python Djangoにて出品した商品の購入者一覧を表示したい

python Djangoにてショッピングサイトを作成しています。ユーザーごとに出品機能があり、出品した商品が購入された際、購入したユーザーの登録情報を出品したユーザーのリストに表示したいと考えております。しかし、ユーザーが出品していない商品の取引も記載されてしまいます。何か良い方法はありませんでしょうか？

python
1 models.py
2
3class User(AbstractBaseUser, PermissionsMixin):
4    """"カスタムユーザーモデル"""
5    first_name=models.CharField(max_length=30,blank=False,null=False)
6    last_name=models.CharField(max_length=30, blank=False,null=False)
7    business_person_name=models.CharField(max_length=30,blank=True)
8    email = models.EmailField(max_length=100, unique=True)
9    phone = PhoneNumberField(unique=True)
10    zip_code = models.CharField(max_length=8,blank=False,null=False)
11    prefectures = models.CharField(max_length=40,blank=False,null=False)
12    city = models.CharField(max_length=40,blank=False,null=False)
13    address1 = models.CharField(max_length=40,blank=False,null=False)
14    address2 = models.CharField(max_length=40,blank=True)
15
16
17
18
19class Listing(models.Model):
20    """出品モデル"""
21    listing_user=models.ForeignKey(User, on_delete=models.CASCADE)
22    listing_img1= models.ImageField(upload_to='listingImg',blank=False, null=False)
23    listing_img2= models.ImageField(upload_to='listingImg',blank=True, null=True)
24    listing_img3= models.ImageField(upload_to='listingImg',blank=True, null=True)
25    listing_type =models.CharField(max_length=100, choices=Type.TypeListing, blank=False, null=False)
26    listing_name=models.CharField(max_length=100,blank=False, null=False)
27    listing_text=models.TextField(max_length=500,blank=True, null=True)
28    listing_price=models.IntegerField(blank=True, null=True)
29    created = models.DateTimeField(default=timezone.now)
30    like = models.ManyToManyField(User, related_name='related_post', blank=True)
31    slug=AutoSlugField(populate_from='listing_name',null=False, unique=True)
32
33
34
35class OrderItem(models.Model):
36   """購入履歴モデル"""
37    user=models.ForeignKey(User,on_delete=models.CASCADE)
38    item=models.ForeignKey(Listing,on_delete=models.CASCADE,related_name='orderItems')
39    ordered=models.BooleanField(default=False)
40    quantity=models.IntegerField(default=1)
41

python
1 views.py
2
3class ShippingView(generic.ListView):
4    """購入者リスト"""
5    model =OrderItem
6    template_name = 'listing/shipping.html'
7    context_object_name = 'orders'
8

HTML
1{% extends 'app/base.html' %}
2{% load static %}
3{% load humanize %}
4
5
6{% block body %}
7    <section class="listing_home mg_t30">
8        {% for order in orders %}
9            <a href="{% url 'listing_detail' order.item.slug %}">
10                <div class="listing_card mg_t10 mg_b20">
11                    <img class="listing_img" src="{{ MEDIA_URL }}{{ order.item.listing_img1 }}">
12                    <div class="listing_text">
13                        <h5 class="card-title listing_name pd_l10 pd_r10 mg_t15">{{ order.item.listing_name| truncatechars:15 }}</h5>
14                        <p class="card-text listing_price pd_l20 mg_t15">￥{{ order.item.listing_price| intcomma }}</p>
15                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.item.listing_user.business_person_name}}</p>
16                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.first_name}} {{ order.user.last_name}}</p>
17                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.zip_code}}</p>
18                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.prefectures}}</p>
19                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.city}}</p>
20                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.address1}}</p>
21                        <p class="card-text listing_type_order mg_t20 pd_b10">{{ order.user.address2}}</p>
22                    </div>
23                </div>
24            </a>
25        {% endfor %}
26    </section>
27{% endblock body %}