每次单击链接时，如何将数据库行增加 1？

Question

目前，每次我点击网站上的产品链接时，整个数据库列“视图”都会根据需要增加 1，因此只有行增加 1。链接会在外部网站中打开。通过单击产品图像打开链接。任何建议将不胜感激

模型.py

class T_shirt(models.Model):
    Images = models.ImageField()
    Titles = models.CharField(max_length=250, primary_key=True)
    Prices = models.CharField(max_length=250)
    Link = models.CharField(max_length=250)
    Website = models.CharField(max_length=250)
    Brand = models.CharField(max_length=250)
    views = models.IntegerField(default=0)

views.py

def t_detail(request):
    if request.method == 'POST':
        T_shirt.objects.update(views=F('views') + 1)

    if 'q' in request.GET:
        q = request.GET['q']
        owner_obj = T_shirt.objects.filter(Titles__icontains=q)
    else:
        owner_obj = T_shirt.objects.all()

    p = Paginator(owner_obj, 20)

    page_num = request.GET.get('page', 1)

    try:
        page = p.page(page_num)

    except EmptyPage:

        page = p.page(1)


    return render(request, 'tshirtshtml.html', {"owner_obj": page})

html

<ul class="products">
{% for v in owner_obj %}
    <div class="container">
    <form method="POST" type="submit">
        <button style="border: none;">
        {% csrf_token %}
    <a href="{{ v.Link }}" rel="noopener noreferrer">
  <img src="{{ v.Images }}" width="150" height="150">
    </a>
        </button>

    </form>

    <figcaption>  {{ v.Titles }} </figcaption>
    <figcaption> <b>{{ v.Prices }}</b></figcaption>
</div>

{% endfor %}

更新代码

def t_detail(request):
    if request.method == 'POST':
        T_shirt.objects.filter(Titles=request.POST.get('tshirt_id')).update(views=F('views') + 1)

    if 'q' in request.GET:
        q = request.GET['q']
        owner_obj = T_shirt.objects.filter(Titles__icontains=q)
    else:
        owner_obj = T_shirt.objects.all()

    p = Paginator(owner_obj, 20)

    page_num = request.GET.get('page', 1)

    try:
        page = p.page(page_num)

    except EmptyPage:

        page = p.page(1)

    return render(request, 'tshirtshtml.html', {"owner_obj": page})

Answer 1

您需要一些标识符来从 db 中获取该特定行，现在您正在使用此逻辑更新所有行：

    if request.method == 'POST':
        T_shirt.objects.update(views=F('views') + 1)

对于当前的实现，由于您使用的是表单，因此您可以在表单中添加一个隐藏元素，例如：

<form method="POST" type="submit">
<button style="border: none;">
    {% csrf_token %}
 <input type="hidden" name="tshirt_id" value="{{ v.id }}" />
    <a href="{{ v.Link }}" rel="noopener noreferrer">
  <img src="{{ v.Images }}" width="150" height="150">
    </a>
        </button>
   </form>

然后更改您的视图以从请求中获取 tshirt_id 并更新该行

if request.method == 'POST':
        T_shirt.objects.filter(id=request.POST.get('tshirt_id')).update(views=F('views') + 1)