arcu rhoncus scelerisque.
                                </p> 
                            </div>
                            <div class="tab-pane fade" id="orders-tab" role="tabpanel" aria-labelledby="orders-nav">
                                <div class="table-responsive">
                                    <table class="table table-bordered">
                                        <thead class="thead-dark">
                                            <tr>
                                                <th>Sno</th>
                                                <th>image</th>
                                                <th>DateTime</th>
                                                <th>price</th>
                                                <th>Order Status</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            {% for o in objects %}
                                            {% for p in o %}
                                            <tr>
                                                <td>{{forloop.counter}}</td>
                                                <td>{{p.img.url}}</td>
                                                <td>{{o.date}}</td>
                                                <td>{{p.price}}</td>
                                                {% if order.order_status == 'completed' %}
                                                <td><small style="background-color:green;"><span class="badge badge-success">{{order.order_status}}</span></small></td>                    
                                                {% else %}
                                                <td><small style="background-color:rgb(231, 211, 26);"><span class="badge badge-warning">{{order.order_status}}</span></small></td>
                                                {% endif %}
                                            </tr>
                                            {% endfor %}
                                            {% endfor %}
                                        </tbody>
                                    </table>
                                </div>
                            </div>
                            <div class="tab-pane fade" id="payment-tab" role="tabpanel" aria-labelledby="payment-nav">
                                <h4>Payment Method</h4>
                                <p>
                                    Lorem ipsum dolor sit amet, consectetur adipiscing elit. In condimentum quam ac mi viverra dictum. In efficitur ipsum diam, at dignissim lorem tempor in. Vivamus tempor hendrerit finibus. Nulla tristique viverra nisl, sit amet bibendum ante suscipit non. Praesent in faucibus tellus, sed gravida lacus. Vivamus eu diam eros. Aliquam et sapien eget arcu rhoncus scelerisque.
                                </p> 
                            </div>
                            <div class="tab-pane fade" id="address-tab" role="tabpanel" aria-labelledby="address-nav">
                                <h4>Address</h4>
                                <div class="row">
                                    <div class="col-md-6">
                                        <h5>Payment Address</h5>
                                        <p>123 Payment Street, Los Angeles, CA</p>
                                        <p>Mobile: [phone]</p>
                                        <button class="btn">Edit Address</button>
                                    </div>
                                    <div class="col-md-6">
                                        <h5>Shipping Address</h5>
                                        <p>123 Shipping Street, Los Angeles, CA</p>
                                        <p>Mobile: [phone]</p>
                                        <button class="btn">Edit Address</button>
                                    </div>
                                </div>
                            </div>
                            <div class="tab-pane fade" id="account-tab" role="tabpanel" aria-labelledby="account-nav">
                                <h4>Account Details</h4>
                                <div class="row">
                                    
                                    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
                                    <div id="profile-container">
                                    {% if profile.img %}
                                    <img width="50" height="70" id="profileImage" src="{{profile.img.url}}" />
                                    {% else %}
                                    <img width="50" height="70" id="profileImage" src="https://p1.pxfuel.com/preview/423/292/62/girl-studio-female-woman-profile-black-and-white.jpg" />
                                    {% endif %}
                                    </div><br><br><br><br><br><br>
                                    <form action="/my-account" method="post" enctype="multipart/form-data">
                                        {% csrf_token %}
                                        
                                            {{form.as_p}}
                                        {% if request.session.customer|check_customer_profile %}
                                        <div class="col-md-12">
                                            <button type="submit" class="btn">update profile</button>
                                            <br><br>
                                        </div>
                                        {% else %}
                                        <div class="col-md-12">
                                            <button type="submit" class="btn">Create profile</button>
                                            <br><br>
                                        </div>
                                        {% endif %}
                                    </form>
                                    
                                </div>
                                
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <!-- My Account End -->
        
       {% endblock %}

我的帐户.py

from django.utils.decorators import method_decorator
from ..middlewares.authorization import auth_middleware
from store.models.customer import Customer
from django.views import View
from django.shortcuts import render,redirect
from ..models.order import Order
from ..models.orderproduct import OrderProduct
from ..models.profile import Profile
from ..forms.ProfileForm import ProfileForm
class MyAccount(View):
    @method_decorator(auth_middleware)
    def get(self, request):
        customer = request.session.get('customer')
        

        if customer:
            profile = Profile.whether_customer_exists(customer)
            form = None
            form = ProfileForm(instance=profile)
            context=OrderProduct.fetch_customer_order_products(customer)
            
            context['form']=form
            
            if profile:
                context['profile'] = profile
        
        print(context)  
        return render(request, 'my-account.html',context)

    def post(self, request):
        customer = request.session.get('customer')
        if customer:
            profile = Profile.whether_customer_exists(customer)
            if profile:
                form = ProfileForm(request.POST or None, request.FILES or None,instance=profile)
                if form.is_valid():
                    form.save()
                
            else:
                cust = Customer.objects.filter(id = customer).first()
                
                
                
                form = ProfileForm(request.POST or None, request.FILES or None)
                form1 = form.save(commit=False)
                form1.customer = cust
                form1.save()
                
            
            form = ProfileForm(instance=profile)
            context = {'form':form}

            return render(request, 'my-account.html',context)
                

                
            
        else:
            return redirect('login')

标签： django-modelsdjango-templates

Answer 1

实际上，我试图做的是获取与特定 Ordermodel 对象相关的客户订购的产品及其从 OrderProductmodel 中的相应数量，我将订单对象提供给内部循环，以将与该对象相关的产品显示为

                                {% for o in objects %}
                                {% for p in o %}
                                <tr>
                                    <td>{{forloop.counter}}</td>
                                    <td>{{p.img.url}}</td>
                                    <td>{{o.date}}</td>
                                    <td>{{p.price}}</td>
                                    {% if o.order_status == 'completed' %}
                                    <td><small style="background-color:green;"><span class="badge badge-success">{{o.order_status}}</span></small></td>                    
                                    {% else %}
                                    <td><small style="background-color:rgb(231, 211, 26);"><span class="badge badge-warning">{{o.order_status}}</span></small></td>
                                    {% endif %}
                                </tr>
                                {% endfor %}
                                {% endfor %}

所以如何解决这个问题是通过上下文获取订单查询集对象到模板，并且在模板内部使用循环迭代查询集并获取订单对象，然后在 templatetags 文件夹中创建一个自定义模板过滤器来获取与特定对象相关的产品通过将 order 对象作为参数提供给 cuttom 过滤器，例如

{%for o in objects %}
                                <h4>Order{{forloop.counter}}</h4>
                                <div class="table-responsive">
                                    <table class="table table-bordered">
                                        <thead class="thead-dark">
                                            <tr>
                                                <th>Sno</th>                                   
                                                <th>image</th>
                                                <th>Name</th>
                                                <th>price</th>
                                                <th>Quantity</th>
                                                <th>product total</th>
                                                <th>DateTime</th>
                                                <th>Order Status</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                            
                                            {% for p in o|get_object_related_products:request.session.customer %}
                                            <tr>
                                                <td>{{forloop.counter}}</td>
                                                <td>
                                                <div class="img">
                                                    <a href="#"><img src="{{p.img.url}}" alt="Image" height="50px" width="50px"></a>
                                                </div>
                                                </td>
                                                <td>{{p.name}}</td>
                                                <td>{{p.price}}</td>
                                                <td>{{o|get_product_quantity:p}}</td>
                                                <td>{{o|get_order_total:p}}</td>
                                                <td>{{o.date}}</td>
                                                {% if o.order_status == 'completed' %}
                                                <td><small style="background-color:green;"><span class="badge badge-success">{{o.order_status}}</span></small></td>                    
                                                {% else %}
                                                <td><small style="background-color:rgb(231, 211, 26);"><span class="badge badge-warning">{{o.order_status}}</span></small></td>
                                                {% endif %}
                                            </tr>
    {% endfor %}

所以感谢任何考虑过的人......