祝大家有美好的一天。
请不要严格评判，我只是在学习。我开始学习 Django，一切似乎都很顺利，直到我遇到了将商品及其尺寸添加到购物车的问题。添加产品本身没有问题，但我需要用户通过复选框选择尺寸，然后单击“添加到购物车”按钮后，不仅会添加产品，还会添加所需的所选尺寸。
以下是产品型号、尺寸和购物车
class Product(models.Model):
article = models.CharField(max_length=12,null=False,blank=False,unique=True,primary_key=True)
img = models.ImageField(upload_to='products_images')
price = models.DecimalField(max_digits=9,decimal_places=2)
description = models.TextField(null=True,blank=True)
gender = models.CharField(max_length=12,null=False,blank=False)
is_child = models.BooleanField(null=False)
season = models.CharField(max_length=12,null=False)
color = models.CharField(max_length=24,null=False)
sizes = models.ForeignKey(to='Size',on_delete=models.CASCADE,to_field='article')
def __str__(self):
return f"{self.article}"
class Size(models.Model):
article = models.CharField(max_length=12,null=False,unique=True)
article_size = models.ForeignKey(to='ArticleSize',on_delete=models.CASCADE,to_field='article_size')
def __str__(self):
return f"{self.article}"
class ArticleSize(models.Model):
article_size = models.CharField(max_length=12, null=False, unique=True)
size_name = models.CharField(max_length=12,null=False,blank=False)
qty = models.SmallIntegerField()
to_article = models.CharField(max_length=12, null=False)
def __str__(self):
return f"{self.article_size}"
class Basket(models.Model):
user = models.ForeignKey(to=User, on_delete=models.CASCADE)
product = models.ForeignKey(to=Product, on_delete=models.CASCADE,to_field='article')
size = models.ForeignKey(to=ArticleSize,on_delete=models.CASCADE,to_field='article_size')
qty = models.PositiveSmallIntegerField(default=0)
create_time_stamp = models.DateTimeField(auto_now_add=True)
def __str__(self):
return f"Корзина для {self.user.email} товар {self.product.article},размер {self.size.size_name}"
这是表单模型：
class CheckboxForm(forms.Form):
checkbox_size = forms.CharField(widget=forms.CheckboxInput(attrs={
'class':'size_checkbox', 'type':'checkbox', 'name':'size_checkbox'}),required=True)
class Meta:
model = ArticleSize
fields = ('checkbox_size')
这是视图：
def products(request):
form = CheckboxForm()
context = {
'title': "Магазин",
'footer_1': "127015, Москва, Бумажный пр-д., д. 14, стр. 2 ООО «НИКАМЕД».",
'footer_2': "Копирование материалов запрещено.",
'products': Product.objects.all(),
'sizes': Size.objects.all(),
'article_size': ArticleSize.objects.all(),
'form': form,
}
return render(request, 'products/products.html', context)
def basket_add(request,product,size):
product = Product.objects.get(article=product)
size = ArticleSize.objects.get(article_size=size)
basket = Basket.objects.filter(user=request.user,product=product,size=size)
if not basket.exists():
Basket.objects.create(user=request.user,product=product,qty=1,size=size)
else:
basket = basket.last()
basket.qty += 1
basket.save()
return HttpResponseRedirect(request.META['HTTP_REFERER'])
这是 HTML：
<div class="goods-group">
{% for product in products %}
<div class="goods">
<div class="shoe-photo">
<a href="{% url 'products:item_info' %}">
<img src="{{ product.img.url }}" alt="нет фото">
</a>
<a href="#">
<svg class="photo-heart" fill="#C0BFBF" width="64px" height="64px" viewBox="0 0 200 200" data-name="Layer 1" id="Layer_1" xmlns="http://www.w3.org/2000/svg"><g id="SVGRepo_bgCarrier" stroke-width="0"></g><g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round"></g><g id="SVGRepo_iconCarrier"><title></title><path d="M171.28,41.69a48.29,48.29,0,0,0-68.5,0l-2.5,3-2.5-2.5a48.29,48.29,0,0,0-68.5,0c-19,18.5-19,49-1,68l50,53a29.92,29.92,0,0,0,43.5,0l50.5-53.5c17.5-19.5,17-49.5-1-68Zm-14,53.5-50.5,53.5a10.26,10.26,0,0,1-14.5,0l-50-53c-10.5-11.5-10.5-29,.5-40s29-11,40.5,0l2.5,2.5c8,8,20.5,8,28,0l2.5-2.5a28.37,28.37,0,0,1,40,0,27.78,27.78,0,0,1,1,39.5Z"></path></g></svg>
</a>
</div>
<a href="#">
<div class="price">{{product.price}} руб</div>
</a>
<a href="#">
<div class="description">{{product.description}}</div>
</a>
<div class="sizes-group">
<form action="" method="post">
{% for item in sizes %}
{% if item.article == product.article %}
{% for size in article_size %}
{% if size.to_article == item.article %}
<label>
{{form.checkbox_size}}
<span class="title_checkbox">{{size.size_name}}</span>
</label>
{% else %}
{% endif %}
{% endfor %}
{% else %}
{% endif %}
{% endfor %}
</form>
</div>
<a href="{% url 'products:basket_add' product=product.article size=product.sizes.article_size %}">
<button class="btn" type="submit">
<svg class="button-cart" fill="#C0BFBF" width="64px" height="64px" viewBox="-2 -2 204.00 204.00" data-name="Layer 1" id="Layer_1" xmlns="http://www.w3.org/2000/svg"><g id="SVGRepo_bgCarrier" stroke-width="0"></g><g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round"></g><g id="SVGRepo_iconCarrier"><title></title><path d="M183.25,52.75a18.22,18.22,0,0,0-7-1h-91c-3.5,0-8-.5-11.5.5a9.64,9.64,0,0,0-7.5,9.5,10,10,0,0,0,10,10h90.5l-8,42a10.22,10.22,0,0,1-10,8h-75a10.66,10.66,0,0,1-10-8l-16-74a20.3,20.3,0,0,0-19.5-16h-7a10,10,0,0,0,0,20h7l16,74c3,14,15,23.5,29.5,23.5h75c12,0,24.5-8,28-19.5,2.5-8,4-17,5.5-25,1.5-8.5,3.5-17,5-25a17.76,17.76,0,0,0,1-5,17,17,0,0,0,.5-5c0-4-2-8-5.5-9Zm-132,108.5a15,15,0,0,0,30,0h0a15,15,0,0,0-30,0Zm90,0a15,15,0,1,0,15-15,15,15,0,0,0-15,15v0Z"></path></g></svg>
В корзину</button>
</a>
</div>
{% endfor %}
</div>
</div>
告诉我这些问题是如何解决的？也许我正朝着错误的方向前进，我需要重写一切？
抱歉造成混乱，我已准备好澄清所有必要的事情。
先谢谢大家了！
我尝试发送以查看所选尺寸的产品。
我稍微修正了代码，现在一切正常了，好吧，它几乎可以正常工作了。如果我从视图中的模板中硬编码有关大小对象的数据，那么一切都可以，但如果我只是尝试从 request.POST.get('size') 获取值，那么我总是得到 None。
这是修正后的模型、模板和视图。
型号：
class Product(models.Model):
article = models.CharField(max_length=12,null=False,blank=False,unique=True,primary_key=True)
img = models.ImageField(upload_to='products_images')
price = models.DecimalField(max_digits=9,decimal_places=2)
description = models.TextField(null=True,blank=True)
gender = models.CharField(max_length=12,null=False,blank=False)
is_child = models.BooleanField(null=False)
season = models.CharField(max_length=12,null=False)
color = models.CharField(max_length=24,null=False)
sizes = models.ForeignKey(to='Size',on_delete=models.CASCADE,to_field='article_size')
def __str__(self):
return f"{self.article}"
类大小（模型.模型）： Article_size = models.CharField(max_length=12,null=False,unique=True,primary_key=True) size_name = models.CharField(max_length=12, null=False, 空白=False) 数量 = models.SmallIntegerField() to_article = models.CharField(max_length=12, null=False)
def __str__(self):
return f"{self.article_size}"
类篮子（模型.模型）： user = models.ForeignKey(to=User, on_delete=models.CASCADE) 产品 = models.ForeignKey(to=Product, on_delete=models.CASCADE,to_field='article') size = models.ForeignKey(to=Size,on_delete=models.CASCADE,to_field='article_size') 数量 = models.PositiveSmallIntegerField(默认=0) create_time_stamp = models.DateTimeField(auto_now_add=True) def str（自身）： 返回 f"Корзина для {self.user.email} товар {self.product.article},размер {self.size.size_name}"
模板：
<div class="goods-group">
{% for product in products %}
<div class="goods">
<div class="shoe-photo">
<a href="{% url 'products:item_info' %}">
<img src="{{ product.img.url }}" alt="нет фото">
</a>
<a href="#">
<svg class="photo-heart" fill="#C0BFBF" width="64px" height="64px" viewBox="0 0 200 200"
data-name="Layer 1" id="Layer_1" xmlns="http://www.w3.org/2000/svg">
<g id="SVGRepo_bgCarrier" stroke-width="0"></g>
<g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round"></g>
<g id="SVGRepo_iconCarrier"><title></title>
<path d="M171.28,41.69a48.29,48.29,0,0,0-68.5,0l-2.5,3-2.5-2.5a48.29,48.29,0,0,0-68.5,0c-19,18.5-19,49-1,68l50,53a29.92,29.92,0,0,0,43.5,0l50.5-53.5c17.5-19.5,17-49.5-1-68Zm-14,53.5-50.5,53.5a10.26,10.26,0,0,1-14.5,0l-50-53c-10.5-11.5-10.5-29,.5-40s29-11,40.5,0l2.5,2.5c8,8,20.5,8,28,0l2.5-2.5a28.37,28.37,0,0,1,40,0,27.78,27.78,0,0,1,1,39.5Z"></path>
</g>
</svg>
</a>
</div>
<a href="#">
<div class="price">{{product.price}} руб</div>
</a>
<a href="#">
<div class="description">{{product.description}}</div>
</a>
<div class="sizes-group">
<form id="size_checkbox_form" action="/" method="post">
{% csrf_token %}
{% for size in sizes %}
{% if product.article == size.to_article %}
<label>
<input class="size_checkbox" type="checkbox" name="{{size}}" value="{{size}}">
<span class="title_checkbox">{{size.size_name}}</span>
</label>
{%endif%}
{% endfor %}
</form>
</div>
<button form="size_checkbox_form" formaction="{% url 'products:basket_add' product.article %}" class="btn" type="submit" >
<svg class="button-cart" fill="#C0BFBF" width="64px" height="64px" viewBox="-2 -2 204.00 204.00"
data-name="Layer 1" id="Layer_1" xmlns="http://www.w3.org/2000/svg">
<g id="SVGRepo_bgCarrier" stroke-width="0"></g>
<g id="SVGRepo_tracerCarrier" stroke-linecap="round" stroke-linejoin="round"></g>
<g id="SVGRepo_iconCarrier"><title></title>
<path d="M183.25,52.75a18.22,18.22,0,0,0-7-1h-91c-3.5,0-8-.5-11.5.5a9.64,9.64,0,0,0-7.5,9.5,10,10,0,0,0,10,10h90.5l-8,42a10.22,10.22,0,0,1-10,8h-75a10.66,10.66,0,0,1-10-8l-16-74a20.3,20.3,0,0,0-19.5-16h-7a10,10,0,0,0,0,20h7l16,74c3,14,15,23.5,29.5,23.5h75c12,0,24.5-8,28-19.5,2.5-8,4-17,5.5-25,1.5-8.5,3.5-17,5-25a17.76,17.76,0,0,0,1-5,17,17,0,0,0,.5-5c0-4-2-8-5.5-9Zm-132,108.5a15,15,0,0,0,30,0h0a15,15,0,0,0-30,0Zm90,0a15,15,0,1,0,15-15,15,15,0,0,0-15,15v0Z"></path>
</g>
</svg>
В корзину
</button>
</div>
{% endfor %}
</div>
查看：
Does anyone know why None appears when submitting a button? Maybe I forgot to specify an attribute?
谢谢你。
有谁知道为什么提交按钮时出现 None ？也许我忘记指定一个属性？
谢谢你。
我解决了。如果有人感兴趣，请告诉我，我会在这里写下解决方案。